ORCID Profile
0000-0002-8537-6765
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Materials Engineering | Polymers and Plastics | Composite and Hybrid Materials | Nanotechnology | Crop and Pasture Biomass and Bioproducts | Colloid And Surface Chemistry | Polymers | Nanotechnology | Biomaterials | Civil Engineering | Macromolecular and Materials Chemistry not elsewhere classified | Catalysis and mechanisms of reactions | Chemical Spectroscopy | Chemical Engineering Design | Electrochemistry | Composite Materials | Materials Engineering not elsewhere classified | Functional materials | Physical chemistry | Packaging, Storage And Transportation | Environmental Engineering not elsewhere classified | Anthropology | Manufacturing Processes and Technologies (excl. Textiles) | Membrane Biology | Biomedical Engineering Not Elsewhere Classified | Landscape Ecology | Electrochemical energy storage and conversion | Civil Geotechnical Engineering | Solid State Chemistry | Construction Engineering | Biomedical Engineering | Crop and Pasture Production | Physical Chemistry (Incl. Structural) | Nanoscale Characterisation | Nanomaterials | Building Science And Techniques | Wood Fibre Processing | Energy Generation, Conversion and Storage Engineering | Construction Engineering | Chemical Engineering not elsewhere classified | Tribology | Membrane And Separation Technologies | Forestry Biomass and Bioproducts | Social And Cultural Anthropology |
ANZSRC Socio-Economic Objective (SEO)
Environmentally Sustainable Manufacturing not elsewhere classified | Plastic products (incl. Construction materials) | Plastic Products (incl. Construction Materials) | Other | Metals (e.g. Composites, Coatings, Bonding) | Primary products from plants | Plant Production and Plant Primary Products not elsewhere classified | Materials performance and processes | Biological sciences | Ceramics, Glass and Industrial Mineral Products not elsewhere classified | Chemical sciences | Climate change | Oil and Gas Extraction | Energy Storage (excl. Hydrogen) | Coal Mining and Extraction | Mining Machinery and Equipment | Skeletal system and disorders (incl. arthritis) | Diagnostics | Manufactured products not elsewhere classified | Aboriginal and Torres Strait Islander development and welfare | Urban and Industrial Air Quality | Plastics in primary forms | Polymeric Materials (e.g. Paints) | Public Health (excl. Specific Population Health) not elsewhere classified | Reconstituted Timber Products (e.g. Chipboard, Particleboard) | Primary Mining and Extraction of Mineral Resources not elsewhere classified | Transport Equipment not elsewhere classified | Management of Solid Waste from Plant Production | Energy transformation not elsewhere classified | Plastics in Primary Forms | Polymeric materials (e.g. paints) | Industrial Chemicals and Related Products not elsewhere classified | Expanding Knowledge in Engineering | Other
Related Links
Publications
Synthesis and characterization of dual radiolabeled layered double hydroxide nanoparticles for use in in vitro and in vivo nanotoxicology studies
Publisher: American Chemical Society (ACS)
Date: 23-12-2010
DOI: 10.1021/JP905347X
Dip-and-Drag Lateral Force Spectroscopy for Measuring Adhesive Forces between Nanofibers.
Publisher: American Chemical Society (ACS)
Date: 06-12-2016
DOI: 10.1021/ACS.LANGMUIR.6B03467
Abstract: Adhesive interactions between nanofibers strongly influence the mechanical behavior of soft materials composed of fibrous networks. We use atomic force microscopy in lateral force mode to drag a cantilever tip through fibrous networks, and use the measured lateral force response to determine the adhesive forces between fibers of the order of 100 nm diameter. The peaks in lateral force curves are directly related to the detachment energy between two fibers the data is analyzed using the Jarzynski equality to yield the average adhesion energy of the weakest links. The method is successfully used to measure adhesion forces arising from van der Waals interactions between electrospun polymer fibers in networks of varying density. This approach overcomes the need to isolate and handle in idual fibers, and can be readily employed in the design and evaluation of advanced materials and biomaterials which, through inspiration from nature, are increasingly incorporating nanofibers. The data obtained with this technique may also be of critical importance in the development of network models capable of predicting the mechanics of fibrous materials.
What are the driving factors influencing the size distribution of airborne synthetic clay particles emitted from a jet milling process?
Publisher: Taiwan Association for Aerosol Research
Date: 2016
Corrosion of high purity Mg, AZ91, ZE41 and Mg2Zn0.2Mn in Hank’s solution at room temperature
Publisher: Elsevier BV
Date: 03-2011
Degradable alginate hydrogels crosslinked by the macromolecular crosslinker alginate dialdehyde
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM30564J
A systematic study substituting polyether polyol with palm kernel oil based polyester polyol in rigid polyurethane foam
Publisher: Elsevier BV
Date: 04-2015
Allometric scaling of skin thickness, elasticity, viscoelasticity to mass for micro-medical device translation
Publisher: Springer Science and Business Media LLC
Date: 21-11-2017
DOI: 10.1038/S41598-017-15830-7
Abstract: Emerging micro-scale medical devices are showing promise, whether in delivering drugs or extracting diagnostic biomarkers from skin. In progressing these devices through animal models towards clinical products, understanding the mechanical properties and skin tissue structure with which they interact will be important. Here, through measurement and analytical modelling, we advanced knowledge of these properties for commonly used laboratory animals and humans (~30 g to ~150 kg). We hypothesised that skin’s stiffness is a function of the thickness of its layers through allometric scaling, which could be estimated from knowing a species’ body mass. Results suggest that skin layer thicknesses are proportional to body mass with similar composition ratios, inter- and intra-species. Experimental trends showed elastic moduli increased with body mass, except for human skin. To interpret the relationship between species, we developed a simple analytical model for the bulk elastic moduli of skin, which correlated well with experimental data. Our model suggest that layer thicknesses may be a key driver of structural stiffness, as the skin layer constituents are physically and therefore mechanically similar between species. Our findings help advance the knowledge of mammalian skin mechanical properties, providing a route towards streamlined micro-device research and development onto clinical use.
Fluorescent layered double hydroxide nanoparticles for biological studies
Publisher: Elsevier BV
Date: 03-2010
Structure–Property Relationships in Biomedical Thermoplastic Polyurethane Nanocomposites
Publisher: American Chemical Society (ACS)
Date: 12-12-2011
DOI: 10.1021/MA202189E
Argon plasma treatment-induced grafting of acrylic acid onto expanded poly(tetrafluoroethylene) membranes
Publisher: Elsevier BV
Date: 11-2013
Chemical modification of multiwalled carbon nanotube with a bifunctional caged ligand for radioactive labelling
Publisher: Elsevier BV
Date: 02-2014
A novel strategy for preparing mechanically robust ionically cross-linked alginate hydrogels
Publisher: IOP Publishing
Date: 24-03-2011
DOI: 10.1088/1748-6041/6/2/025010
Abstract: The properties of alginate films modified using two cross-linker ions (Ca(2+) and Ba(2+)), comparing two separate cross-linking techniques (the traditional immersion (IM) method and a new strategy in a pressure-assisted diffusion (PD) method), are evaluated. This was achieved through measuring metal ion content, water uptake and film stability in an ionic solution ([Ca(2+)] = 2 mM). Characterization of the internal structure and mechanical properties of hydrated films were established by cryogenic scanning electron microscopy and tensile testing, respectively. It was found that gels formed by the PD technique possessed greater stability and did not exhibit any delamination after 21 day immersion as compared to gels formed by the IM technique. The Ba(2+) cross-linked gels possessed significantly higher cross-linking density as reflected in lower water content, a more dense internal structure and higher Young's modulus compared to Ca(2+) cross-linked gels. For the Ca(2+) cross-linked gels, a large improvement in the mechanical properties was observed in gels produced by the PD technique and this was attributed to thicker pore walls observed within the hydrogel structure. In contrast, for the Ba(2+) cross-linked gels, the PD technique resulted in gels that had lower tensile strength and strain energy density and this was attributed to phase separation and larger macropores in this gel.
Effect of Processing Route on the Morphology of Thermoplastic Polyurethane (TPU) Nanocomposites Incorporating Organofluoromica
Publisher: Trans Tech Publications, Ltd.
Date: 11-2013
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.832.27
Abstract: In the production of polymer nanocomposites, the processing method determines the dispersion of the nanofiller and hence, the final nanocomposite properties. In this work, the potential of high energy milling of the organofluoromica to improve the platelet dispersion and exfoliation in both solvent cast and melt processed thermoplastic polyurethane (TPU)/organofluoromica nanocomposites was investigated. The potential of high energy milling of the organofluoromica to improve the platelet dispersion and exfoliation in both solvent cast and melt processed thermoplastic polyurethane (TPU)/organofluoromica nanocomposites was investigated. The applied high energy milling process has successfully reduced this nanofiller platelet length from 640 nm to 400 nm and 250 nm after 1 hour and 2 hours respectively. These lower aspect ratio milled nanofillers resulted in improved quality of dispersion and delamination when incorporated into the TPU and hence interacted more preferentially with the TPU matrix.
Differential plasma protein binding to metal oxide nanoparticles.
Publisher: IOP Publishing
Date: 13-10-2009
DOI: 10.1088/0957-4484/20/45/455101
Abstract: Nanoparticles rapidly interact with the proteins present in biological fluids, such as blood. The proteins that are adsorbed onto the surface potentially dictate the biokinetics of the nanomaterials and their fate in vivo. Using nanoparticles with different sizes and surface characteristics, studies have reported the effects of physicochemical properties on the composition of adsorbed plasma proteins. However, to date, few studies have been conducted focusing on the nanoparticles that are commonly exposed to the general public, such as the metal oxides. Using previously established ultracentrifugation approaches, two-dimensional gel electrophoresis and mass spectrometry, the current study investigated the binding of human plasma proteins to commercially available titanium dioxide, silicon dioxide and zinc oxide nanoparticles. We found that, despite these particles having similar surface charges in buffer, they bound different plasma proteins. For TiO2, the shape of the nanoparticles was also an important determinant of protein binding. Agglomeration in water was observed for all of the nanoparticles and both TiO2 and ZnO further agglomerated in biological media. This led to an increase in the amount and number of different proteins bound to these nanoparticles. Proteins with important biological functions were identified, including immunoglobulins, lipoproteins, acute-phase proteins and proteins involved in complement pathways and coagulation. These results provide important insights into which human plasma proteins bind to particular metal oxide nanoparticles. Because protein absorption to nanoparticles may determine their interaction with cells and tissues in vivo, understanding how and why plasma proteins are adsorbed to these particles may be important for understanding their biological responses.
Polydimethylsiloxane/polyether-mixed macrodiol-based polyurethane elastomers: Biostability
Publisher: Elsevier BV
Date: 05-2000
DOI: 10.1016/S0142-9612(99)00271-9
Abstract: A series of four thermoplastic polyurethane elastomers were synthesized with varying proportions of poly(hexamethylene oxide) (PHMO) and poly(dimethylsiloxane) (PDMS) macrodiols. The macrodiol ratios (by weight) employed were (% PDMS:% PHMO) 100:0, 80:20, 50:50 and 20:80. The weight fraction of macrodiol in each polymer was fixed at 60%. The mixed macrodiols were reacted with 4,4'-methylenediphenyl diisocyanate (MDI) and 1,4-butanediol (BDO) chain extender. The biostability of these polymers was assessed by strained subcutaneous implantation in sheep for three months followed by microscopic examination. Pellethane 2363-80A and 2363-55D were employed as control materials. The mechanical properties of the polymers were tested and discussed along with the biostability results. The results showed that soft, flexible PDMS-based polyurethanes with very promising biostability can be successfully produced using the mixed macrodiol approach. The formulation with 80% PDMS macrodiol produced the best result in terms of a combination of flexibility, strength and biostability.
Process modelling in Anionically Polymerised Polyamide-6 (APA6) for the in situ polymerisation of composite matrices
Publisher: Elsevier BV
Date: 06-2018
New methods for the assessment of in vitro and in vivo stress cracking in biomedical polyurethanes
Publisher: Elsevier BV
Date: 05-2001
DOI: 10.1016/S0142-9612(00)00262-3
Abstract: This article describes a new test method for the assessment of the severity of environmental stress cracking of biomedical polyurethanes in a manner that minimizes the degree of subjectivity involved. The effect of applied strain and acetone pre-treatment on degradation of Pellethane 2363 80A and Pellethane 2363 55D polyurethanes under in vitro and in vivo conditions is studied. The results are presented using a magnification-weighted image rating system that allows the semi-quantitative rating of degradation based on distribution and severity of surface damage. Devices for applying controlled strain to both flat sheet and tubing s les are described. The new rating system consistently discriminated between the effects of acetone pre-treatments, strain and exposure times in both in vitro and in vivo experiments. As expected, P80A underwent considerable stress cracking compared with P55D. P80A produced similar stress crack ratings in both in vivo and in vitro experiments, however P55D performed worse under in vitro conditions compared with in vivo. This result indicated that care must be taken when interpreting in vitro results in the absence of in vivo data.
Gel point as a measure of cellulose nanofibre quality and feedstock development with mechanical energy
Publisher: Springer Science and Business Media LLC
Date: 11-08-2016
Spinifex nanocellulose derived hard carbon anodes for high-performance sodium-ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7SE00169J
Abstract: Spinifex grass derived hard carbon is used as anodes for sodium-ion batteries. Extraordinary stability and capacity retention of ∼300 mA h g −1 on prolonged cycling against sodium was observed. The eco-friendly and low-cost synthesis procedure make the biomass derived carbon material promising for energy storage applications.
Biomimetic synthesis and tensile properties of nanostructured high volume fraction hydroxyapatite and chitosan biocomposite films
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/B914798E
Nanocellulose from Spinifex as an Effective Adsorbent to Remove Cadmium(II) from Water
Publisher: American Chemical Society (ACS)
Date: 23-01-2018
High aspect ratio nanocellulose from an extremophile spinifex grass by controlled acid hydrolysis
Publisher: Springer Science and Business Media LLC
Date: 26-06-2017
Polyethylene multiwalled carbon nanotube composites
Publisher: Elsevier BV
Date: 09-2005
Sorghum as a novel biomass for the sustainable production of cellulose nanofibers
Publisher: Elsevier BV
Date: 11-2021
Minireview: Nanoparticles for molecular imaging - An overview
Publisher: The Endocrine Society
Date: 02-2010
DOI: 10.1210/EN.2009-1012
Abstract: Molecular imaging is a technique for quantifying physiological changes in vivo using imaging probes, or beacons, which can be detected noninvasively. This field of study has advanced rapidly in recent years, in part due to the application of nanotechnology. The versatility of different imaging modalities has been significantly enhanced by innovative nanoparticle development. These nanoprobes can be used to image specific cells and tissues within a whole organism. Some of the nanoparticles under development may be useful to measure biological processes associated with human disease and help monitor how these change with treatment. This review highlights some of the recent advances in nanoparticles for molecular imaging. It also addresses issues that arise with the use of nanoparticles. Whereas much of the technology remains at an experimental stage, the potential for enhancing disease diagnosis and treatment is considerable.
Organization of mixed dimethyldioctadecylammonium and choline modifiers on the surface of synthetic hectorite
Publisher: Elsevier BV
Date: 11-2013
DOI: 10.1016/J.JCIS.2013.07.055
Abstract: Understanding the nature of mixed surfactant self-assembly on the surface of organoclays is an important step toward optimizing their performance in polymer nanocomposites and for other potential applications, where selective surface interactions are crucial. In segmented thermoplastic polyurethane nanocomposite systems, dual-modified organoclays have shown significantly better performance compared to their single-modified counterparts. Until now, we had not fully characterized the physical chemistry of these dual-modified layered silicates, but had hypothesized that the enhanced composite performance arises due to some degree of nanoscale phase separation on the nanofiller surface, which enables enhanced compatibilization and more specific and inclusive interactions with the nanoscale hard and soft domains in these thermoplastic elastomers. This work examines the organization of quaternary alkyl ammonium compounds on the surface of Lucentite SWN using X-ray diffraction (XRD), thermogravimetric analysis (TGA), attenuated total reflectance Fourier-transfer infrared (ATR FT-IR), (13)C cross-polarization (CP)/magic angle spinning (MAS) nuclear magnetic resonance (NMR), and small-angle neutron scattering (SANS). When used in combination with choline, dimethyldioctadecylammonium (DMDO) was observed to self-assemble into discontinuous hydrophobic domains. The inner part of these hydrophobic domains was essentially unaffected by the choline (CC) however, surfactant intermixing was observed either at the periphery or throughout the choline-rich phase surrounding those domains.
High surface area nanoporous carbon derived from high quality jute from Bangladesh
Publisher: Elsevier BV
Date: 09-2018
Release of bioactive peptides from polyurethane films in vitro and in vivo: Effect of polymer composition
Publisher: Elsevier BV
Date: 09-2016
DOI: 10.1016/J.ACTBIO.2016.05.034
Abstract: Thermoplastic polyurethanes (TPUs) are widely used in biomedical applications due to their excellent biocompatibility. Their role as matrices for the delivery of small molecule therapeutics has been widely reported. However, very little is known about the release of bioactive peptides from this class of polymers. Here, we report the release of linear and cyclic peptides from TPUs with different hard and soft segments. Solvent casting of the TPU at room temperature mixed with the different peptides resulted in reproducible efflux profiles with no evidence of drug degradation. Peptide release was dependent on the size as well as the composition of the TPU. Tecoflex 80A (T80A) showed more extensive release than ElastEon 5-325, which correlated with a degree of hydration. It was also shown that the composition of the medium influenced the rate and extent of peptide efflux. Blending the different TPUs allowed for better control of peptide efflux, especially the initial burst effect. Peptide-loaded TPU prolonged the plasma levels of the anti-inflammatory cyclic peptide PMX53, which normally has a plasma half-life of less than 30min. Using a blend of T80A and E5-325, therapeutic plasma levels of PMX53 were observed up to 9days following a single intraperitoneal implantation of the drug-loaded film. PMX53 released from the blended TPUs significantly inhibited B16-F10 melanoma tumor growth in mice demonstrating its bioactivity in vivo. This study provides important findings for TPU-based therapeutic peptide delivery that could improve the pharmacological utility of peptides as therapeutics. Therapeutic peptides can be highly specific and potent pharmacological agents, but are poorly absorbed and rapidly degraded in the body. This can be overcome by using a matrix that protects the peptide in vivo and promotes its slow release so that a therapeutic effect can be achieved over days or weeks. Thermoplastic polyurethanes are a versatile family of polymers that are biocompatible and used for medical implants. Here, the release of several peptides from a range of polyurethanes was shown to depend on the type of polymer used in the polyurethane. This is the first study to examine polyurethane blends for peptide delivery and shows that the rate and extent of peptide release can be fine-tuned using different hard and soft segment mixtures in the polymer.
Toxicity and regulatory perspectives of carbon nanotubes
Publisher: Elsevier
Date: 2011
Effect of MWCNT addition on the thermal and rheological properties of polymethyl methacrylate bone cement
Publisher: Elsevier BV
Date: 08-2011
Graphene‐Wrapped Nanoporous Nickel‐Cobalt Oxide Flakes for Electrochemical Supercapacitors
Publisher: Wiley
Date: 06-08-2018
Physical and electrochemical characterization of nanocomposite membranes of Nafion and functionalized silicon oxide
Publisher: American Chemical Society (ACS)
Date: 07-04-2007
DOI: 10.1021/CM0628698
Effects of Processing Method and Nanofiller Size on Mechanical Properties of Biomedical Thermoplastic Polyurethane (TPU) Nanocomposites
Publisher: Trans Tech Publications, Ltd.
Date: 03-2014
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.911.115
Abstract: The effects of processing method and nanofiller size on mechanical performance of biomedical thermoplastic polyurethane (TPU)-organosilicate nanocomposites were examined. High energy milled organofluoromica nanofillers having reduced platelet aspect ratio and tactoid size were produced in order to obtain an overall better dispersion and more efficient TPU-organofluoromica nanocomposite reinforcement. Regardless the processing method, the lower aspect ratio milled nanofillers resulted in improved quality of dispersion and delamination when incorporated into the TPU and hence induced greater mechanical properties as compared to the non-milled nanofiller. However, the high temperature applied in melt compounding process might induce some degree of degradation of the dual surfactants employed, producing free amines and alkenes that can subsequently reduce the molecular weight of the TPU. Therefore, the expected larger increases in mechanical properties of melt blended TPU nanocomposites were not observed.
Tailoring the Void Size of Iron Oxide@Carbon Yolk-Shell Structure for Optimized Lithium Storage
Publisher: Wiley
Date: 04-2014
Physico-thermal properties of spinifex resin bio-polymer
Publisher: Elsevier BV
Date: 04-2012
Evaluation of properties and specific energy consumption of spinifex-derived lignocellulose fibers produced using different mechanical processes
Publisher: Springer Science and Business Media LLC
Date: 22-06-2019
Stable non-covalent labeling of layered silicate nanoparticles for biological imaging
Publisher: Elsevier BV
Date: 04-2016
DOI: 10.1016/J.MSEC.2015.12.047
Abstract: Layered silicate nanoparticles (LSN) are widely used in industrial applications and consumer products. They also have potential benefits in biomedical applications such as implantable devices and for drug delivery. To study how nanomaterials interact with cells and tissues, techniques to track and quantify their movement through different biological compartments are essential. While radiolabels can be very sensitive, particularly for in vivo studies, fluorescent labeling has been preferred in recent years because of the array of methods available to image and quantify fluorescent nanoparticles. However, labeling can be problematic, especially if it alters the physical properties of the nanomaterial. Herein is described a novel non-covalent labeling technique for LSN using readily available fluorescent dimeric cyanine dyes without the need to use excess amounts of dye to achieve labeling, or the need for removal of unbound dye. The approach utilizes the cationic binding properties of layered silicate clays and the multiple quaternary nitrogens associated with the dyes. Preparation of YOYO-1 labeled LSN with optimal dispersion in aqueous media is presented. The utilization of the labeled particles is then demonstrated in cell binding and uptake studies using flow cytometry and confocal microscopy. The labeled LSN are highly fluorescent, stable and exhibit identical physical properties with respect to the unlabeled nanoparticles. The general approach described here is applicable to other cyanine dyes and may be utilized more widely for labeling nanoparticles that comprise a crystalline plate structure with a high binding capacity.
Power generation and wastewater treatment using a novel SPEEK nanocomposite membrane in a dual chamber microbial fuel cell
Publisher: Elsevier BV
Date: 2015
Thermoplastic polyurethane (TPU)-based polymer nanocomposites
Publisher: Elsevier
Date: 2012
The effect of fibre length and matrix modification on the fire performance of thermoplastic composites: The behaviour of PP as an example of non-charring matrix
Publisher: SAGE Publications
Date: 26-05-2022
Abstract: The fire performance of fibre-reinforced polypropylene (PP) was investigated with respect to fibre length and modification of the matrix. Fibre lengths of 3 mm, 12 mm, and continuous fibres were used as reinforcements. E-glass continuous fabrics were melt impregnated with PP and consolidated via compression moulding. E-glass fibre-reinforced PP pellets of 3 and 12 mm were compression moulded. Cone calorimetry tests with incident radiant fluxes of 20, 30 and 35 kW m −2 were used to investigate the fire properties of PP glass fibre composites. Results showed that continuous glass fibre reinforced PP exhibits the best fire performance at 20 kW m −2 , while 3-mm fibre has the best performance at 35 kW m −2 12-mm fibre-reinforced PP exhibitedthe lowest performance in comparison with 3-mm and continuous glass fibre reinforcement. Melic-anhydride (MA)-modified PP was found to increase the heat release rate (HRR) by up to 44% and time to ignition by up to 10% depending on the heat flux applied in comparison with unmodified PP. The glass fibre-reinforced composite made with MA-modified PP has 5–12% lower mean HRR and similar time to ignition in comparison with glass fibre composite made by unmodified PP. This suggests improved fibre adhesion plays a role of the fire performance of glass fibre-reinforced PP.
Facile Tuning of the Surface Energy of Cellulose Nanofibers for Nanocomposite Reinforcement
Publisher: American Chemical Society (ACS)
Date: 27-11-2018
Isolation of cellulose nanofibrils from Triodia pungens via different mechanical methods
Publisher: Springer Science and Business Media LLC
Date: 29-06-2015
The effect of formulation on the penetration of coated and uncoated zinc oxide nanoparticles into the viable epidermis of human skin in vivo
Publisher: Elsevier BV
Date: 06-2013
DOI: 10.1016/J.EJPB.2013.01.020
Abstract: The use of nanoparticulate zinc oxide (ZnO-NP) in sunscreens and other cosmetic products has raised public health concerns. The two key issues are the extent of exposure to ZnO-NP and the likely hazard after the application of ZnO-NP in sunscreen and cosmetic products to humans in vivo. Our aims were to assess exposure by the extent of ZnO-NP penetration into the viable epidermis and hazard by changes in the viable epidermal redox state for a number of topical products. Of particular interest is the role of the particle coating, formulation used, and the presence of any enhancers. Multiphoton tomography with fluorescence lifetime imaging microscopy (MPT-FLIM) was used to simultaneously observe ZnO-NP penetration and potential metabolic changes within the viable epidermis of human volunteers after topical application of various ZnO-NP products. Coated and uncoated ZnO-NP remained in the superficial layers of the SC and in the skin furrows. We observed limited penetration of coated ZnO-NP dispersed in a water-in-oil emulsion formulation, which was predominantly localized adjacent to the skin furrow. However, the presence of ZnO-NP in the viable epidermis did not alter the metabolic state or morphology of the cells. In summary, our data suggest that some limited penetration of coated and uncoated ZnO-NP may occur into viable stratum granulosum epidermis adjacent to furrows, but that the extent is not sufficient to affect the redox state of those viable cells.
Scalable processing of thermoplastic polyurethane nanocomposites toughened with nanocellulose
Publisher: Elsevier BV
Date: 10-2016
Evaluation of Coatings for Mg Alloys for Biomedical Applications
Publisher: Wiley
Date: 25-04-2014
Enhanced thermal stability of biomedical thermoplastic polyurethane with the addition of cellulose nanocrystals
Publisher: Wiley
Date: 18-02-2015
DOI: 10.1002/APP.41970
Correction to: Evaluation of properties and specific energy consumption of spinifex-derived lignocellulose fibers produced using different mechanical processes
Publisher: Springer Science and Business Media LLC
Date: 04-02-2020
Utilisation of Paunch Waste as a Natural Fibre in Biocomposites
Publisher: MDPI AG
Date: 06-09-2022
Abstract: Paunch is a fibrous solid residue consisting of partially digested feed from the stomachs of processed cattle. It is the largest untapped solid waste stream from animals at meat processing plants, and potentially a valuable source of fibres for the production of sustainable and potentially higher-value natural biocomposite materials. Paunch was obtained from the waste effluent of a red meat processing plant, and the fibre characteristics of the as-obtained material were studied and benchmarked against wood flour and ground buffel grass, with a view to evaluating the potential of paunch as a fibre for polymer composites. The ground paunch possessed a rough fibrous surface and fibre-like characteristics that were comparable to both wood flour and ground buffel grass, demonstrating their potential for use in composites. Without any pre-treatment or compatibilisation, composites of a representative biopolymer, poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and ground paunch were successfully produced for the first time via extrusion, with up to 50 wt% paunch content. Mechanical property analysis showed that, at 30 wt% content, PHBV/ground paunch composites yielded mechanical properties that were comparable to those of composites with ground buffel grass.
Corrosion of high purity Mg, Mg2Zn0.2Mn, ZE41 and AZ91 in Hank’s solution at 37 °C
Publisher: Elsevier BV
Date: 11-2011
Clay particles - potential of positron annihilation lifetime spectroscopy (PALS) for studying interlayer spacing
Publisher: IOP Publishing
Date: 2011
Layered double hydroxide nanoparticles incorporating terbium: Applicability as a fluorescent probe and morphology modifier
Publisher: Springer Science and Business Media LLC
Date: 08-01-2010
Biorenewable blends of polyamide‐11 and polylactide
Publisher: Wiley
Date: 19-07-2013
DOI: 10.1002/PEN.23692
Nanotechnology and the Dreamtime knowledge of spinifex grass
Publisher: Elsevier
Date: 2017
Atomic Layer Deposition of Metal Oxide on Nanocellulose for Enabling Microscopic Characterization of Polymer Nanocomposites
Publisher: Wiley
Date: 16-10-2018
Abstract: Analysis of cellulose nanocrystals (CNCs) at low volume fractions in polymer nanocomposites through conventional electron microscopy still remains a challenge due to insufficient contrast between CNCs and organic polymer matrices. Herein, a methodology for enhancing the contrast of CNC, through atomic layer deposition (ALD) of alumina (Al
Valorisation of technical lignin in rigid polyurethane foam: a critical evaluation on trends, guidelines and future perspectives
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1GC02744A
Abstract: Lignin is an inexpensive raw material that can be utilised in polymer industry. This review critically appraises the recent progress and provides framework for future developments in lignin valorisation into rigid polyurethane foam.
Influence of Different Nanocellulose Additives on Processing and Performance of PAN-Based Carbon Fibers
Publisher: American Chemical Society (ACS)
Date: 04-06-2019
Cover Feature: Potassium‐Ion Storage in Cellulose‐Derived Hard Carbon: The Role of Functional Groups (Batteries & Supercaps 9/2020)
Publisher: Wiley
Date: 14-08-2020
Lignocellulosic plant cell wall variation influences the structure and properties of hard carbon derived from sorghum biomass
Publisher: Elsevier BV
Date: 04-2022
Effect of different preparation routes on the structure and properties of rigid polyurethane‐layered silicate nanocomposites
Publisher: Wiley
Date: 23-08-2006
DOI: 10.1002/APP.24787
Engineering tissue tubes using novel multilayered scaffolds in the rat peritoneal cavity
Publisher: Wiley
Date: 15-01-2008
DOI: 10.1002/JBM.A.31781
Abstract: Our aim was to develop novel scaffolds to engineer tissue tubes of smooth muscle-like cells for autologous grafting. Small diameter tubular poly(lactic acid) scaffolds with randomly distributed, interconnected pores up to 100 mum were produced using a thermally induced phase separation method. The scaffolds were surface modified using various biomolecules via a layer-by-layer deposition technique, and implanted in the peritoneal cavities of rats. Histological analysis of scaffolds 3 weeks after implantation showed fully-developed tissue capsules on their outer surfaces, with macrophage-like cells present throughout the internal spaces. Surfaces coated in Matrigel supported the strongest cellular response whereas multilayer coatings with elastin, collagen I, collagen III, or chitosan outermost showed the lowest levels of cellular interaction. Although differences in capsule thickness and the presence or absence of cellularized layers on the inside and outside surfaces of the scaffolds were observed, none of these biomolecule coatings was able to overcome the foreign body response within the peritoneal cavity, even in the presence of a nonadsorptive HA undercoat.
Soft-Templated Synthesis of Sheet-Like Nanoporous Nitrogen-Doped Carbons for Electrochemical Supercapacitors
Publisher: Wiley
Date: 15-03-2019
In vitro fibroblast response to polyurethane organosilicate nanocomposites
Publisher: Wiley
Date: 09-11-2008
DOI: 10.1002/JBM.A.31667
Abstract: The term nanocomposite refers to organic:inorganic composites where one phase, typically the inorganic phase, has dimensions on the nanoscale. Several authors have noted the potential benefit of biomedical application of nanocomposite technology, and have suggested using quaternary ammonium compounds (QAC) as an organic modification to enhance dispersion of nanoparticles within polymer matrices. This study aimed to examine fibroblast responses in vitro to a range of nanocomposites using different organic modifiers. Composite materials were prepared from a polyether urethane (PEU) and various unmodified and organically modified montmorillonite (MMT) nanoparticles. QAC and amino undecanoic acid (AUA) modified-MMT were added to PEU at loadings ranging from approximately 1 to 15 wt %. Composites with organically modified QAC and AUA particles displayed partially exfoliated and intercalated silicate morphology, respectively. Nanocomposites showed increases in ultimate tensile properties for materials with lower QACMMT loadings. However QAC was shown to significantly inhibit cell growth following release from PEU-QACMMT under extraction conditions mimicking those of the physiological environment. Materials containing silicate modified using AUA were cytocompatible. The results of this study suggest that QAC may be unsuitable as organic modifiers for nanoparticles destined for biomedical use. Alternative modifiers based on AUA confer equivalent dispersion and are of low toxicity.
Radiation-induced grafting of acrylic acid onto expanded poly(tetrafluoroethylene) membranes
Publisher: Elsevier BV
Date: 12-2012
Potassium-Ion Storage in Cellulose-Derived Hard Carbon: The Role of Functional Groups
Publisher: Wiley
Date: 08-07-2020
Easily deconstructed, high aspect ratio cellulose nanofibres from Triodia pungens; An abundant grass of Australia's arid zone
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA02936H
Abstract: The production of high aspect ratio cellulose nanofibres without resorting to very harsh mechanical and/or chemical processing steps remains a challenge that hinders progress in the fast-moving nanocellulose field.
Fluoromica nanoparticle cytotoxicity in macrophages decreases with size and extent of uptake.
Publisher: Informa UK Limited
Date: 03-2015
DOI: 10.2147/IJN.S80655
Reinforcement of natural rubber latex using lignocellulosic nanofibers isolated from spinifex grass
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7NR02632C
Abstract: Remnant lignin and hemicellulose in the cellulose nanofibre (CNF) and a deep-eutectic-solvent pretreatment on CNF can enhace the tensile strength and toughness or natural rubber nanocomposites.
Morphology and properties of thermoplastic polyurethane composites incorporating hydrophobic layered silicates
Publisher: Wiley
Date: 22-04-2005
DOI: 10.1002/APP.21718
Indigenous and modern biomaterials derived from Triodia (‘spinifex’) grasslands in Australia
Publisher: CSIRO Publishing
Date: 2012
DOI: 10.1071/BT11285
Abstract: Plant-derived fibres and resins can provide biomaterials with environmental, health and financial benefits. Australian arid zone grasses have not been explored as sources of modern biomaterials including building materials. Triodia grasslands are a dominant vegetation type in the arid and semiarid regions of Australia covering a third of the continent. Of the 69 identified Triodia species, 26 produce resin from specialised cells in the outer leaf epidermis. In Aboriginal culture, Triodia biomass and resin were valued for their usefulness in cladding shelters and as a hafting agent. Since European settlement, Triodia grasslands have been used for cattle grazing and burning is a common occurrence to improve pasture value and prevent large-scale fires. Although Triodia grasslands are relatively stable to fires, more frequent and large-scale fires impact on other fire sensitive woody and herbaceous species associated with Triodia and invasion of exotic weeds resulting in localised changes in vegetation structure and composition. The extent and change occurring in Triodia grasslands as a result of altered land-use practices, fire regimes, and changing climate warrant careful consideration of their future management. Localised harvesting of Triodia grasslands could have environmental benefits and provide much needed biomaterials for desert living. Research is underway to evaluate the material properties of Triodia biomass and resin in the context of Indigenous and western scientific knowledge. Here, we review uses of Triodia and highlight research needs if sustainable harvesting is to be considered.
Effect of supercritical carbon dioxide on the loading and release of model drugs from polyurethane films: Comparison with solvent casting
Publisher: Wiley
Date: 02-12-2014
Vibrational spectroscopic studies of laboratory scale polymer melt processing: Application to a thermoplastic polyurethane nanocomposite
Publisher: Elsevier BV
Date: 09-2009
Cryptic Epitopes of Albumin Determine Mononuclear Phagocyte System Clearance of Nanomaterials
Publisher: American Chemical Society (ACS)
Date: 27-03-2014
DOI: 10.1021/NN405830G
Abstract: While plasma proteins can influence the physicochemical properties of nanoparticles, the adsorption of protein to the surface of nanomaterials can also alter the structure and function of the protein. Here, we show that plasma proteins form a hard corona around synthetic layered silicate nanoparticles (LSN) and that one of the principle proteins is serum albumin. The protein corona was required for recognition of the nanoparticles by scavenger receptors, a major receptor family associated with the mononuclear phagocyte system (MPS). Albumin alone could direct nanoparticle uptake by human macrophages, which involved class A but not class B scavenger receptors. Upon binding to LSN, albumin unfolded to reveal a cryptic epitope that could also be exposed by heat denaturation. This work provides an understanding of how albumin, and possibly other proteins, can promote nanomaterial recognition by the MPS without albumin requiring chemical modification for scavenger receptor recognition. These findings also demonstrate an additional function for albumin in vivo.
Nafion-MPMDMS nanocomposite membranes with low methanol permeability
Publisher: Elsevier BV
Date: 04-2007
Effect of the average soft-segment length on the morphology and properties of segmented polyurethane nanocomposites
Publisher: Wiley
Date: 28-07-2006
DOI: 10.1002/APP.23347
Impact of controlled particle size nanofillers on the mechanical properties of segmented polyurethane nanocomposites
Publisher: Inderscience Publishers
Date: 2007
The selective cleavage of lignin aliphatic C–O linkages by solvent-assisted fast pyrolysis (SAFP)
Publisher: Springer Science and Business Media LLC
Date: 04-2019
SPEEK/cSMM membrane for simultaneous electricity generation and wastewater treatment in microbial fuel cell
Publisher: Wiley
Date: 19-01-2015
DOI: 10.1002/JCTB.4622
Optimisation of resin extraction from an Australian arid grass ‘Triodia pungens’ and its preliminary evaluation as an anti-termite timber coating
Publisher: Elsevier BV
Date: 08-2014
Effects of the growth environment on the yield and material properties of nanocellulose derived from the Australian desert grass Triodia
Publisher: Elsevier BV
Date: 12-2018
Interaction of Human Arylamine N-Acetyltransferase 1 with Different Nanomaterials
Publisher: American Society for Pharmacology & Experimental Therapeutics (ASPET)
Date: 17-12-2013
Abstract: Humans are exposed to nanoparticles in the environment as well as those in nanomaterials developed for biomedical applications. However, the safety and biologic effects of many nanoparticles remain to be elucidated. Over the past decade, our understanding of the interaction of proteins with various nanomaterials has grown. The protein corona can determine not only how nanoparticles interact with cells but also their biologic effects and toxicity. In this study, we describe the effects that several different classes of nanoparticles exert on the enzymatic activity of the cytosolic protein human arylamine N-acetyltransferase 1 (NAT1), a drug-metabolizing enzyme widely distributed in the body that is also responsible for the activation and detoxification of known carcinogens. We investigated three metal oxides (zinc oxide, titanium dioxide, and silicon dioxide), two synthetic clay nanoparticles (layered double hydroxide and layered silicate nanoparticles), and a self-assembling thermo-responsive polymeric nanoparticle that differ in size and surface characteristics. We found that the different nanoparticles induced very different responses, ranging from inhibition to marked enhancement of enzyme activity. The layered silicates did not directly inactivate NAT1, but was found to enhance substrate-dependent inhibition. These differing effects demonstrate the multiplicity of nanoparticle-protein interactions and suggest that enzyme activity may be compromised in organs exposed to nanoparticles, such as the lungs or reticulo-endothelial system.
Processing and rheological properties of polyol/cellulose nanofibre dispersions for polyurethanes
Publisher: Elsevier BV
Date: 08-2022
Engineered nanofillers: impact on the morphology and properties of biomedical thermoplastic polyurethane nanocomposites
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2RA21420B
Are there generalizable trends in the release of airborne synthetic clay nanoparticles from a jet milling process?
Publisher: Taiwan Association for Aerosol Research
Date: 2015
Reduced Graphene Oxide (rGO) Prepared by Metal-Induced Reduction of Graphite Oxide: Improved Conductive Behavior of a Poly(methyl methacrylate) (PMMA)/rGO Composite
Publisher: Wiley
Date: 19-07-2019
High-pressure freezing/freeze substitution and transmission electron microscopy for characterization of metal oxide nanoparticles within sunscreens
Publisher: Future Medicine Ltd
Date: 04-2012
DOI: 10.2217/NNM.11.149
Abstract: Aims: To date, the description of a single, suitable method to observe in detail metal oxide nanoparticles in situ within sunscreens is currently lacking, despite growing concern as to how they interact with humans. This study explores the usefulness of transmission electron microscopy to characterize the nanoparticles in sunscreens. Materials & methods: High-pressure freezing then freeze substitution was used to prepare resin-embedded commercial sunscreen s les, and ultrathin sections of these were observed with transmission electron microscopy. Conventional room temperature processing for resin embedding was also trialed. Results: High-pressure frozen/freeze substituted s les provided clear visualization of the size and shape of the nanoparticles and agglomerates and allowed further characterization of the composition and crystal form of the metal oxides, while conventionally processed chemically fixed s les were subject to distribution/agglomeration artifacts. Conclusion: Transmission electron microscopy of high-pressure frozen/freeze substituted s les is an ideal method to completely observe metal oxide nanoparticles in situ in sunscreens.
Erratum to “Optimization of resin extraction from an Australian arid grass ‘Triodia pungens’ and its preliminary evaluation as an anti-termite timber coating” [Ind. Crops Prod. 59 (2014) 241–247]
Publisher: Elsevier BV
Date: 05-2015
Improvement of the wet tensile properties of nanostructured hydroxyapatite and chitosan biocomposite films through hydrophobic modification
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C0JM03080E
Sorghum biomass-derived porous carbon electrodes for capacitive deionization and energy storage
Publisher: Elsevier BV
Date: 2021
Toughening of natural rubber nanocomposites by the incorporation of nanoscale lignin combined with an industrially relevant leaching process
Publisher: Elsevier BV
Date: 2021
Morphology and properties of thermoplastic polyurethane nanocomposites incorporating hydrophilic layered silicates
Publisher: Elsevier BV
Date: 03-2004
Composites of poly(ethylene terephthalate) and multi-walled carbon nanotubes
Publisher: Elsevier
Date: 2011
Segmented Polyurethane Nanocomposites: Impact of Controlled Particle Size Nanofillers on the Morphological Response to Uniaxial Deformation
Publisher: American Chemical Society (ACS)
Date: 26-07-2005
DOI: 10.1021/MA0508911
Magnesium Corrosion in Different Solutions
Publisher: Trans Tech Publications, Ltd.
Date: 06-2011
DOI: 10.4028/WWW.SCIENTIFIC.NET/MSF.690.369
Abstract: The corrosion mechanism of Mg alloys in Hank’s solution was elucidated by comparing the corrosion of typical Mg alloys (AZ91, ZE41 and Mg2Zn0.2Mn) and high purity Mg in Hank’s solution at room temperature and in 3% NaCl saturated with Mg(OH) 2 . Corrosion was characterised by the evolved hydrogen and the surfaces after the immersion tests. Corrosion in Hank’s solution was weakly influenced by microstructure in contrast to corrosion in the 3% NaCl solution, where second phases cause strong micro-galvanic acceleration. This is attributed to the formation of a more protective surface film in Hank’s solution, causing extra resistance between the alpha-Mg matrix and the second phase. The incubation period in Hank’s solution was alloy dependent.
Assessing cellulose micro/nanofibre morphology using a high throughput fibre analysis device to predict nanopaper performance
Publisher: Springer Science and Business Media LLC
Date: 09-02-2022
DOI: 10.1007/S10570-021-04405-5
Abstract: Characterising cellulose nanofibre (CNF) morphology has been identified as a grand challenge for the nanocellulose research field. Direct techniques for CNF morphology characterisation exhibit various difficulties related to the material network structure and equipment cost, while indirect techniques that investigate fibre-light interaction, fibre-solvent interaction, fibre-fibre interaction, or specific fibre surface area involve relatively facile methods but may be more unreliable. Nanopaper mechanical testing is a prevalent metric for assessing fibre-fibre interaction, but is an off-line, time-consuming, and destructive methodology. In this study, an optical fibre morphology analyser (MorFi, Techpap) was employed as an on-line, high throughput, fast turnaround tool to assess micro/nanofibre pulp morphology and predict the properties of nanopaper material. Correlation analysis identified fibre content and fibre kink properties as most correlated with nanopaper strength and toughness, while fibre width and coarseness were most inversely correlated with nanopaper performance. Principal component analysis (PCA) was employed to visualise interdependent morphological and mechanical data. Subsequently, two data driven statistical models—multiple linear regression (MLR) and machine learning based support vector regression (SVR)—were established to predict nanopaper properties from fibre morphology data, with SVR generating a more accurate prediction across all nanopaper properties (NRMSE = 0.13–0.33) compared to the MLR model (NRMSE = 0.33–0.51). This study highlights that statistical methods are useful to disentangle and visualise interdependent morphological data from an on-line fibre analysis device, while regression models are also capable of predicting paper mechanical properties from CNF s les even though these devices do not operate at nanoscale resolution. Graphical abstract
Photochemistry of low‐density polyethylene–montmorillonite composites
Publisher: Wiley
Date: 29-12-2008
DOI: 10.1002/APP.29385
Trends in the production of cellulose nanofibers from non-wood sources
Publisher: Springer Science and Business Media LLC
Date: 09-11-2020
Isothermal differential scanning calorimetry analysis of the anionic polymerisation of polyamide-6: Separation by dual asymmetric gaussians
Publisher: Elsevier BV
Date: 12-2020
Impact of Controlled Hydrophobicity of the Organically Modified Silicates on the Properties of Biomedical Thermoplastic Polyurethane (TPU) Nanocomposites
Publisher: Trans Tech Publications, Ltd.
Date: 09-2013
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.795.9
Abstract: The impact of nanofiller surface modifications and hydrophobicity on the morphology and mechanical properties of the biomedical TPU nanocomposites was studied. We show that incorporating nanofillers with higher hydrophobicity promotes better dispersion of nanofiller in TPU matrix due to greater interaction between the nanofiller and the hydrophobic PDMS soft segment in this ElastEon TPU system. The nanocomposite with the most hydrophobic surface modification demonstrates the best nanofiller dispersion and intercalation and hence resulted in an overall best mechanical and thermomechanical properties when incorporated in 2 wt%. These findings show that the polarity matching between the TPU and the nanofiller determines the nanofiller-TPU interactions and thus the mechanical properties of the produced nanocomposites.
A cleaner processing approach for cellulose reinforced thermoplastic polyurethane nanocomposites
Publisher: Wiley
Date: 26-01-2022
DOI: 10.1002/PEN.25899
Abstract: In a manner of addressing challenges in scalable processing of thermoplastic polyurethane (TPU) nanocomposites through extrusion methods, this study reports a very clean processing approach of incorporating cellulose nanocrystal (CNC) into a TPU matrix, with no acid or organic‐solvents usage. It involves a mechanical deconstruction of microcrystalline cellulose (MCC) into nanoscale particles in water and polyol through scalable bead‐milling, vacuum drying, and followed by twin‐screw reactive extrusion with isocyanate and chain extender. The thermal stability of CNC was higher than that of typically acid‐hydrolyzed CNC and suitable for processing with the precursors of TPU at typical processing temperature range (175–190°C). The CNC incorporation at very low loadings (0.5, 0.8 wt%) through this methodology resulted in substantial enhancements in tensile properties (for ex le, up to 28% in strength and toughness) without any significant stiffening effect. Moreover, the nanocomposites retained elastic properties, including elongation at break (%), resilience, and creep resistance. Their chemical properties and thermal transitions were also found to support the retained thermoplastic behavior while improving mechanical performance.
Polyethylene‐layered silicate nanocomposites for rotational moulding
Publisher: Wiley
Date: 27-10-2003
DOI: 10.1002/PI.1288
The in vivo and in vitro corrosion of high-purity magnesium and magnesium alloys WZ21 and AZ91
Publisher: Elsevier BV
Date: 10-2013
Electrochemical Characteristics of Cobaltosic Oxide in Organic Electrolyte According to Bode Plots: Double‐Layer Capacitance and Pseudocapacitance
Publisher: Wiley
Date: 02-05-2019
Cellulose Nanofibers as Rheology Modifiers and Enhancers of Carbonization Efficiency in Polyacrylonitrile
Publisher: American Chemical Society (ACS)
Date: 07-03-2017
Benchmarking the Production of Cellulose Nanofibres: Biomass Feedstock, Mechanical Processing, and Nanopaper Performance
Publisher: Springer Science and Business Media LLC
Date: 07-12-2022
Chemorheological studies on a thermoset PU/clay nanocomposite system
Publisher: Informa UK Limited
Date: 2007
An organic matrix-mediated processing methodology to fabricate hydroxyapatite based nanostructured biocomposites
Publisher: Royal Society of Chemistry (RSC)
Date: 2009
DOI: 10.1039/B9NR00062C
Abstract: An amorphous calcium phosphate precursor phase, which forms by adding orthophosphoric acid to a calcium hydroxide suspension, is transformed into crystalline hydroxyapatite by introducing polymer solutions. The nanostructured composite films formed by a solvent casting technique from the concentrated hybrid suspension are characterised for structure and mechanical properties.
In vitro mineralisation of grafted ePTFE membranes carrying carboxylate groups
Publisher: Elsevier BV
Date: 03-2017
Blends of biorenewable polyamide-11 and polyamide-6,10
Publisher: Elsevier BV
Date: 12-2013
Thermal stability analysis of organo-silicates, using solid phase microextraction techniques
Publisher: Elsevier BV
Date: 05-2005
Double-Layered Modified Separators as Shuttle Suppressing Interlayers for Lithium-Sulfur Batteries
Publisher: American Chemical Society (ACS)
Date: 18-12-2019
Abstract: The shuttling phenomena in lithium-sulfur batteries lead to drastic attenuation of the capacity. This can be suppressed effectively by modifying the separator. Herein, a double-layered separator composed of a macroporous polypropylene (PP) matrix layer and an arrayed poly(methyl methacrylate) (PMMA) microsphere retarding layer is designed as the separator for lithium-sulfur batteries. A sulfur positive electrode with the PP/PMMA separator exhibits a high initial capacity of 1100.10 mAh g
In vitro biostability of poly(dimethyl siloxane/hexamethylene oxide)-based polyurethane/layered silicate nanocomposites
Publisher: Elsevier BV
Date: 09-2013
DOI: 10.1016/J.ACTBIO.2013.05.021
Abstract: We have prepared a number of silicone-based thermoplastic polyurethane (TPU) nanocomposites and demonstrated an enhancement of in vitro biostability against metal-ion-induced oxidation for potential use in long-term implantable medical devices. Organoclays based on both low-aspect-ratio hectorites and high-aspect-ratio fluoromicas were evaluated after being dual-modified with two quaternary alkyl ammonium salts with differing degrees of polarity. The resultant nanocomposites were tested for in vitro biostability using physiologically relevant oxidizing conditions. Subsequently, the effects of oxidative treatment on the surface degradation and bulk mechanical integrity of the nanocomposites were investigated and compared with the parent TPUs to identify nanocomposites with the most desirable features for long-term implantation. Here, we demonstrate that the low-aspect-ratio organohectorite was delaminated and well dispersed in the nanocomposites. Importantly, these factors gave rise to the enhanced oxidative stability. In addition, the mechanical properties of all nanocomposites were less adversely affected by the oxidative treatment compared to their parent TPUs. These results suggest the potential for improved mechanical integrity and biostability when suitable dual modified organoclays are incorporated in a silicone-based TPU.
Novel Methodology to Visualize Biomass Processing Sustainability & Cellulose Nanofiber Product Quality
Publisher: American Chemical Society (ACS)
Date: 09-03-2022
Mechanical properties of polyamide 11 reinforced with cellulose nanofibres from Triodia pungens
Publisher: Springer Science and Business Media LLC
Date: 16-02-2018
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