Formation and stability of polymerically stabilized colloids. This project will bring economic, medical and environmental benefits, with improved product performance and manufacturing processes for everyday industrial items relevant to a large industrial sector with significant employment in Australia: inks and paints (for example, surface coatings that can be applied more rapidly without clogging the jets); better means of preventing the fouling of industrial membranes; and improved materials f ....Formation and stability of polymerically stabilized colloids. This project will bring economic, medical and environmental benefits, with improved product performance and manufacturing processes for everyday industrial items relevant to a large industrial sector with significant employment in Australia: inks and paints (for example, surface coatings that can be applied more rapidly without clogging the jets); better means of preventing the fouling of industrial membranes; and improved materials for biomedical applications, with more desirable interactions between living cells and body fluids. These advances will also speed the replacement of solvent-based lacquer paints - detrimental to both environment and user - with water-based products of high quality.Read moreRead less
Enhanced pigment weathering resistance by coating with high dielectric ceramic. The partner company, Tiwest, based in Western Australia, is a major contributor to the economy, and earns more than $A400m annually in exports. It is the only company in the world that mines, separates, refines and manufactures titania products, including pigments, in one region. The current post-titania particle formation wet-coating process, however, presents a major capital and recurrent cost and necessitates a pi ....Enhanced pigment weathering resistance by coating with high dielectric ceramic. The partner company, Tiwest, based in Western Australia, is a major contributor to the economy, and earns more than $A400m annually in exports. It is the only company in the world that mines, separates, refines and manufactures titania products, including pigments, in one region. The current post-titania particle formation wet-coating process, however, presents a major capital and recurrent cost and necessitates a pigment regrind stage. The research will investigate the development of a highly durable dry-coated pigment utilising a novel high dielectric coating. This development has the potential to ensure the partner company's future competitiveness through reduced processing costs and improved product performance.Read moreRead less
Novel Nanofibre-Templated Nanotubes Prepared by Using ABA Block Copolymers. The aim of this project is to prepare new, highly functional nanomaterials using layer-by-layer assembly of polyelectrolytes on a three-dimensional template. Using this approach, a core-shell fibre is initially prepared by alternate deposition of oppositely charged materials onto an electrospun fibre template. The initial fibre can then be dissolved to give hollow nanotubes. New block copolymers, incorporating both charg ....Novel Nanofibre-Templated Nanotubes Prepared by Using ABA Block Copolymers. The aim of this project is to prepare new, highly functional nanomaterials using layer-by-layer assembly of polyelectrolytes on a three-dimensional template. Using this approach, a core-shell fibre is initially prepared by alternate deposition of oppositely charged materials onto an electrospun fibre template. The initial fibre can then be dissolved to give hollow nanotubes. New block copolymers, incorporating both charged and uncharged domains, will be used in the assembly, in order to design tubes with novel properties. The behaviour of these tubes under a variety of pH and solvent conditions will then be examined, and the tubes characterized using various microscopy techniques.Read moreRead less
Electronic and Optical Properties of Doped Titanium Dioxide. Titanium dioxide, is widely used as a white pigment, owing to its high refractive index, second, only after diamond. Yellowing of rutile pigment particles, observed on prolonged exposure to sunlight, is a serious problem that pigment manufacturers would like to overcome. It is proposed that aluminium-doping of rutile limits this discolouration by altering the electronic structure of the rutile particles. This project seeks to identify ....Electronic and Optical Properties of Doped Titanium Dioxide. Titanium dioxide, is widely used as a white pigment, owing to its high refractive index, second, only after diamond. Yellowing of rutile pigment particles, observed on prolonged exposure to sunlight, is a serious problem that pigment manufacturers would like to overcome. It is proposed that aluminium-doping of rutile limits this discolouration by altering the electronic structure of the rutile particles. This project seeks to identify the specific electronic cause of the yellowing process, the nature of the Al defect,it's effect on the electronic structure of rutile, and the electronic perturbations that may occur when other dopants are used.Read moreRead less
STABILISATION OF TITANIA PIGMENTS FOR IMPROVED WATER-BASED PAINT APPLICATIONS. This project aims to improve the stability and optical properties of titania pigments in water-based paints. Tailored dispersing agents will be used to stabilise pigments in paints in both the wet and dry state. Enhanced understanding of the dispersing agents interaction with the titania pigment surface and the subsequent stability of the pigment in dry paint films will allow advances in water-based paint stability. T ....STABILISATION OF TITANIA PIGMENTS FOR IMPROVED WATER-BASED PAINT APPLICATIONS. This project aims to improve the stability and optical properties of titania pigments in water-based paints. Tailored dispersing agents will be used to stabilise pigments in paints in both the wet and dry state. Enhanced understanding of the dispersing agents interaction with the titania pigment surface and the subsequent stability of the pigment in dry paint films will allow advances in water-based paint stability. This understanding facilitates continued movement away from solvent-based paints required by environmental and health legislation. The potential growth in market share for the Australian pigment industry is in excess of $50M pa.Read moreRead less
The effect of de-gassing on the dispersion and stability of emulsions and colloidal solutions. Although it is widely accepted that oil and water will not mix, the reverse has recently been found to occur (by the applicant) under the unusual conditions of complete de-gassing. This discovery has opened up new areas for investigation and for the development of new processes and products. Hydrocarbon oils and hydrophobic powders can now be readily dispersed in water without the use of additives. Ho ....The effect of de-gassing on the dispersion and stability of emulsions and colloidal solutions. Although it is widely accepted that oil and water will not mix, the reverse has recently been found to occur (by the applicant) under the unusual conditions of complete de-gassing. This discovery has opened up new areas for investigation and for the development of new processes and products. Hydrocarbon oils and hydrophobic powders can now be readily dispersed in water without the use of additives. However, the mechanisms involved have not yet been elucidated and it is the aim of this project to understand the process and develop potential commercial applications.Read moreRead less
A new angle on the coalescence of drops. Many processes depend on what happens when drops and/or bubbles collide with each other, or with the surfaces of other materials. Examples include inkjet printing, agricultural spraying, spray coating of paints, pharmaceutical formulation, stability of cosmetics and foodstuffs, formation of froths and foams, and flow of bubbly liquids. To control these processes, we need to understand how and why drops sometimes do and sometimes do not coalesce with each ....A new angle on the coalescence of drops. Many processes depend on what happens when drops and/or bubbles collide with each other, or with the surfaces of other materials. Examples include inkjet printing, agricultural spraying, spray coating of paints, pharmaceutical formulation, stability of cosmetics and foodstuffs, formation of froths and foams, and flow of bubbly liquids. To control these processes, we need to understand how and why drops sometimes do and sometimes do not coalesce with each other or adhere to surfaces. The knowledge gained in this project will enable improvements to be made in the efficiency of processes such as those listed above.Read moreRead less
Nanoparticles with designed morphology for surface-coating applications. Significantly improved water-based paints, with zero volatile organic content and organic opacifiers, are highly desirable for environmental and health reasons. The science needed to produce such paints has been persistently elusive. USyd and Dulux will collaborate to achieve these paints by using Australian-developed platform technologies that allow polymer architecture to be controlled at molecular and nanoscale levels. T ....Nanoparticles with designed morphology for surface-coating applications. Significantly improved water-based paints, with zero volatile organic content and organic opacifiers, are highly desirable for environmental and health reasons. The science needed to produce such paints has been persistently elusive. USyd and Dulux will collaborate to achieve these paints by using Australian-developed platform technologies that allow polymer architecture to be controlled at molecular and nanoscale levels. This will give us the means to make structured nanoparticles with morphologies that had been regarded as unachievable, and that are the key to dispensing with harmful ingredients in paints.Read moreRead less
Mechanistic investigation of fluorinated coatings for stone preservation. We will investigate mechanisms governing the synthesis of a latex used for stone preservation. This latex is made from novel and unusual starting materials, and will be the most complex system for which mechanisms have been investigated. We will redesign the synthesis procedure to control particle size and composition of the functional species at the particle surface. This will enable both particle size and surface composi ....Mechanistic investigation of fluorinated coatings for stone preservation. We will investigate mechanisms governing the synthesis of a latex used for stone preservation. This latex is made from novel and unusual starting materials, and will be the most complex system for which mechanisms have been investigated. We will redesign the synthesis procedure to control particle size and composition of the functional species at the particle surface. This will enable both particle size and surface composition to be tailored as desired. The results will be used to investigate the influence of these quantities on interactions between particles and sandstone surfaces. The outcomes will be used by the industrial partner to devise improved protective coatings for stone surfaces in Australian conditions.Read moreRead less
Nanoengineered Colloids and thin films through self-assembly with potential applications in Bioscince and Nanotechnology. The proposed research program will focus on the preparation, characterisation and application of novel, small (nanometer size) particles and thin (micrometer thick)films derived from such particles. These new and advanced materials will be prepared by usinf a recently developed, highly versatile and facile technology to coat particles in solution. The strategy to be used en ....Nanoengineered Colloids and thin films through self-assembly with potential applications in Bioscince and Nanotechnology. The proposed research program will focus on the preparation, characterisation and application of novel, small (nanometer size) particles and thin (micrometer thick)films derived from such particles. These new and advanced materials will be prepared by usinf a recently developed, highly versatile and facile technology to coat particles in solution. The strategy to be used entails the step-by-step construction of well-defined layers of different composition on particles and flat surfaces, thereby allowing unprecendented control over the material properties and function. This will provide new avenues for the application of nanoscale materials in biotechnology and nanotechnology.Read moreRead less