A5062458918- Muon and positron interactions and applications
- Membrane Separation and Gas Transport
- Metal-Organic Frameworks: Synthesis and Applications
- Polymer crystallization and properties
- Covalent Organic Framework Applications
- Graphene research and applications
- Advanced Battery Materials and Technologies
- Synthesis and properties of polymers
- Membrane Separation Technologies
- Aluminum Alloy Microstructure Properties
- biodegradable polymer synthesis and properties
- Fuel Cells and Related Materials
- Aluminum Alloys Composites Properties
- Zeolite Catalysis and Synthesis
- Polymer Nanocomposites and Properties
- Recycling and Waste Management Techniques
- Chemical Synthesis and Characterization
- Membrane-based Ion Separation Techniques
- Silk-based biomaterials and applications
- Advancements in Battery Materials
- Microstructure and mechanical properties
- Material Dynamics and Properties
- Mesoporous Materials and Catalysis
- Gas Sensing Nanomaterials and Sensors
- Glass properties and applications
CSIRO Manufacturing
2015-2024
Commonwealth Scientific and Industrial Research Organisation
2012-2024
NIHR Exeter Clinical Research Facility
2023
University of Exeter
2023
Duke University
1986-2020
Oxford University Press (United Kingdom)
2020
Health Sciences and Nutrition
2008-2019
Kyoto University
2017-2019
Clayton Foundation
2014-2016
Victoria University
1996-2016
Abstract Enhancing the robustness of functional biomacromolecules is a critical challenge in biotechnology, which if addressed would enhance their use pharmaceuticals, chemical processing and biostorage. Here we report novel method, inspired by natural biomineralization processes, provides unprecedented protection encapsulating them within class porous materials termed metal-organic frameworks. We show that proteins, enzymes DNA rapidly induce formation protective framework coatings under...
Polymer nanocomposites continue to receive tremendous attention for application in areas such as microelectronics, organic batteries, optics, and catalysis. We have discovered that physical dispersion of nonporous, nanoscale, fumed silica particles glassy amorphous poly(4-methyl-2-pentyne) simultaneously surprisingly enhances both membrane permeability selectivity large molecules over small permanent gases. These highly unusual property enhancements, contrast results obtained conventional...
Within a polymer film, free-volume elements such as pores and channels typically have wide range of sizes topologies. This broad element compromises polymer's ability to perform molecular separations. We demonstrated structures in dense vitreous polymers that enable outstanding ionic transport separation performance surpasses the limits conventional polymers. The unusual microstructure these materials can be systematically tailored by thermally driven segment rearrangement. Free-volume...
Subnanometer metal organic framework pores can selectively transport alkali ions of the same valence and similar sizes.
Separation of molecules based on molecular size in zeolites with appropriate pore aperture dimensions has given rise to the definition "molecular sieves" and been basis for a variety separation applications. We show here that class chabazite zeolites, what appears be sieving" dimension is actually difference ability guest molecule induce temporary reversible cation deviation from center apertures, allowing exclusive admission certain molecules. This new mechanism discrimination permits...
Abstract Aging in super glassy polymers such as poly(trimethylsilylpropyne) (PTMSP), poly(4‐methyl‐2‐pentyne) (PMP), and with intrinsic microporosity (PIM‐1) reduces gas permeabilities limits their application gas‐separation membranes. While are initially very porous, ultra‐permeable, they quickly pack into a denser phase becoming less porous permeable. This age‐old problem has been solved by adding an ultraporous additive that maintains the low density, initial stage of through absorbing...
The high and regular porosity of metal–organic frameworks (MOFs) provides exceptional properties suitable for technological applications. increasing interest the scientific community is based on exploration these advantageous industrial Pure MOFs are specifically designed to offer a huge surface area; such specific area has been explored exploited gas storage, separation, or catalysis in variety chemical processes. A different promising trend aims combine with extrinsic functionalities as...
A critical materials challenge over the next quarter century is sustainable use and management of world's natural resources, particularly scarcest them. Chemistry's ability to get more from less epitomized by porous coordination polymers, also known as metal-organic frameworks (MOFs), which a minimum amount material build maximum surface areas with fine control pore size. Their large specific area tunable porosity make MOFs useful for applications including small-molecule sensing,...
Conversion of hydroxyl-containing polyimides into polybenzoxazole can be achieved by thermal rearrangement the aromatic polymer chain with decarboxylation at elevated temperature. Synthetic methods to prepare polyimide precursors are important for resulting thermally rearranged (TR) membranes. Here, we report on effect several imidization properties TR Thermal and chemical imidizations most common routes polyimides, solution using an azeotrope is also widely used, especially obtain soluble...
With controlled nanometre-sized pores and surface areas of thousands square metres per gram, metal-organic frameworks (MOFs) may have an integral role in future catalysis, filtration sensing applications. In general, for MOF-based device fabrication, well-organized or patterned MOF growth is required, thus conventional synthetic routes are not suitable. Moreover, to expand their applicability, the introduction additional functionality into MOFs desirable. Here, we explore use nanostructured...
Abstract Biological fluoride ion channels are sub-1-nanometer protein pores with ultrahigh F − conductivity and selectivity over other halogen ions. Developing synthetic biological-level is highly desirable for separations such as water defluoridation, but it remains a great challenge. Here we report fabricated from zirconium-based metal-organic frameworks (MOFs), UiO-66-X (X = H, NH 2 , N + (CH 3 ) ). These MOFs comprised of nanometer-sized cavities connected by sub-1-nanometer-sized...
Abstract Porosity loss, also known as physical aging, in glassy polymers hampers their long term use gas separations. Unprecedented interactions of porous aromatic frameworks (PAFs) with these offer the potential to control and exploit aging for drastically enhanced separation efficiency. PAF‐1 is used archetypal polymer intrinsic microporosity (PIM), PIM‐1, achieve three significant outcomes. 1) hydrogen permeability by 375 % 5500 Barrer. 2) Physical controlled causing selectivity H 2 over...
Gas separation membranes are one of the lowest energy technologies available for carbon dioxide from flue gas. Key to handling immense scale this is maximised membrane permeability at sufficient selectivity CO2 over N2. For first time it revealed that metals can be post-synthetically exchanged in MOFs drastically enhance gas transport performance membranes. Ti-exchanged UiO-66 have been found triple without a loss due several effects include increased affinity and stronger interactions...
To date, only several microporous, and even fewer nanoporous, glasses have been produced, always via post synthesis acid treatment of phase separated dense materials, e.g. Vycor glass. In contrast, high internal surface areas are readily achieved in crystalline such as metal-organic frameworks (MOFs). It has recently discovered that a new family melt quenched can be produced from MOFs, though they thus far lacked the accessible intrinsic porosity their precursors. Here, we report first...
Abstract Lithium is mainly extracted from brine and ores; however, current lithium mining methods require large amounts of chemicals, discharge many wastes, can have serious environmental repercussions. Metal–organic framework (MOF)‐based membranes shown great potential in extraction due to their uniform pore sizes, high porosities, rich host–guest chemistry compared other materials. In this review, the processes disadvantages technologies are introduced. The structure features corresponding...
In contrast to the performance of traditional filled polymer systems, penetrant permeability coefficients in high-free-volume, glassy poly(4-methyl-2-pentyne) (PMP) increase systematically and substantially with increasing concentration nonporous, nanoscale fumed silica (FS). For instance, PMP containing 40 wt % FS methane is 2.3 times higher than that unfilled polymer. Gas vapor uptake PMP/FS nanocomposites essentially unaffected by presence up FS, while diffusion regularly filler content....
Poly(vinyl alcohol), PVOH, films have been studied as a function of water content. The states present in the polymer (bound or free) characterized and are effects content (and hence state) on free volume, chain mobility, glass transition (Tg) behavior by positron annihilation lifetime spectroscopy, 13C solid state nuclear magnetic resonance, dynamic mechanical analysis. addition approximately 30 wt % results marked increase volume cavity size mobility corresponding decrease Tg. is molecular,...
Penetrant permeability coefficients in high-free-volume, glassy poly(1-trimethylsilyl-1-propyne) [PTMSP] increase systematically with increasing concentration of nonporous, nanoscale fumed silica [FS]. For example, the PTMSP containing 40 wt % FS to methane is 180% higher than that unfilled polymer. Gas and vapor solubility nanocomposites are unaffected by at concentrations up 50 %. diffusion content, enhanced due this rise diffusivity. These results qualitatively similar behavior previously...
PALS results show a bimodal pore size distribution for spirobisindane polymer, with the majority of pores being larger size. Gas permeability, density and suggest polymer undergoes physical aging during permeability testing. also that solution processing generates extra free volume above intrinsic precipitated polymer.
Abstract The natural aging behavior of pure ternary Al‐Mg‐Si alloys is investigated by measuring hardness, electrical resistivity and positron lifetime, as well carrying out thermal analysis atom probe microscopy. It found that several distinct temporal stages can be distinguished in which one these quantities shows a characteristic times coincide for many measurements. rate change the measured data correlated with proposed solute dynamics during both takes place prior to artificial (natural...