A5022054832- Advanced Cellulose Research Studies
- Electrospun Nanofibers in Biomedical Applications
- Material Properties and Processing
- Polysaccharides and Plant Cell Walls
- Nanocomposite Films for Food Packaging
- Minerals Flotation and Separation Techniques
- Lignin and Wood Chemistry
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Electrostatics and Colloid Interactions
- Hydrogels: synthesis, properties, applications
- Liquid Crystal Research Advancements
- Surfactants and Colloidal Systems
- Polymer Surface Interaction Studies
- Membrane Separation Technologies
- Electrohydrodynamics and Fluid Dynamics
- Surface Modification and Superhydrophobicity
- 3D Printing in Biomedical Research
- Analytical chemistry methods development
- Skin Protection and Aging
- Biosensors and Analytical Detection
- Luminescence and Fluorescent Materials
- Ultrasound and Cavitation Phenomena
- Organic Electronics and Photovoltaics
- Pickering emulsions and particle stabilization
Monash University
2019-2023
Institute of Chemical Engineering
2019
The University of Melbourne
2011-2018
Hypothesis Poly(N-isopropylacrylamide) [PNIPAM]-grafted cellulose nanofibers (CNFs) are new thermo-responsive hydrogels which can be used for a wide range of applications. Currently, there is no clear understanding the precise mechanism by CNFs and PNIPAM interact together. Here, we hypothesize that physical crosslinking grafted on CNF inhibits free movement individual CNF, increases gel strength while sustaining its properties. Experiments The behaviour PNIPAM-grafted (PNIPAM-g-CNFs),...
A pH dependent reversible sponge like behaviour of a BSA nanolayer adsorbed at the gold-saline interface is revealed by QCM-D, AFM and contact angle measurements. During saline rinsing cycles, layer adsorbs water molecules 7.0 releases them 4.5. The phenomenon remains constant reproducible upon multiple cycles. thickness also increases with reverses back to its original Varying ionic strength further desorbs more from layer, which decreases mass thickness. However, both changes, all remain...
Abstract Cellulose nanomaterial (CNM) aspect ratio strongly influences sheet formation and resulting mechanical, optical, barrier properties. However, there is a lack of fast reliable methods for CNM determination, limiting the production nanocellulose at industrial-scale. Current laboratory approaches comprise microscopic (e.g. atomic force microscopy (AFM) transmission electron (TEM)), sedimentation methods, which are time-consuming limited to specific fibre sizes. Here, we describe new...
Bubble coalescence behavior in aqueous electrolyte (MgSO(4), NaCl, KCl, HCl, H(2)SO(4)) solutions exposed to an ultrasound field (213 kHz) has been examined. The extent of was found be dependent on type and concentration, could directly linked the amount solubilized gas (He, Ar, air) solution for conditions used. No evidence specific ion effects acoustic bubble found. results have compared with several previous studies bubbles aliphatic alcohol absence field. It is concluded that impedance...
Grafting novel and nature-inspired phenolic esters onto cellulose nanocrystals (CNCs) provides nanofibers with excellent protection against UV radiation when incorporated into a polymer matrix. In this work, CNCs decorated UV-absorbing diester (CNC-diethyl ferulate or CNC-DEF) obtained via click-type copper-catalyzed azide/alkyne cycloaddition reaction were polyvinyl alcohol (PVA) matrix to produce transparent films photostability properties. PVA filled 20 wt % CNC-DEF exhibited complete (0%...
Abstract New nature‐inspired and plant‐derived p ‐hydroxycinnamate esters diesters provide excellent protection against UV radiation when incorporated into a matrix. Herein, an efficient sustainable pathway is reported to graft these phenolic compounds onto cellulose nanocrystals (CNCs) via click‐type copper‐catalyzed azide/alkyne cycloaddition (CuAAC) reaction. The successful grafting of the on CNC surface was evidenced by range chemical analyses, degrees substitution (DS) were found depend...
A family of thermoresponsive poly(N-isopropylacrylamide) [PNIPAM]-grafted cellulose nanofibers (CNFs) was synthesized via a novel silver-promoted decarboxylative polymerization approach. This method relies on the oxidative decarboxylation carboxylic acid groups to initiate free radicals surface CNFs. The reaction employs relatively mild conditions and can be performed in one-step, one-pot fashion. rapid forms C─C bond between CNF PNIPAM, along with formation polymer solution. degree...
The iridescent optical properties of films made cellulose nanocrystals (CNC) are controlled by the pitch and range chiral nematic structures. These further tuned with addition electrolyte.Electrolyte type, valency concentration were varied. bulk CNC suspension investigated combining rheology, polarised photography microscopy, while spacing between crystals was determined using SAXS.The electrolyte to a containing structures first causes increase indicating has weaker structure. Further...
Inspired by nature's photoprotection mechanisms, we report an effective UV-blocking nanomaterial based on diethyl sinapate-grafted cellulose nanocrystals (CNC-DES). The colloidal stability and performance of CNC-DES in aqueous glycerol (a common humectant petroleum-free cosmetic formulations) a commercially available moisturizing cream were studied. Grafting the water-insoluble DES onto CNCs renders it dispersible these water-based formulations, thanks to excellent water-dispersibility CNC...
Trimer, tetramer, and pentamer oligomers based on the polymer backbone structure of poly[2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylenevinylene] (MEHPPV) have been synthesized by Horner-Wadsworth-Emmons reactions. The fluorescence spectra, emission quantum yields, lifetimes characterized in dilute chloroform solutions. exhibit a sequential increase absorption wavelength maxima decrease lifetime as π conjugation length is increased. shortening excited state shown to be due an rates both...