A5070485177- Hydrogels: synthesis, properties, applications
- Conducting polymers and applications
- Advanced Polymer Synthesis and Characterization
- Surfactants and Colloidal Systems
- Pickering emulsions and particle stabilization
- Polymer Surface Interaction Studies
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Organic Electronics and Photovoltaics
- Supramolecular Self-Assembly in Materials
- Electrostatics and Colloid Interactions
- Advanced Sensor and Energy Harvesting Materials
- Advanced Materials and Mechanics
- Polymer Nanocomposites and Properties
- 3D Printing in Biomedical Research
- Analytical Chemistry and Sensors
- biodegradable polymer synthesis and properties
- Chalcogenide Semiconductor Thin Films
- Proteins in Food Systems
- Electrospun Nanofibers in Biomedical Applications
- Spine and Intervertebral Disc Pathology
- Organic Light-Emitting Diodes Research
- Advanced Drug Delivery Systems
- Surface Modification and Superhydrophobicity
- Polymer composites and self-healing
University of Manchester
2015-2024
East Kent Hospitals University NHS Foundation Trust
2023
University of Nottingham
2008-2009
Zhengzhou University of Light Industry
2008
University of Leeds
2004-2007
St Mark's Hospital
2007
Imperial College London
2007
The University of Adelaide
1999-2005
University of Bristol
1997-2003
Monash University
1992-1997
Perovskite solar cell efficiency and stability are improved by π-conjugated aromatic additives that hydrophobic or hydrophilic due to strong binding with the perovskite.
This investigation presents a study of the internal structure poly(NIPAM/xBA) microgel particles (NIPAM and BA are N-isopropylacrylamide N,N'-methylene bisacrylamide, respectively). In this study, x is wt % used during synthesis. Two values were to prepare microgels, 1 10. The dispersions investigated using photon correlation spectroscopy (PCS) small-angle neutron scattering (SANS). These measurements made as function temperature in range 30-50 degrees C. Scattering maxima observed for...
We review structurally complex hydrogels and consider key parameters controlling their structures properties conclude by suggesting a framework for assessing the novelty of new gels.
The structure and stability of water-in-water emulsions was investigated in the presence spherical, pH-sensitive microgels. were formed by mixing aqueous solutions dextran PEO. microgels consisted cross-linked, synthetic polymers with a radius that steeply increased from 60 to 220 nm increasing pH within narrow range around 7.0. At all values between 5.0 7.5, preferentially situated at interface, but only 7.0 stable for least 1 week. droplet size visualized confocal laser scanning microscopy...
The swelling of poly[(methyl methacrylate)-co-(methacrylic acid)] (PMA-MAA) microgel particles (prepared using 17 mol % MAA) dispersed in water can be controlled by pH adjustment, addition alkanols, and soluble homopolymer. Transmission electron microscopy revealed two-dimensional order for PMA-MAA deposited on a grid from alkaline solution. the was studied means photon correlation spectroscopy. stability investigated turbidity−wavelength measurements; flocculation occurred when less than 6....
Electrophoretic mobility and hydrodynamic radius measurements of poly(N-isopropylacrylamide) [poly(NIPAM)] microgel particles dispersed in water were made as a function temperature ionic strength. The data reveal differences between the temperatures at which particle volume electrophoretic undergo significant changes. phase transition (VPTT) occurred was 5–6°C lower than pronounced changes occurred. appear to be consistent with three stages collapse for over range 25–50°C. Ohshima's...
Phenylacetyl-peptide amphiphiles were designed, which upon cleavage by a disease-associated enzyme reconfigure from micellar aggregates to fibres. Upon this morphological change, doxorubicin payload could be retained in the fibres formed, makes them valuable carriers for localised formation of nanofibre depots slow release hydrophobic anticancer drugs.
A poly(glycerol monomethacrylate) (PGMA) chain transfer agent is chain-extended by reversible addition-fragmentation (RAFT) statistical copolymerization of 2-hydroxypropyl methacrylate (HPMA) with glycidyl (GlyMA) in concentrated aqueous solution via polymerization-induced self-assembly (PISA). series five free-standing worm gels prepared fixing the overall degree polymerization core-forming block at 144 while varying its GlyMA content from 0 to 20 mol %.
The use of injectable pH-responsive doubly cross-linked microgels (DX microgels) to improve the mechanical properties degenerated intervertebral discs is demonstrated for first time. microgel comprised methyl methacrylate (MMA), methacrylic acid (MAA), ethyleneglycol dimethacrylate (EGD) and glycidyl (GM) was poly(MMA/MAA/EGD)-GM. GM facilitated covalent interparticle cross-linking. DX are shown have tunable properties. Degeneration model bovine (IVDs) induced using collagenase. When...
Abstract Fabrication strategies for programmed hydrogels that provide precise spatial control with predetermined responses to external stimuli are highly desirable. In this study, a partially reversible light‐driven assembly (PRLDA) method is introduced construct multiresponsive utilizing microgel (MG) particle building blocks (swollen diameter of 107 nm). No other material required prepare the gels beyond MGs themselves. Facile preparation reversibly responsive light, pH, and temperature...
Highly deformable crosslinked polymer particles enhance perovskite solar cell passivation and stability by binding distributing throughout the film.
Poly(N-isopropylacrylamide) (poly(NIPAM)) microgel dispersion stability has been investigated in the presence of a range electrolytes. The dispersions to flocculation is strongly related free energy change formation aqueous solution for anions (ΔGfo) and their position lyotropic series. ability induce particle deswelling using photon correlation spectroscopy turbidity-wavelength measurements, respectively. Anions with high charge density (and negative values ΔGfo) have dehydrate poly(NIPAM)...
The effects of temperature and added free polymer on the swelling poly(NIPAM)(NIPAM =N-isopropylacrylamide) microgel particles cross-linked with N,N′-methylene bisacrylamide have been investigated. were characterized by photocorrelation spectroscopy (PCS), TEM SEM measurements. Particle sizes determined invariably larger than those measured at 50 °C PCS. data suggest that dried an oblate spheroid shape. rate which poly(NIPAM) collapse swell in response to cycling between 28 60 was examined...
Chronic radiation proctitis is a relatively common late complication of pelvic irradiation. The main symptoms are diarrhea, urgency, tenesmus, and rectal bleeding. While mild cases may settle spontaneously over some months, severe hemorrhagic require repeated blood transfusions difficult to treat with medical therapy. Argon plasma coagulation (APC) noncontact thermal technique which can be applied endoscopically. A probe passed through the scope delivers field argon gas mucosal surface where...
Hyperplastic Polyposis (HPPS) is a poorly characterized syndrome that increases colorectal cancer (CRC) risk. We aimed to provide molecular classification of HPPS. obtained 282 tumours from 32 putative HPPS patients with >or= 10 hyperplastic polyps (HPs); some also had adenomas and CRCs. found no good evidence microsatellite instability (MSI) in our samples. The epithelium HPs was monoclonal. Somatic BRAF mutations occurred two-thirds patients' HPs, KRAS2 10%; both were more common younger...
The structure and properties of conventional, singly crosslinked, pH-responsive microgel particles (SX microgels) have been extensively studied. Recently, doubly crosslinked microgels (DX reported. These are a new type hydrogel that constructed from covalently linked SX microgels. In this study we report for the first time an investigation class DX which pH responsive. were prepared using covalent linking physically gelled dispersions inter-penetrating, vinyl-functionalised used...
Conjugated oligomers with various ratios of cyclopentadithiophene (CPDT) to benzothiadiazole (BT) repeating units are reported. These can be polymerised high molecular weight polymers (Mn > 100k) by oxidative polymerisation using iron(III)chloride. The electronic properties these materials were examined cyclic voltammetry and UV-vis spectroscopy the results compared those calculated density functional theory (DFT). Polymers optimum CPDT : BT (2 1) show hole mobilities in excess 10−2 cm2 V−1...