A5034088807- Pickering emulsions and particle stabilization
- Surfactants and Colloidal Systems
- Proteins in Food Systems
- Polymer Foaming and Composites
- Surface Roughness and Optical Measurements
- Granular flow and fluidized beds
- Advanced Polymer Synthesis and Characterization
- Innovative Microfluidic and Catalytic Techniques Innovation
- Dyeing and Modifying Textile Fibers
- Heat and Mass Transfer in Porous Media
- Injection Molding Process and Properties
- Minerals Flotation and Separation Techniques
- Micro and Nano Robotics
- Enhanced Oil Recovery Techniques
- Semiconductor materials and devices
- Underwater Acoustics Research
- Electrostatics and Colloid Interactions
- Textile materials and evaluations
- Laser-induced spectroscopy and plasma
- Geophysical Methods and Applications
- Calcium Carbonate Crystallization and Inhibition
- Crystallization and Solubility Studies
- Microfluidic and Capillary Electrophoresis Applications
- Microencapsulation and Drying Processes
- Food Chemistry and Fat Analysis
University of Leeds
2011-2024
The influence of particle adsorption on liquid/liquid interfacial tension is not well understood, and much previous research has suggested conflicting behaviors. In this paper we investigate the surface activity kinetics charge stabilized pH-responsive polymer colloids at oil/water interfaces using two tensiometry techniques: (i) pendant drop (ii) microtensiometer. We found, both techniques, that particles had little or no (dynamic) tension, although dense silica affected "apparent" measured...
There is currently a significant interest in the production of stable emulsions using particulate emulsifiers. A key design and manufacturing challenge such systems with controlled droplet sizes narrow polydispersity; one candidate technique membrane emulsification. In this study we demonstrate that under optimal conditions, highly near monodisperse tricaprylin droplets stabilised 800 nm silica colloids can be achieved Rotating Membrane Emulsification (RME). We report influence various...
In the past eight years, several examples of colloidosome microcapsules have been developed. Such systems are offering alternative options for encapsulation and release active ingredients on basis size exclusion properties their colloidal membranes. Here, we use latex particles sterically stabilised with a responsive polymer as building blocks microcapsule membranes demonstrate that designed can be used pH-responsive system to control water-soluble species exclusion. For manufacture, an...
There is currently significant interest in particle-stabilized emulsions for a variety of applications and as precursors to other materials such microcapsules or colloidosomes. A prerequisite many the ability produce stable droplets with well-controlled size. The preparation oil-in-water (o/w) stabilized by silica colloids has been demonstrated here using membrane emulsification techniques. Emulsions were produced both cross-flow device rotating reactor. Under correct conditions, highly very...
The precipitation of CaCO3 via CO2 bubbling using well-defined membranes was used in this study to produce particles a variety structures. Studies into the mechanisms particle formation method are limited and mainly specific hollow Using range analytical techniques, produced with stagnant bubble systems (crossflow vertical flow) were investigated. work concluded that both bulk but also at gas/liquid interface which then fall down collect base bubble, whereas dynamic system wake has an...
Stirred cell membrane emulsification (SCME) has been employed to prepare concentrated Pickering oil in water emulsions solely stabilized by fumed silica nanoparticles. The optimal conditions under which highly stable and low-polydispersity using the SCME approach are highlighted. Optimization of flux rates paddle stirrer speeds critical achieving control over droplet size distribution. Investigating influence volume fraction highlights criticality initial particle loading continuous phase on...
Polymer stabiliser adsorption kinetics influence a stirred-cell membrane emulsification process output. An optimized combination of low/higher MW PVA at very low concentration (0.1 wt%) produces narrow size distribution and size-controlled droplets.
Accurate control of particle size at relatively narrow polydispersity remains a key challenge in the production synthetic polymer particles scale. A cross-flow membrane emulsification (XME) technique was used here preparation poly(methyl methacrylate) microspheres 1-10 l h(-1) scale, to demonstrate its application for such manufacturing challenge. XME technology has previously been shown provide good over emulsion droplet sizes with careful choice operating conditions. We that, an...
In this article, the adsorption of latex core-responsive polymer-shell nanoparticles at air-water interface is investigated using a Langmuir trough. Phase transition isotherms are used to explore their responsive behavior as function changes in pH subphase. By adjusting water prior particle deposition, we probe effect stabilizing polymer wetting by subphase on stability these particles interface. addition, initially compressing stable film adsorbed and then subsequently changing study...
In this study, diblock copolymers poly(methyl methacrylate)-block-poly (2-dimethylaminoethyl methacrylate) (pMMA-b-pDMAEMA) are investigated for the steric stabilization of latex particles and subsequent use these as Pickering emulsifiers. Solution properties highlight that pDMAEMA block length influences critical micelle concentration (CMC) hydrodynamic diameter in response to changes pH pKa. The can also be used a way control particle size sterically stabilized polystyrene prepared via...
Particulate additives such as perfume microcapsules are present in detergent formulations to add fragrance the washed garments. The key challenge is controlling deposition and retention of particulates onto textile surfaces, a large proportion simply down drain during washing. In this study, influence particle shape on mechanical entrapment within different fabrics assessed using laboratory mixer, which mimics tumbling action washing machine. Using combination image analysis mass balance it...
Coating with viscous formulations has been essential in numerous industries as it can be a means for providing functionalization, additional properties, well other benefits. However, there have scarce studies that investigated and proposed methodologies literature. Continuous coating of powders liquids poses promising technology, which mentioned some studies, but not yet thoroughly investigated. This paper employs the use image processing analysis, combination statistical analysis particles...