A5079855517- Surfactants and Colloidal Systems
- Crystallization and Solubility Studies
- Microfluidic and Capillary Electrophoresis Applications
- Chemical and Physical Properties in Aqueous Solutions
- Material Dynamics and Properties
- Innovative Microfluidic and Catalytic Techniques Innovation
- Electrohydrodynamics and Fluid Dynamics
- Analytical Chemistry and Chromatography
- Electrostatics and Colloid Interactions
Imperial College London
2017
The structure and flow behavior of a concentrated aqueous solution (45 wt %) the ubiquitous linear sodium alkylbenzenesulfonate (NaLAS) surfactant is investigated by microfluidic small-angle X-ray scattering (SAXS) at 70 °C. NaLAS an intrinsically complex mixture over 20 molecules, presenting coexisting micellar (L1) lamellar (Lα) phases. Novel devices were fabricated to ensure pressure thermal resistance, ability handle viscous fluids, low SAXS background. Polarized light optical microscopy...
We report a microfluidic approach to perform small angle neutron scattering (SANS) measurements of contrast variation and matching, extensively employed in soft biological matter research.
The crystallization mechanisms and kinetics of micellar sodium dodecyl sulfate (SDS) solutions in water, under isothermal conditions, were investigated experimentally by a combination reflection optical microscopy (OM), differential scanning calorimetry (DSC), attenuated total Fourier transform infrared spectroscopy (ATR-FTIR). rates nucleation growth estimated from OM DSC across temperatures ranging 20 to −6 °C for 20% SDS-H2O, as well 10 30% SDS-H2O at representative 6, 2, −2 °C. A...
The crystallization kinetics of sodium dodecyl sulfate (SDS)-water micellar solutions, under linear cooling conditions, were experimentally investigated using optical microscopy, differential scanning calorimetry, and infrared spectroscopy. Cooling rates systematically varied, from 0.1 to 50 °C min–1, encompassing environmental near-"isothermal" temperature changes, between 22 −5 °C, for a reference concentration 20% SDS-H2O. rate was shown determine the dominant crystal morphologies, with...
Kinetic and morphological insight into the crystallisation of micellar SDS–H<sub>2</sub>O solutions using small quantities structurally similar additives.