Measurements were undertaken to determine the unknown microbubble-size distribution of a dodecafluoropentane (DDFP) emulsion consisting of 10 droplets/ml in surfactant-stabilized water. The acoustic backscatter of 2-microsecond-duration tonebursts of 30-MHz focused ultrasound was measured from the emulsion as it moved in a coaxial flow. Calibration for the system was accomplished using 3-mm-rad...

Pickering emulsions have been widely used for biphasic catalysis in the past decade. However, it remains a great challenge to achieve simple product collection and enzyme recovery. Poly(N-isopropylacrylamide) (PNIPAM)-based microgels can endow with stimuli-responsiveness, while most microgel-stabilized are oil-in-water (O/W) type not ideal interfacial catalysis. Besides, altering temperature or...

Objective: The Primary objective of the present investigation was to stabilize ascorbic acid by blocking its irreversible conversion to biologically inactive form. Further aim of the project was to disperse stabilized ascorbic acid in internal aqueous phase of multiple emulsions and deliver it in a suitable base for topical application and enhanced transdermal permeation. Materials and Methods:...

Thin emulsion films stabilized with â-casein were studied by microinterferometry. The data demonstrate that the film thickness and intersurface adhesion are influenced by the electrolyte concentration, the prehistory of the protein solution, pH and the presence of fatty acids in the oil phase. A major shift of the film parameters occurs in the presence of calcium ions. The decrease of the film ...

Herein, we report the phase inversion of ionomer-stabilized emulsions to form high internal phase emulsions (HIPEs) induced by salt concentration and pH changes. The ionomers are sulfonated polystyrenes (SPSs) with different sulfonation degrees. The emulsion types were determined by conductivity measurements, confocal microscopy and optical microscopy, and the formation of HIPE organogels was v...

A versatile new concept is presented for the synthesis of Janus colloids composed of Laponite nanoclay armored poly(divinylbenzene) with an anisotropic surface potential via a double Pickering emulsion template. First, polystyrene or poly(divinylbenzene) colloids stabilized with Laponite nanoclay are synthesized via a Pickering miniemulsion approach. These nanoparticle-stabilized colloids were ...