Engineering Thermoresponsive Emulsions with Branched Copolymer Surfactants

Natural Surfactants for Pharmaceutical Emulsions

Biocompatible surfactants for water-in-fluorocarbon emulsions.

Drops of water-in-fluorocarbon emulsions have great potential for compartmentalizing both in vitro and in vivo biological systems; however, surfactants to stabilize such emulsions are scarce. Here we present a novel class of fluorosurfactants that we synthesize by coupling oligomeric perfluorinated polyethers (PFPE) with polyethyleneglycol (PEG). We demonstrate that these block copolymer surfac...

HOW SURFACTANTS STABILIZE EMULSIONS Copolymer surfactants start on page 10 I. Stabilization of a concentrated emulsion with a very viscous dispersed phase

[1 ] D.A. Edwards, H. Brenner, Darsh T. Wasan, Interfacial transport processes and rheology. Butterworth { Heinemann Boston, 1991. [2 ] Ivan Ivanov, Interfaces, foams and emulsions, Course notes, 1994 (unpublished). [3 ] A.K. Malhatori and D.T. Wasan, E ect of surfactant adsorption { desorption kinetics and interfacial rheological properties on the rate of drainage of foam and emulsion lms. Che...

Study of structure and thermal properties of styrene-butylacrylate ‎copolymer with OMMT nanocomposite emulsions

‎(St-co-BA) polymer through montmorillonite (MMT) nanocomposite emulsion is prepared by ‎in situ intercalative emulsion polymerization of styrene (St), butyl acrylate (BA) in the ‎presence of organic modified montmorillonite (OMMT) with different OMMT contents (0, ‎‎0.5, 1.0, 1.5, and 2.0 wt%). The synthetic compounds are characterized by FTIR, XRD. The ‎nanocomposite emulsions are characterize...

Low-surface energy surfactants with branched hydrocarbon architectures.

Surface tensiometry and small-angle neutron scattering have been used to characterize a new class of low-surface energy surfactants (LSESs), "hedgehog" surfactants. These surfactants are based on highly branched hydrocarbon (HC) chains as replacements for environmentally hazardous fluorocarbon surfactants and polymers. Tensiometric analyses indicate that a subtle structural modification in the ...