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- W3045246540 abstract "Polyelectrolyte-surfactant complexes (PESCs) are important soft colloids with applications in the fields of personal care, cosmetics, pharmaceutics, and much more. If their phase diagrams have long been studied under pseudoequilibrium conditions, and often inside the micellar or vesicular regions, understanding the effect of nonequilibrium conditions, applied at phase boundaries, on the structure of PESCs generates an increasing interest. In this work we cross the micelle-vesicle and micelle-fiber phase boundaries in an isocompositional surfactant-polyelectrolyte aqueous system through a continuous and rapid variation of pH. We employ two microbial glycolipid biosurfactants in the presence of polyamines, both systems being characterized by their responsiveness to pH. We show that complex coacervates (Co) are always formed in the micellar region of both glycolipids' phase diagram and that their phase behavior drives the PESC stability and structure. However, for glycolipid forming single-wall vesicles, we observe an isostructural and isodimensional transition between complex coacervates and a multilamellar walls vesicle (MLWV) phase. For the fiber-forming glycolipid, on the contrary, the complex coacervate disassembles into free polyelectrolyte coexisting with the equilibrium fiber phase. Last but not least, this work also demonstrates the use of microbial glycolipid biosurfactants in the development of sustainable PESCs." @default.
- W3045246540 created "2020-07-29" @default.
- W3045246540 creator A5014157571 @default.
- W3045246540 creator A5024607102 @default.
- W3045246540 creator A5028382987 @default.
- W3045246540 creator A5031833438 @default.
- W3045246540 creator A5041200503 @default.
- W3045246540 creator A5060103301 @default.
- W3045246540 creator A5073465076 @default.
- W3045246540 date "2020-07-23" @default.
- W3045246540 modified "2023-10-14" @default.
- W3045246540 title "Stimuli-Induced Nonequilibrium Phase Transitions in Polyelectrolyte–Surfactant Complex Coacervates" @default.
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