Formation kinetics and stability of surfactant vesicles |
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| Authors: | Zhiqiang Zhang Li Ganzuo Ramesh Patel Stig E Friberg Patricia A Aikens |
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| Affiliation: | (1) Institute of Colloid and Interface Chemistry, Shandong University, 250100 Jinan, China;(2) Surfactants, 19850-5391 Wilmington, Delaware;(3) Department of Chemistry, Clarkson University, Box 5810, 13699-5810 Potsdam, NY |
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| Abstract: | A three-component phase diagram of a system containing water, dimethyl isosorbide and Laureth 4 (Brij® 30), a commercial surfactant, was determined, and the kinetics of vesicle formation from dilution with water of the hydrotrope solution was studied using a stop-flow process in conjunction with light-scattering determinations. The phase diagram consisted of a large microemulsion phase and a lamellar liquid crystalline region. Results from the stop-flow/light-scattering determinations were tentatively interpreted using the Aniansson-Kahlweit-Zana theory of micellar relaxation for a system close to equilibrium. The interpretation indicated the vesicles to be formed by monomolecular buildup for surfactant concentrations less than 5%, while for vesicles formed at greater concentrations an agglomeration of vesicle fractions appeared more reasonable. |
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| Keywords: | Liquid crystals microemulsions stop-flow process surfactant association structures vesicles |
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