Abstract
Bilayer swelling behavior of nonionic and anionic surfactant mixed aqueous solution induced by adding glycerin was studied. The phenomenon were performed on a system, polyethylene glycol ether of tridecyl alcohol with the average number of ethylene oxide of 5 (CH3(CH2)12(OCH2CH2)5OH; abbreviation IT5) and SDS mixed aqueous solution, with white cream of the upper phase and micelles (L1) of the lower phase. White cream containing densely packed multilamellar vesicles was revealed by freeze-fracture transmission electron microscopy and polarized microscope observations. Phase transition from white cream/L1, two-phase, to clear unique vesicle phase can be induced by adding glycerin to replace water. The addition of glycerin lowers the turbidity of the dispersion and swells the interlamellar distance between bilayers, which could be explained by refractive-index matching between solvent and bilayers.
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The authors are thankful for the financial support by the National Natural Science Foundation of China (grant no. 31101600) and the Natural Science Foundation of Shandong Province (grant no. ZR2009BM024).
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Shen, Y., Hoffmann, H., Jiang, L. et al. Bilayer swelling of nonionic surfactant and sodium dodecylsulfate mixed system by refractive-index matching. Colloid Polym Sci 290, 1493–1499 (2012). https://doi.org/10.1007/s00396-012-2665-3
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DOI: https://doi.org/10.1007/s00396-012-2665-3