Abstract
The aggregation behavior of the non-ionic surfactant Renex-100 in aqueous solutions and mesophases was evaluated by SAXS in a wide range of concentrations, between 20 and 30°C. Complementary, water interactions were defined by DSC curves around 0°C. SAXS showed that the system undergoes the following phase transitions, from diluted to concentrated aqueous solutions: 1) isotropic solution of Renex aggregates; 2) hexagonal mesophase; 3) lamellar mesophase; and 4) isotropic solution. DSC analysis indicated the presence of interfacial water above 70wt%, which agreed with the segregation of free water to form the structural mesophases observed by SAXS bellow this concentration.
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De Campos, D. D. P., Cassu, S. N., Garcia, R. B. R., Da Silva Queiroz, H. A. A., Gonçalves, R. F. B., & Kawachi, E. Y. (2012). Avaliação por saxs e DSC das interações entre H 2O e Renex-100. Quimica Nova, 35(2), 355–359. https://doi.org/10.1590/S0100-40422012000200023
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