Avaliação por SAXS e DSC das interações entre H2O e Renex-100

Química Nova

Daniella Dias Palombino De Campos¹  Silvana Navarro Cassu²  Renata Batista Rivero Garcia²  Hiure Anderson Alves Da Silva Queiroz²  Rene Francisco Boschi Gonçalves²  Elizabete Yoshie Kawachi² 

[1] ,Universidade Estadual de Campinas Instituto de Química Campinas SP ,Brasil

关键词: interfacial water;    non-ionic surfactant;    mesophase;   

DOI  :  10.1590/S0100-40422012000200023

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY-NC   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License