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

AUTOR(ES)

Campos, Daniella Dias Palombino de, Cassu, Silvana Navarro, Garcia, Renata Batista Rivero, Queiroz, Hiure Anderson Alves da Silva, Gonçalves, Rene Francisco Boschi, Kawachi, Elizabete Yoshie

FONTE

Química Nova

DATA DE PUBLICAÇÃO

2012

RESUMO

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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