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Type: Artigo de periódico
Title: Avaliação por SAXS e DSC das interações entre H2O e Renex-100
Title Alternative: SAXS and DSC evaluation of interactions between H2O and Renex-100
Author: 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
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.
Subject: interfacial water
non-ionic surfactant
Editor: Sociedade Brasileira de Química
Citation: Química Nova. Sociedade Brasileira de Química, v. 35, n. 2, p. 355-359, 2012.
Rights: aberto
Identifier DOI: 10.1590/S0100-40422012000200023
Date Issue: 1-Jan-2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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