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Type: Artigo de periódico
Title: Saxs And Dsc Evaluation Of Interactions Between H 2o And Renex-100 [avaliação Por Saxs E Dsc Das Interações Entre H 2o E Renex-100]
Author: De Campos D.D.P.
Cassu S.N.
Garcia R.B.R.
Da Silva Queiroz H.A.A.
Goncalves R.F.B.
Kawachi E.Y.
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.
Rights: aberto
Identifier DOI: 10.1590/S0100-40422012000200023
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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