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Article Dans Une Revue Polymer international Année : 2003

A thermophysical approach to the behaviour of gels and complex micellar solutions

Résumé

DSC analysis, conductimetric and rheological techniques have been used to investigate the structural changes able to develop in the [water + hexadecyltrimethyl ammonium bromide (CTAB) + phenol] ternary micellar system. Specific, mainly electrostatic, interactions at the micellar interface between the surfactant polar head groups and phenol give rise to a swelling of aggregates into worm-like micelles as evidenced by large changes of viscosity of the mixture in some phenol/CTAB ratio and temperature ranges. A thermophysical approach allowed us to determine the formation of a strong 1:1 complex between CTAB and phenol, as evidenced by either the viscoelastic properties of the solution or the formation of thermoreversible gels. At low temperature, a crystallized molecular surfactant complex is also observed. Its melting point differs from the Krafft temperature of CTAB.

Dates et versions

hal-00265310 , version 1 (18-03-2008)

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Citer

Alain H. Roux, Karine Ballerat-Busserolles, Geneviève Roux-Desgranges. A thermophysical approach to the behaviour of gels and complex micellar solutions. Polymer international, 2003, 52, pp.638-643. ⟨10.1002/pi.1011⟩. ⟨hal-00265310⟩

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