Original scientific paper

Surfactant Aggregation in Organic Solvents: Structural Features of some Physical Gel Networks Probed by Small Angle Neutron Scattering

P. Terech ; Institut Laue-Langevin, 156X, 38042, Grenoble (Cédex), France

Abstract

We have studied viscoelastic gel-like systems constituted by surfactants in organic solvents. SANS appears to be efficient technique for investigating both the local and long-range structures of the related 3d networks. The basic equations are given for the scattering from the rod-like aggregates encountered in these phases. The aggregation reactions involve mechanisms specific of the surfactant used. A large variety of structural situations has been found. In each case, the polar heads of the surfactants form a polar inner core surrounded by hydrophobic shell constituted by the hydrocarbon chains. The typical mechanical properties of the samples are partly defined by the structure of the junctions in the network: transient entanglements and crystalline microdomains are the extreme cases found in these physical supermolecular organizations.

Keywords

Hrčak ID:

137184

URI

https://hrcak.srce.hr/137184

Publication date:

15.8.1992.

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