Dynamic properties of gelatin/surfactant adsorption layers
Year: 2016
Journal: Colloid Surf. A-Physicochem. Eng. Asp.
Authors: Derkatch, SR; Kolotova, DS; Milyaeva, OY; Noskov, BA
Simultaneous measurements of the dilational dynamic surface elasticity and surface tension allow the tracing of the main changes in the adsorption layer structure of aqueous mixtures of gelatin with cetylpyridinium chloride (CPC). At low surfactant concentrations (<0.01.mM), the increase of the dynamic surface elasticity indicates the strengthening of the gel-like elastic structure of the adsorption layer. The further increase of CPC concentration results in the loosening of the structure due to the increase of the charge of adsorbed gelatin/CPC complexes. Beyond the critical micellar concentrations, the complexes are mainly displaced from the surface by surfactant monomers. (C) 2016 Elsevier B.V. All rights reserved.
