Study on the Interaction of Cationic Gemini Surfactant with Sodium Carboxymethyl Cellulose
- 1 January 2021
- journal article
- research article
- Published by Walter de Gruyter GmbH in Tenside Surfactants Detergents
- Vol. 58 (1), 13-19
- https://doi.org/10.1515/tsd-2020-2252
Abstract
In the present study, the interaction of the anionic polymer sodium carboxymethyl cellulose (NaCMC) with the two cationic gemini surfactant (C 12 -(EO)-E-C 12 and C 12 -(EO) 2 -E-C 12 ) has been investigated by surface tension and turbidity measurements. The co-adsorption of the polymer and the surfactants as well as the formation of highly surface-active polymer-surfactant complex was observed. By inserting the surface tension data into the Gibbs equation it could be shown that the surface layers of the mixed solutions have a multi-level adsorption structure. Comparing the critical adsorption concentration (C 1 ), the critical saturation concentration (C 2 ) and the critical micelle formation concentration (C 3 ) of mixtures with different concentrations, it can be seen that all variables increase with the increase in polymer concentration. In addition, the inorganic salt (NaBr) greatly influences the C 1 , C 2 and C 3 . The salt effects depend on the competition between the salt-enhancing effect and the salt-shielding effect.Keywords
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