How Electrolyte and Polyelectrolyte Affect the Adsorption of the Anionic Surfactant SDS onto the Surface of a Cellulose Thin Film and the Structure of the Cellulose Film. 1. Hydrophobic Cellulose

摘要

The nature of hydrophobic thin cellulose films, formed bynLangmuir−Blodgett (LB) deposition on silica, has been studied using neutronnreflectivity (NR). The impact of electrolyte and a polyelectrolyte, poly-n(dimethyldiallylammonium chloride) (polydmdaac), on the adsorption of thenanionic surfactant sodium dodecyl sulfate (SDS) onto the surface of thenhydrophobic cellulose film and upon the structure of the cellulose film has beenninvestigated. The results show how a combination of polyelectrolytes andnelectrolyte can be used to manipulate surfactant adsorption onto hydrophobicncellulose surfaces and modify the structure of the cellulose film by swelling andnpenetration. The results illustrate how polyelectrolytes can be used to reversenadsorption and swelling of cellulose films which are not reversible simply byndilution in solvent.