Investigation of the structure of chitosan hybrid systems by pH-sensitive nitroxyl radical

Abstract

Hybrid organo-inorganic materials based on the chitosan'SiO2, chitosan'Al2O3, and chitosan-cellulose systems are prepared. The structure of the surface is studied by means of EPR spectroscopy using the stable pH-sensitive nitroxyl radical, 4-dimethylamino-2-ethyl-5,5- dimethyl-2-pyridine-4-yl-2,5-dihydro-1H-imidazole-1-oxyl as adsorbed probe molecules, and the processes that occur during the formation of hybrid materials are considered. © 2011 Pleiades Publishing, Ltd.