Preparation of interpolymer complexes of chitosan and sodium alginate

Abstract

The method of synthesis of new cheap and biodegradable soil former — an interpolymer complex (IPC) based on natural polymers has been developed for the first time. To solve environmental problems biocompatible with living tissues, bioinert natural polymers — polysaccharides chitosan (CS) and sodium alginate (AL) were used as structural components of the IPC. The chitosan-sodium alginate IPC was prepared by mixing equimolar solutions of polymers in a given proportion. The composition and properties of the prepared polymer complexes — mass, electrical conductivity, mechanical properties, rheological properties, size and particle charge, structure were determined by physicochemical methods (reoviscosimetry, mechanical analysis, gravimetry, potentiometric and conductometric titration, dynamic light scattering and Fourier-transform infrared spectroscopy). The composition of the chitosan — sodium alginate complex CS: AL is 1:4. It is established that the formation of an interpolymer non-stoichiometric complex occurs as a result of ion-ion interactions. Films based on IPC of CS and AL were prepared and mechanical properties of this films were detected. Films based on interpolymer complex have higher mechanical strength than films of individual polymers. Therefore, this polymer system is a promising material for the use it in preventing wind and water migration of lands.