PREPARATION OF VERMICULITE AND POLYPOLYACRYLONITRILE COMPOSITE AND ITS MODIFICATION WITH DIETHANOLAMINE

Abstract: This article studied the characteristics of vermiculite sourced from the Tebinbulok mine situated within the borders of the Republic of Uzbekistan, as well as the most favorable conditions for its activation through heating and treatment. A 7% solution of hydrochloric acid was used for activation. Activated vermiculite was modified using maleic anhydride and polyacrylonitrile dissolved in acetic acid solution. The properties of the resulting composite were studied. To further increase its sorbent properties, diethanolamine with an amine functional group was added to the composite. A laboratory study of the obtained organicinorganic composite is presented. The research was carried out in the state connected to the reflux cooler, at a temperature of 60-70ºC, with constant stirring. The properties, microstructure, porosity, thermal tolerance, and composition of the samples were analyzed using traditional and empirical methods of physical and chemical analysis, respectively, and IRTracer-100 SHIMADZU (Japan), infrared IR-Fourier, MIRA 2 LMU scanning electron microscope (SEM), elemental analysis, thermogravimetric (TGA and DTA) analysis, and X-ray phase analysis were studied. The results showed that after activation, vermiculite, which is almost chemically stable, was bound to polyacrylonitrile through the OH¯ bonds formed in it, and maleic anhydride acted as a modifier in the binding, polyacrylonitrile vermiculite polymerized in solution It was proved by analysis that it formed one composite with OH- bonds formed on its surface. To further increase the sorption capacity of this composite with maleic anhydride as a binder, diethanolamine containing an amine functional group was added to it.