SURFACE MODIFICATION OF MONTMORILLONITE CLAY WITH ORGANIC MOLECULES

Abstract

In this paper, the organoclay was synthesized by the modification of the Na-montmorillonite from the deposit of Tagan (East Kazakhstan) with octadecylamine (ODA). Using X-ray phase analysis, the intercalation of ODA molecules in the interlayer spaces of the mineral was studied. The presence of ODA in the clay structure and the formation of hydrogen bonds in it after modification were confirmed by IR spectroscopy. According to the results of dynamic light scattering, a decrease in the particle size of montmorillonite after modification was shown. The TGA curves showed a decrease in the content of bound water in organoclay compared with the initial mineral. The determination of the contact angles made it possible to ascertain the substantial hydrophobization of montmorillonite and to create an optimal concentration of ODE causing this effect.