Studies of the Effects of Aerosilogel Modification by Organic Acids under High Pressures

摘要

Preliminary studies of silica surface modification by means of some organic acids under high reagent pressures were carried out. The reaction took place in a steel autoclave. Suitably granulated aerosilogel and acetic, mono- and trichloro-acetic as well as sulphosalicylic acids were used. Physical and chemical adsorption processes were checked by infrared spectroscopy, thermogravimetry and potentiometric titration. The specific surface area and total volume of pores of the prepared samples were determined. The studies showed some possibilities of attaching organic radicals containing an acid group to the silica surface. This process can be accomplished in one stage.