Surface and Pores of Silica Gels as a State of Colloidal Aggregation

Abstract

The state of aggregation and ageing of colloidal silicas was studied in view of the behaviour of silanol groups, by means of thermodynamic, mechanical, ir spectroscopic and chemical methods. A close relationship was found between surface areas, porosities, and other properties of hydrothermally, thermally and chemically treated silicas, and the species and their populations of silanol groups.