PROCESS FOR THE PREPARATION OF MONOLITHIC NANOPOROUS SILICATE SOL-GEL MATERIAL

摘要

The invention relates to a process for preparing monolithic nanoporous silicate sol-gel material, making it possible to modulate the distribution of pore sizes for the same starting composition and this without adding a structuring agent, said process comprising the following steps: a) synthesis of a gel from at least one organosilyl precursor, the synthesis being carried out in an aqueous medium optionally comprising an organic solvent and without structuring agent, b) drying of the gel obtained in step a) in gas flow in a drying chamber until a nanoporous silicate sol-gel monolithic material is obtained and a residual relative humidity in the drying chamber of between 0.1 and 20%, preferably between 0.5 and 10% and more preferably at approximately 5%.