Synthesis of Transparent Amino-Modified SiO2-Aerogels and Their Derivatives

Dimethyl sulfoxide (DMSO) is proposed as a solvent at the gelation stage for obtaining transparent aerogels (AGs) based on tetramethyl orthosilicate and 3-aminopropyltrimethoxysilane (APTMS). The transparency of the AGs varies depending on the content of the aminopropyl fragment. The textural characteristics of the AGs are studied. It is shown that the use of DMSO instead of isopropanol, a standard solvent for obtaining the gel, makes it possible to significantly increase the specific surface area of the AGs. Using DMSO as a solvent, transparent AGs based on APTMS modified with residues of perfluorononanoic acid and L-phenylalanine are synthesized. It is shown that it is possible to obtain transparent AGs containing amino complexes of transition metals, namely, copper and palladium.