Key words: aerogels, silica, dimethyl sulfoxide, transparency, modification
Dimethyl sulfoxide (DMSO) is proposed as a solvent at the gelation stage during the synthesis of transparent aerogels based on tetramethyl orthosilicate and 3-aminopropyltrimethoxysilane (APTMS). The transparency of the aerogels varied depending on the content of the aminopropyl fragment. The textural characteristics of the aerogels were studied. It was shown that the use of DMSO instead of isopropanol, a standard solvent for the synthesis of gels, allows one to significantly increase the specific surface area of the aerogels. Using DMSO as a solvent, transparent aerogels based on APTMS and modified with fragments of perfluorononanoic acid and L-phenylalanine were obtained. The possibility of obtaining transparent aerogels containing amino complexes of transition metals, namely copper and palladium, was demonstrated.
doi:10.1134/S1990793125701027