2021, №3

сс. 25-32

Preparation of Aerogel Composite Materials Based on Lignosulphonates and Silica

2021, №3

сс. 25-32

Цитировать

O.S. Brovko, K.G. Bogolitsyn, I.A. Palamarchuk, N.A. Gorshkova, N.I. Bogdanovich, A.D. Ivakhnov, M.E. Belousova

Key words: sodium lignosulfonate, silicon dioxide, aerogel, textural characteristics, supercritical fluids

The synthesis of new composite aerogel materials based on sodium lignosulfonates obtained
by various methods of delignification (sulfite and modified bisulfite) and silica using solgel
technology and supercritical fluid processes was performed. It was shown that aerogels
based on sulfite lignosulfonate are characterized by a more developed porous structure
compared to aerogels based on bisulfite lignosulfonate. The pore volume of aerogels based
on sulfite lignosulfonate was 1.4—2.0 cm3g-1, which is 1.5—7.0 times more than that of
aerogels based on bisulfite lignosulfonate. The specific surface area of aerogels based on
sulfite and bisulfite lignosulfonates was 284—452 and 104—280 m2g-1, respectively.