Journal of Siberian Federal University. Chemistry / Optimization of the Process of Synthesis of Lignin–Tannin-Formaldehyde Organic Aerogels

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Issue
Journal of Siberian Federal University. Chemistry: 2016, Vol. 9, Issue 2
Authors
Grishechko, Liudmila I.; Mikova, Nadezhda M.; Kuznetsov, Boris N.
Contact information
Grishechko, Liudmila I.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia; Mikova, Nadezhda M.:Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia; Kuznetsov, Boris N.: аInstitute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia bSiberian Federal University 79 Svobodny, Krasnoyarsk, 660041 Russia; E-mail:
Keywords
lignin; aerogel; optimization process; mathematical model; porous structure
Abstract

The method of experimental statistical analysis was applied to study the effect of concentration of lignin (X1) and the pH of the reaction solution (X2) on the values of specific parameters of the porous structure obtained organic lignin-tannin-formaldehyde (LTF) aerogels. Mathematical models relating the basic dependence of initial variables X1 and X2 with the predicted conditions to achieve the best performance of porosity (meso- and macropore volume) in LTF organic aerogels were obtained. Based on the evaluation of the mathematical model it was established that for Х1 = 40,0 % and Х2 = 2,2 the maximum predicted value of the specific surface area of obtained organic aerogels is587 m2/g. For factors Х1 = 30 %, and Х2 = 2,54, the maximum value of the pore volume is about 2,16 cm3/g. Predicted optimal conditions to achieve the maximum values of surface area and pore volume were consistent with the experimental results, that determines the feasibility of their using to predict the results of synthesis of LTF aerogels with desired structural characteristics

Pages
212-220
Paper at repository of SibFU
http://elib.sfu-kras.ru/handle/2311/26407