Effect of thermal treatment process on the structure of C/SiO2 composite aerogels

Carbon/silica composite (C/SiO ) aerogels were synthesized by using tetraethyl orthosilicate, 3-aminopropyltriethoxysilane, trimethylchlorosilane, resorcinol as the silicon and carbon sources, and ethanol as solvent, via the sol–gel process followed by supercritical ethanol drying and thermal treatm...

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Bibliographic Details
Published inScience and engineering of composite materials Vol. 29; no. 1; pp. 352 - 357
Main Authors Xu, Na, Shen, Xiao-dong
Format Journal Article
LanguageEnglish
Published Berlin De Gruyter 07.11.2022
Walter de Gruyter GmbH
Subjects
Aerogels
Aminopropyltriethoxysilane
carbon/silica composite aerogels
Diameters
Ethanol
Fourier transforms
FTIR spectrometers
Heat treatment
Infrared analysis
Infrared spectrometers
Silicon dioxide
Sol-gel processes
structure
Tetraethyl orthosilicate
thermal treatment
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Summary:Carbon/silica composite (C/SiO ) aerogels were synthesized by using tetraethyl orthosilicate, 3-aminopropyltriethoxysilane, trimethylchlorosilane, resorcinol as the silicon and carbon sources, and ethanol as solvent, via the sol–gel process followed by supercritical ethanol drying and thermal treatment. The influence of thermal treatment process on the structure of C/SiO composite aerogels was analyzed mainly and measured by Fourier transform infrared spectrometer, X-ray diffraction and nitrogen adsorption–desorption analysis. The results showed that the optimum thermal treatment temperature of C/SiO composite aerogels was 1,300°C. With the increase in the thermal treatment time, the linear shrinkage of the composite aerogels increased gradually, and the pore volume, average pore diameter and specific surface area of the composite aerogels increased first and then decreased.
ISSN:0792-1233
2191-0359
DOI:10.1515/secm-2022-0158