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RAS Chemistry & Material ScienceЖурнал неорганической химии Russian Journal of Inorganic Chemistry

  • ISSN (Print) 0044-457X
  • ISSN (Online) 3034-560X

THE IMPACT OF ALKYL CHAIN LENGTH ON THE PROPERTIES OF SiO-BASED AEROGELS

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PII
S3034560X25070129-1
DOI
10.7868/S3034560X25070129
Publication type
Article
Status
Published
Authors
I.O. Gozhikova
  • Affiliation: Institute of Physiologically Active Compounds at Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences
Volume/ Edition
Volume 70 / Issue number 7
Pages
959-968
Abstract
Modified silica aerogels were obtained by co-gelation of tetramethoxysilane and acylated 3-aminopropyl-trimethoxysilane (with the general formula (MeO)-Si-(CH)-NHCO-R), followed by supercritical drying in CO. Methyl esters of acetic, valeric, pelargonic, and stearic acids were used as acylating agents. The resulting aerogels were characterized using low-temperature nitrogen adsorption, scanning electron microscopy (SEM), and infrared spectroscopy (IR). It was shown that the specific surface area of the aerogels significantly depends on the length of the alkyl substituent in the modified silane and can vary from 40 to 1375 m/g. An increase in the length of the alkyl substituent also leads to increased hydrophobicity of the aerogel, up to the formation of superhydrophobic materials (contact angle is 163.7°).
Keywords
SiO-аэрогели модификация прекурсоров супергидрофобность пористость
Date of publication
15.07.2025
Year of publication
2025
Number of purchasers
0
Views
29

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