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Abstract <p>Modified silica aerogels have been obtained by co-gelation of tetramethoxysilane and acylated (3-aminopropyl)trimethoxysilane of general formula (MeO)<sub>3</sub>Si–(CH<sub>2</sub>)<sub>3</sub>–NHC(O)–R) followed by supercritical drying in CO<sub>2</sub>. Alkyl substituent elongation has been shown to increase aerogel hydrophobicity up to formation of superhydrophobic materials (contact angle is 163.7°). Specific surface area of the aerogels can vary from 40 to 1375 m<sup>2</sup>/g.</p>

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Impact of Alkyl Chain Length on the Properties of SiO2-Based Aerogels

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • I. O. Gozhikova,
  • E. A. Straumal,
  • S. Yu. Kottsov,
  • E. Yu. Postnova,
  • S. A. Lermontov

摘要

Abstract

Modified silica aerogels have been obtained by co-gelation of tetramethoxysilane and acylated (3-aminopropyl)trimethoxysilane of general formula (MeO)3Si–(CH2)3–NHC(O)–R) followed by supercritical drying in CO2. Alkyl substituent elongation has been shown to increase aerogel hydrophobicity up to formation of superhydrophobic materials (contact angle is 163.7°). Specific surface area of the aerogels can vary from 40 to 1375 m2/g.