Organically modified silica aerogel with different functional silylating agents and effect on their physico-chemical properties

Satish A. Mahadik, F. Pedraza, V. G. Parale, Hyung Ho Park

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

In this paper, we have successfully focused on a hydrophobic silica aerogels synthesis by the ambient drying of silica gels and the silylation with mono-, di-, and tri-functional agents was studied to improve physico-chemical properties of the aerogels. Silylated silica aerogels with water contact angles 161 ± 2°, 152 ± 3°, 147 ± 3° were obtained using trimethylchlorosilane, dimethyldichlorosilane, and methyltrimethoxysilane as a mono-, di- and tri-functional silylation reagents, respectively. The prepared mono-functional silylated silica aerogels exhibited relatively high thermal stability, low thermal conductivity, transparency, high porosity, and enhanced superhydrophobicity with low surface free energy making them suitable as multifunctional for many domestic and industrial applications. Our mono-functional silylated silica aerogels showed superior physico-chemical properties compared with di- and tri-functional silylated silica aerogels.

Original languageEnglish
Pages (from-to)164-171
Number of pages8
JournalJournal of Non-Crystalline Solids
Volume453
DOIs
Publication statusPublished - 2016 Dec 1

Fingerprint

Aerogels
aerogels
Silicon Dioxide
chemical properties
Chemical properties
Silica
silicon dioxide
Silica Gel
Silica gel
silica gel
Transparency
drying
Free energy
Industrial applications
Contact angle
reagents
Thermal conductivity
Drying
Thermodynamic stability
thermal stability

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

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abstract = "In this paper, we have successfully focused on a hydrophobic silica aerogels synthesis by the ambient drying of silica gels and the silylation with mono-, di-, and tri-functional agents was studied to improve physico-chemical properties of the aerogels. Silylated silica aerogels with water contact angles 161 ± 2°, 152 ± 3°, 147 ± 3° were obtained using trimethylchlorosilane, dimethyldichlorosilane, and methyltrimethoxysilane as a mono-, di- and tri-functional silylation reagents, respectively. The prepared mono-functional silylated silica aerogels exhibited relatively high thermal stability, low thermal conductivity, transparency, high porosity, and enhanced superhydrophobicity with low surface free energy making them suitable as multifunctional for many domestic and industrial applications. Our mono-functional silylated silica aerogels showed superior physico-chemical properties compared with di- and tri-functional silylated silica aerogels.",
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Organically modified silica aerogel with different functional silylating agents and effect on their physico-chemical properties. / Mahadik, Satish A.; Pedraza, F.; Parale, V. G.; Park, Hyung Ho.

In: Journal of Non-Crystalline Solids, Vol. 453, 01.12.2016, p. 164-171.

Research output: Contribution to journalArticle

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