Synthesis and characterization of hydrophobic silica nanocomposites

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Abstract

Hydrophobically modified silica nanocomposites have been prepared using a low temperature sol-gel process. In this study, an alkyltriethoxysilane derivative, hexdecyltrimethoxysilane (HDTMS), was co-condensed with tetraethoxyorthosilicate (TEOS) with and without a cross-linking agent, 3-glycidoxypropyltrimethoxysilane (GPTMS), to produce the modified composites. The hydrophobic properties were determined using contact angle measurement. FESEM observations revealed a semispherical nanostructure of the composites with grain size of about 50-75 nm in diameter. The chemical modification was studied by FTIR and EDX, whereas the physicothermal properties were analyzed by DSC and TGA. These long-chain alkyl modified silica nanocomposites are promising materials for use in hydrophobic and water-resistant applications.
Original languageEnglish
Pages (from-to)5368-5371
Number of pages4
JournalApplied Surface Science
Volume252
Issue number15
DOIs
Publication statusPublished - 30 May 2006

Keywords

  • Coatings
  • Hydrophobicity
  • Nanocomposites
  • Nanophase-materials
  • Sol-gel processing

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics

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