Organo-modified silica aerogels and implications for material hydrophobicity and mechanical properties

Laura Martín; J. Oriol Ossó; Susagna Ricart; Anna Roig; Olga García; Roberto Sastre

doi:10.1039/b712553d

Organo-modified silica aerogels and implications for material hydrophobicity and mechanical properties

Laura Martín, J. Oriol Ossó, Susagna Ricart, Anna Roig, Olga García, Roberto Sastre

Department of Chemistry

Research output: Contribution to journal › Article › Research › peer-review

42 Citations (Scopus)

Abstract

Two types of organo-modified silica gels, with the organic groups trimethoxymethylsilane (TRIMOS) and 3-(trimethoxysilyl)propyl methacrylate (TMSPMA), have been synthesized. The wet gels were dried by supercritical evacuation of the solvent. The materials with enhanced performance were those hybridized with TRIMOS and dried above the critical conditions of methanol. Such aerogels were found to be hydrophobic with mechanically improved properties whilst still maintaining the characteristic transparency of pure silica aerogels. The condensation degree and the number of superficial hydroxyl groups were determined from solid-state 29Si-NMR spectroscopy. Mechanical properties were measured using nanoindentation. © The Royal Society of Chemistry 2008.

Original language	English
Pages (from-to)	207-213
Journal	Journal of Materials Chemistry
Volume	18
Issue number	2
DOIs	https://doi.org/10.1039/b712553d
Publication status	Published - 1 Jan 2008

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title = "Organo-modified silica aerogels and implications for material hydrophobicity and mechanical properties",

abstract = "Two types of organo-modified silica gels, with the organic groups trimethoxymethylsilane (TRIMOS) and 3-(trimethoxysilyl)propyl methacrylate (TMSPMA), have been synthesized. The wet gels were dried by supercritical evacuation of the solvent. The materials with enhanced performance were those hybridized with TRIMOS and dried above the critical conditions of methanol. Such aerogels were found to be hydrophobic with mechanically improved properties whilst still maintaining the characteristic transparency of pure silica aerogels. The condensation degree and the number of superficial hydroxyl groups were determined from solid-state 29Si-NMR spectroscopy. Mechanical properties were measured using nanoindentation. {\textcopyright} The Royal Society of Chemistry 2008.",

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AU - Martín, Laura

AU - Ossó, J. Oriol

AU - Ricart, Susagna

AU - Roig, Anna

AU - García, Olga

AU - Sastre, Roberto

PY - 2008/1/1

Y1 - 2008/1/1

N2 - Two types of organo-modified silica gels, with the organic groups trimethoxymethylsilane (TRIMOS) and 3-(trimethoxysilyl)propyl methacrylate (TMSPMA), have been synthesized. The wet gels were dried by supercritical evacuation of the solvent. The materials with enhanced performance were those hybridized with TRIMOS and dried above the critical conditions of methanol. Such aerogels were found to be hydrophobic with mechanically improved properties whilst still maintaining the characteristic transparency of pure silica aerogels. The condensation degree and the number of superficial hydroxyl groups were determined from solid-state 29Si-NMR spectroscopy. Mechanical properties were measured using nanoindentation. © The Royal Society of Chemistry 2008.

AB - Two types of organo-modified silica gels, with the organic groups trimethoxymethylsilane (TRIMOS) and 3-(trimethoxysilyl)propyl methacrylate (TMSPMA), have been synthesized. The wet gels were dried by supercritical evacuation of the solvent. The materials with enhanced performance were those hybridized with TRIMOS and dried above the critical conditions of methanol. Such aerogels were found to be hydrophobic with mechanically improved properties whilst still maintaining the characteristic transparency of pure silica aerogels. The condensation degree and the number of superficial hydroxyl groups were determined from solid-state 29Si-NMR spectroscopy. Mechanical properties were measured using nanoindentation. © The Royal Society of Chemistry 2008.

U2 - 10.1039/b712553d

DO - 10.1039/b712553d

M3 - Article

VL - 18

SP - 207

EP - 213

JO - Journal of Materials Chemistry

JF - Journal of Materials Chemistry

SN - 0959-9428

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