Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 18, Issue 2, Pages 207-213Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b712553d
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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 Si-29-NMR spectroscopy. Mechanical properties were measured using nanoindentation.
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