Bridged polysilsesquioxanes: A novel class of hybrid organic-inorganic materials
- Sandia National Labs., Albuquerque, NM (United States)
- California Univ., Irvine, CA (United States). Dept. of Chemistry
- Du Pont de Nemours (E.I.) and Co., Wilmington, DE (United States). Central Research and Development Dept.
Aryl-, ethynyl- and alkyl-bridged polysilsesquioxanes were prepared by the hydrolysis and condensation of the respective bridged triethoxysilanes under both acidic and basic conditions. Gelation of the resulting sols can take place at concentrations as low as 0.02 M in tetrahydrofuran. The gels can be air dried to afford xerogels or extracted with supercritical carbon dioxide to give high surface area aerogels. The materials were characterized by solid state {sup 13}C and {sup 29}Si CP MAS NMR spectroscopies, gas sorption porosimetry, and thermal gravimetric analysis. The bridged polysilsesquioxanes offer the opportunity to prepare hybrid organic-inorganic materials with properties unique from other siloxane network materials and silica gels.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 10145657
- Report Number(s):
- SAND-92-1000C; CONF-920402-6; ON: DE92013678
- Resource Relation:
- Conference: 1992 Material Research Society (MRS) spring meeting,San Francisco, CA (United States),27 Apr - 2 May 1992; Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
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