Sol-gel synthesis of hybrid organic-inorganic materials. Hexylene- and phenylene-bridged polysiloxanes

Douglas A Loy, Gregory M. Jamison, Brigitta M. Baugher, Sharon A. Myers, Roger A. Assink, Kenneth J. Shea

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Abstract

highly cross-linked polysiloxanes were prepared by sol-gel polymerization of 1,6-bis(diethoxymethylsilyl)hexane (1) and 1,4-bis(diethoxymethylsilyl)benzene (2). Hydrolysis and condensation of 1 and 2 under acidic and basic conditions with 4 equiv of water led to the rapid formation of hexylene- and phenylene-bridged polysiloxane gels. The dry gels (xerogels) were intractable, insoluble materials that were noticeably hydrophobic, exhibiting no swelling in organic solvents or water. Most of the xerogels were high surface area, mesoporous materials. Hexylene-bridged polysiloxanes prepared under acidic conditions were always nonporous regardless of whether they were processed to afford xerogels or supercritically dried as aerogels. Hexylene-bridged polysiloxanes prepared under basic conditions and all of the phenylene-bridged polysiloxanes were mesoporous with surface areas as high as 1025 m2/g.

Original languageEnglish (US)
Pages (from-to)656-663
Number of pages8
JournalChemistry of Materials
Volume8
Issue number3
Publication statusPublished - Mar 1996
Externally publishedYes

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ASJC Scopus subject areas

  • Materials Science(all)
  • Materials Chemistry

Cite this

Loy, D. A., Jamison, G. M., Baugher, B. M., Myers, S. A., Assink, R. A., & Shea, K. J. (1996). Sol-gel synthesis of hybrid organic-inorganic materials. Hexylene- and phenylene-bridged polysiloxanes. Chemistry of Materials, 8(3), 656-663.