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

被引：100

作者：

Loy, DA ^{[1
]}

Jamison, GM ^{[1
]}

Baugher, BM ^{[1
]}

Myers, SA ^{[1
]}

Assink, RA ^{[1
]}

Shea, KJ ^{[1
]}

机构：

[1] UNIV CALIF IRVINE,DEPT CHEM,IRVINE,CA 92717

来源：

CHEMISTRY OF MATERIALS | 1996年 / 8卷 / 03期

关键词：

D O I：

10.1021/cm950067z

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

New 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 m(2)/g.

引用

页码：656 / 663

页数：8

共 33 条

[1]

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[2]

Brinker C. J., 1990, SOL GEL SCI PHYS CHE, P908

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