Organic-inorganic hybrid poly(silsesquioxane) monoliths with controlled macro- and mesopores
Organic-inorganic hybrid poly(silsesquioxane) monoliths with controlled macro- and mesopores
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DOI：
10.1039/b508415f
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发表时间：
2005-01-01
影响因子：
--
通讯作者：
Kanamori, K
中科院分区：
文献类型：
--
作者：
Nakanishi, K;Kanamori, K
硅烷基有机-无机杂化单体具有明确的大孔和/或中孔，通过溶胶-凝胶工艺合成，伴随着聚合诱导相分离。利用烷基三烷氧基硅烷和烷基桥接烷氧基硅烷，从宏观孔隙度（基于相分离）和介孔度（表面活性剂的超分子模板化）的角度对两种不同类型的有机硅氧烷网络进行了表征。端烷基聚硅氧烷网络表现出明显的表面疏水性和机械柔韧性，而端烷基聚硅氧烷网络在表面亲水性、机械刚性和介孔形成能力方面与四烷氧基硅烷制备的网络表现得更为相似。嵌入在凝胶骨架中的介孔的超分子模板（包括定义良好的大孔网络）已被证明可以提供各种层次设计的大介孔杂化材料。
Siloxane-based organic-inorganic hybrid monoliths with well-defined macropores and/or mesopores have been synthesized by a sol-gel process, accompanied by polymerization-induced phase separation. Using aklyltrialkoxysilanes and alkylene-bridged alkoxysilanes, two different categories of organosiloxane networks have been characterized in view of macroporosity (based on phase separation) and mesoporosity (supramolecularly templated by surfactants). While the alkyl-terminated poly(siloxane) networks exhibit substantial surface hydrophobicity accompanied by mechanical flexibility, the alkylene-bridged networks behave much more similarly to those prepared from tetraalkoxysilanes with regard to surface hydrophilicity, mechanical rigidness and mesopore-forming ability. The supramolecular templating of mesopores embedded in the gel skeletons (which comprise well-defined macroporous networks) has proven to give a wide variety of hierarchically-designed macro-mesoporous hybrid materials.