Fabrication of hydrophobic polymethylsilsesquioxane aerogels by a surfactant-free method using alkoxysilane with ionic group
Fabrication of hydrophobic polymethylsilsesquioxane aerogels by a surfactant-free method using alkoxysilane with ionic group
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DOI：
10.1016/j.jascer.2017.02.003
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发表时间：
2017-06-01
影响因子：
2.3
通讯作者：
Nakanishi, Kazuki
中科院分区：
文献类型：
--
作者：
Hayase, Gen;Nagayama, Shuya;Nakanishi, Kazuki
相分离控制是通过水性溶胶-凝胶反应制备多孔整体材料的重要因素。在这里，我们报道了一种无表面活性剂合成方法，通过共聚阳离子官能化烷氧基硅烷N-三甲氧基甲硅烷基丙基-N,N,N-三甲基氯化铵来获得疏水性聚甲基倍半硅氧烷气凝胶。所得材料具有与表面活性剂存在下制备的材料相当的低密度、高可见光透过率和高隔热性。 (C) 2017 日本陶瓷学会和韩国陶瓷学会。由 Elsevier B.V. 制作和托管。这是一篇遵循 CC BY-NC-ND 许可的开放获取文章
Phase separation control is an important factor to prepare a porous monolith by an aqueous sol-gel reaction. Here, we report a surfactant-free synthesis method to obtain hydrophobic polymethylsilsesquioxane aerogels by copolymerizing a cationic-functionalized alkoxysilane N-trimethoxysilylpropyl-N,N,N-trimethylammoniumchloride. The resultant materials have low-density, high visible-light transmittance, and high thermal insulating equivalent to those of prepared under the presence of surfactant. (C) 2017 The Ceramic Society of Japan and the Korean Ceramic Society. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license