Synthesis of a 12-membered cyclic siloxane possessing alkoxysilyl groups as a nanobuilding block and its use for preparation of gas permeable membranes
Synthesis of a 12-membered cyclic siloxane possessing alkoxysilyl groups as a nanobuilding block and its use for preparation of gas permeable membranes
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DOI：
10.1039/c7ra09380b
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发表时间：
2017-10
期刊：
影响因子：
3.9
通讯作者：
M. Yoshikawa;Hiroya Shiba;M. Kanezashi;H. Wada;Atsushi Shimojima;T. Tsuru;K. Kuroda
中科院分区：
文献类型：
--
作者：
M. Yoshikawa;Hiroya Shiba;M. Kanezashi;H. Wada;Atsushi Shimojima;T. Tsuru;K. Kuroda
通过对含有Si-Me和Si-O−基团作为侧基的12元环的有机硅基硅氧烷进行烷氧基硅烷化，合成了具有烷氧基甲硅烷基基团的12元环硅氧烷，作为基于硅氧烷的材料的纳米结构单元。环状结构不仅保留在水解和缩合反应（溶胶-凝胶过程）的烷氧基甲硅烷基，但也在干凝胶和膜制备过程中。衍生自12元环硅氧烷的干凝胶的缩合度高于衍生自烷氧基硅烷单体的干凝胶的缩合度，表明烷氧基硅烷化的环状低聚硅氧烷可用于控制硅氧烷网络。通过将水解溶液涂覆到多孔氧化铝管上来制备由环状硅氧烷组成的膜，以用于评价气体渗透性能。该膜对H2/SF6具有分子筛效应。
A 12-membered cyclic siloxane possessing alkoxysilyl groups was synthesized as a nanobuilding block for siloxane-based materials by the alkoxysilylation of organometallasiloxane containing a 12-membered ring with Si–Me and Si–O− groups as the side groups. The cyclic structure was retained not only in the hydrolysis and condensation reactions (sol–gel process) of the alkoxysilyl groups but also in the xerogel and membrane preparation processes. The degree of condensation of the xerogel derived from the 12-membered ring siloxane was higher than that derived from alkoxysilane monomers, indicating that the alkoxysilylated cyclic oligosiloxane is useful for controlling siloxane networks. A membrane composed of the cyclic siloxane was prepared by coating the hydrolyzed solution onto a porous alumina tube for evaluating the gas permeation properties. The membrane showed a molecular sieving effect for H2/SF6.