Preparation of Bridged Polysilsesquioxane Membranes from Bis[3-(triethoxysilyl)propyl]amine for Water Desalination
Preparation of Bridged Polysilsesquioxane Membranes from Bis[3-(triethoxysilyl)propyl]amine for Water Desalination
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双[3-(三乙氧基硅基)丙基]胺制备桥联聚倍半硅氧烷膜用于海水淡化
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发表时间：
2017
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通讯作者：
J. Ohshita
中科院分区：
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作者：
Kazuki Yamamoto;S. Koge;K. Sasahara;T. Mizumo;Y. Kaneko;M. Kanezashi;T. Tsuru;J. Ohshita
以双[3-(三乙氧基硅基)丙基]胺(BTESPA)为原料，采用溶胶-凝胶法制备了含胺单元的桥联聚倍半硅氧烷膜，该工艺包括在中性条件下通过BTESPA的水解/缩聚形成溶胶，并在磺化聚醚砜支撑膜上煅烧该溶胶的流延膜。 BTESPA 的类似处理，包括在酸性条件下形成溶胶，提供了带有铵单元的膜。使用2000ppm NaCl水溶液对由此获得的基于BTESPA的多孔膜进行反渗透(RO)实验以检查其水脱盐性能。使用含铵膜实现了最大液体渗透性（1.2 × 10−13 m3/m2·Pa·s）和 NaCl 截留率（97%）。
Bridged polysilsesquioxane membranes containing amine units were prepared from bis[3-(triethoxysilyl)propyl]amine (BTESPA) by a sol-gel process, which consisted of sol formation by hydrolysis/condensation polymerization of BTESPA under neutral conditions and calcination of cast films of the sols on sulfonated polyethersulfone support membrane. A similar treatment of BTESPA, including sol formation under acidic conditions, afforded membrane with ammonium units. Thus-obtained porous BTESPA-based membrane was subjected to reverse osmosis (RO) experiments using 2000 ppm aqueous NaCl solution to examine its water desalination properties. Maximal liquid permeance (1.2 × 10−13 m3/m2·Pa·s) and NaCl rejection (97%) were achieved using the ammonium-containing membrane.