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.

中文翻译：

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双[3-(三乙氧基甲硅烷基)丙基]胺制备用于海水淡化的桥联聚倍半硅氧烷膜

含胺单元的桥联聚倍半硅氧烷膜是由双 [3-(三乙氧基甲硅烷基)丙基]胺 (BTESPA) 通过溶胶-凝胶工艺制备的，该工艺包括在中性条件下通过 BTESPA 的水解/缩聚聚合形成溶胶和煅烧磺化聚醚砜支撑膜上的溶胶。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 2000 ppm NaCl 水溶液对由此获得的多孔 BTESPA 基膜进行反渗透 (RO) 实验，以检查其水脱盐性能。使用含铵膜可实现最大液体渗透率 (1.2 × 10−13 m3/m2·Pa·s) 和 NaCl 截留率 (97%)。