Pervaporation of Methanol鈥揈thylene Glycol Mixture over Organic鈥揑norganic Hybrid Membranes

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• 作者：Qiu Gen Zhang ; Guang Lu Han ; Wen Wei Hu ; Ai Mei Zhu ; Qing Lin Liu
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：June 5, 2013
• 年：2013
• 卷：52
• 期：22
• 页码：7541-7549
• 全文大小：553K
• 年卷期：v.52,no.22(June 5, 2013)
• ISSN：1520-5045

文摘

New organic鈥搃norganic hybrid membranes prepared from chitosan, polyvinylpyrrolidone (PVP), and 1,2-bis(triethoxysilyl)ethane (BTEE) were used for pervaporation separation of methanol鈥揺thylene glycol (EG) mixtures. A semi-interpenetrating network structure at the molecular scale was formed via condensation between chitosan and BTEE in the hybrid membranes. The self-condensation reaction of BTEE took place to form silica nanoparticles. The as-prepared hybrid membranes have denser packing of polymer chains, and higher mechanical strength than their untreated blended counterparts. BTEE hybridization efficiently decreased the membrane swelling in methanol鈥揈G mixture, and enhanced methanol sorption selectivity. Effect of BTEE loading, feed temperature, and feed content on pervaporation performance was investigated in detail. Methanol/EG selectivity increased significantly, whereas membrane permeance decreased, with increasing BTEE loading. The membrane containing 10.4 wt % BTEE has the highest separation factor of 6129 for separation of methanol (6 wt %)鈥揈G mixture at 60 掳C.