Chitosan/polyvinylpyrrolidone-silica hybrid membranes for pervaporation separation of methanol/ethylene glycol azeotrope

被引：17

作者：

Zhang, Qiu Gen ^{[1
]}

Hu, Wen Wei ^{[1
]}

Liu, Qing Lin ^{[1
]}

Zhu, Ai Mei ^{[1
]}

机构：

[1] Xiamen Univ, Coll Chem & Chem Engn, Natl Engn Lab Green Chem Prod Alcohols Ethers & E, Dept Chem & Biochem Engn, Xiamen 361005, Peoples R China

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2013年 / 129卷 / 06期

关键词：

membranes; separation techniques; composites; BLEND MEMBRANES; ETHYLENE-GLYCOL; CHITOSAN MEMBRANES; COMPOSITE MEMBRANES; COMPLEX MEMBRANES; DEHYDRATION; MIXTURES; ETHANOL; PERFORMANCE;

D O I：

10.1002/app.39058

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Chitosan (CS)/polyvinylpyrrolidone (PVP)-silica hybrid membranes are prepared to separate the methanol/ethylene glycol (EG) azeotrope. These hybrid membranes are formed in semi-interpenetrating network structure at the molecular scale via sol-gel reactions between CS and tetraethoxysilane (TEOS). The physico-chemical property and morphology of the as-prepared membranes are investigated in detail. They have lower crystallinity, higher thermal stability, and denser structure than the pristine CS membrane and its blending counterpart. The as-prepared hybrid membranes demonstrate excellent performances and a great potential in pervaporation separation of methanol/EG. Silica-hybridization depressed the swelling degree of membranes in the azeotrope, and remarkably enhanced methanol sorption selectivity. The membrane containing 7.77 wt % PVP and 14.52 wt % TEOS has a permeation flux of 0.119 kg m-2 h-1 and separation factor of 1899. (c) 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

引用

页码：3178 / 3184

页数：7

共 27 条

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