Novel PVA-silica nanocomposite membrane for pervaporative dehydration of ethylene glycol aqueous solution

被引：122

作者：

Guo, Ruili ^{[1
]}

Ma, Xiaocong ^{[1
]}

Hu, Changlai ^{[1
]}

Jiang, Zhongyi ^{[1
]}

机构：

[1] Tianjin Univ, Key Lab Green Chem Technol, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China

来源：

POLYMER | 2007年 / 48卷 / 10期

关键词：

poly(vinyl alcohol)-silica; nanocomposite membranes; pervaporation dehydration;

D O I：

10.1016/j.polymer.2007.03.035

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

To effectively suppress the swelling of poly(vinyl alcohol) (PVA) membrane, polymer-inorganic nanocomposite membranes composed of PVA and gamma-mercaptopropyltrimethoxysilane (MPTMS) were prepared by in situ sol-gel technique for pervaporative separation of water-ethylene glycol (EG) mixtures. Effects of the types of catalyst for sol-gel process and MPTMS content on the physical and chemical structure of PVA-silica nanocomposite membranes (designated as PVA-MPTMS hereafter) were investigated by 29 Si NMR, FTIR, SEM, XRD and TGA-DTA. Due to the formation of more compact crosslinked structure, nanocomposite membranes exhibited enhanced thermal stability. It was found that when 50 wt% of MPTMS was incorporated into PVA, the nanocomposite membranes possessed optimum pervaporation performance for 80 wt% EG aqueous solution at 70 degrees C. Unexpectedly, there was no improvement in the pervaporation performance of PVA-MPTMS nanocomposite membranes after mercapto group was oxidized into sulfonic group. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：2939 / 2945

页数：7

共 25 条

[11] Direct syntheses of ordered SBA-15 mesoporous silica containing sulfonic acid groups [J].