Exploring Torlon/P84 co-polyamide-imide blended hollow fibers and their chemical cross-linking modifications for pervaporation dehydration of isopropanol

被引：50

作者：

Teoh, May May ^{[1
]}

Chung, Tai-Shung ^{[1
]}

Wang, Kai Yu ^{[1
]}

Guiver, Michael D. ^{[2
]}

机构：

[1] Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 119260, Singapore

[2] Natl Res Council Canada, Inst Chem Proc & Environm Technol, Ottawa, ON, Canada

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2008年 / 61卷 / 03期

关键词：

Torlon; Torlon/P84 co-polyamide-imide blends; cross-linking; dehydration of isopropanol; hollow fiber;

D O I：

10.1016/j.seppur.2007.12.002

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A research study has been conducted to fabricate and chemically modify Torlon (R) 4000T and Torlon/P84 co-polyamide-imide blended hollow fibers as new materials for the dehydration of isopropanol (IPA). It has been found that Torlon/P84 blends are miscible, as confirmed through the single glass transition temperatures (T(g)s) detected by differential scanning calorimetry (DSC). Both pure and blended hollow fibers fabricated from the dry-jet wet-spinning process do not show sufficient resistance to suppress water and IPA induced swelling, whereas cross-linked pure Torlon hollow fibers show only marginal improvement. However, the Torlon/P84 blended fibers display enhanced separation performance after chemical cross-linking modification with the aid of p-xylenediamine. It is believed that the p-xylenediamine induced cross-linking reactions result in greater chain packing and the reduction of free volume. The highest separation factor obtained was 185 +/- 8 for the 85/15 wt.% IPA/H2O feed solution and the total permeation flux obtained was 1000 +/- 45 g/m(2) h. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：404 / 413

页数：10