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

May May Teoh, Tai-Shung Chung*, Kai Yu Wang, Michael D. Guiver

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

A research study has been conducted to fabricate and chemically modify Torlon® 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 (Tgs) 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/m2 h.

Original languageEnglish (US)
Pages (from-to)404-413
Number of pages10
JournalSeparation and Purification Technology
Volume61
Issue number3
DOIs
StatePublished - Jul 15 2008

Keywords

  • Cross-linking
  • Dehydration of isopropanol
  • Hollow fiber
  • Torlon
  • Torlon/P84 co-polyamide-imide blends

ASJC Scopus subject areas

  • Analytical Chemistry
  • Filtration and Separation

Fingerprint Dive into the research topics of 'Exploring Torlon/P84 co-polyamide-imide blended hollow fibers and their chemical cross-linking modifications for pervaporation dehydration of isopropanol'. Together they form a unique fingerprint.

Cite this