The observation of elongation dependent macrovoid evolution in single-and dual-layer asymmetric hollow fiber membranes

Kai Yu Wang, Dong Fei Li, Tai-Shung Chung*, Shing Bor Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

We have reported, for the first time, that macrovoids in asymmetric hollow fiber membranes may be completely eliminated at high elongational draws. The evolution of macrovoids vs. elongational draw was observed for both single- and dual-layer hollow fiber membranes. The number of macrovoids and the number of macrovoid layer decrease with an increase in elongational draw ratio, while the dimension of macrovoids varies with increasing elongational draw ratio until the macrovoids are fully eliminated. This study indicates that the elongational stress may play a much more important role than our original thoughts on hollow fiber membrane morphology.

Original languageEnglish (US)
Pages (from-to)4657-4660
Number of pages4
JournalChemical Engineering Science
Volume59
Issue number21
DOIs
StatePublished - Nov 1 2004

Keywords

  • Coagulation
  • Elongation
  • Hollow fiber
  • Macrovoids
  • Membranes
  • Morphology

ASJC Scopus subject areas

  • Chemical Engineering(all)

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