Solvent selection for manufacture of fluorinated polyimide composite membranes

Jian Jun Qin*, Tai-Shung Chung, Yiming Cao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Polysulfone (PSf) and five fluorinated polyimides were tested for their solubility with 24 organics or their mixtures in order to select a solvent suitable for developing a composite membrane consisting of an inexpensive substrate with an expensive selective layer of high-performance fluorinated polyimides for CO2/CH4 separation. The experimental results show that only nitromethane can dissolve 6F-Durene and 6F Durene-mPDA but not dissolve PSf. The manufacture of a 6F-Durene composite membrane using PSf as a substrate was attempted with the dip-coating method, which has not been previously reported. The PSf/6F-Durene composite membrane after repair with silicon rubber was defect free. There is a potential to manufacture a defect-free fluorinated polyimide composite hollow-fiber membrane.

Original languageEnglish (US)
Pages (from-to)8-13
Number of pages6
JournalDesalination
Volume193
Issue number1-3
DOIs
StatePublished - May 10 2006

Keywords

  • Composite membranes
  • Fluorinated polyimide
  • Hollow fiber
  • Nitromethane
  • Polysulfone

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)
  • Water Science and Technology
  • Mechanical Engineering

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