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Solvent selection for manufacture of fluorinated polyimide composite membranes

Authors
Journal
Desalination
0011-9164
Publisher
Elsevier
Publication Date
Volume
193
Identifiers
DOI: 10.1016/j.desal.2005.04.136
Keywords
  • Fluorinated Polyimide
  • Composite Membranes
  • Polysulfone
  • Hollow Fiber
  • Nitromethane

Abstract

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 CO 2/CH 4 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.

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