Development of high-performance polysulfone/poly(4-vinylpyridine) composite hollow fibers for CO2/CH4 separation

Jian Jun Qin*, Tai Shung Chung

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


High-performance polysulfone (PSf)/poly (4-vinylpyridine) (4-PVP)/silicon rubber (SR) multilayer composite membranes were developed for CO2/CH4 separation. PSf hollow-fiber substrates with different pore sizes were manufactured by varying the concentration of nonsolvent additive in the spinning dope. PSf/4-PVP/SR multilayer composite membranes were prepared using dip-coating. The pore size of the PSf substrate increased with an increase of the nonsolvent additive. Selectivity of a composite membrane for CO2/CH4 increased with decreasing pore size of the substrate. The pre-wetting agent played an important role in preventing the penetration of the coating material into the substrate with large pores, but did not show a significant effect on a substrate with small pores. A high-performance multilayer composite membrane with a CO2/CH4 selectivity of 29 and CO2 permeance of 92 GPU was obtained.

Original languageEnglish (US)
Pages (from-to)112-116
Number of pages5
Issue number1-3
StatePublished - May 10 2006
Externally publishedYes


  • CO/CH separation
  • Composite hollow fibers
  • Multilayer membranes
  • Poly (4-vinylpyridine)
  • Polysulfone

ASJC Scopus subject areas

  • General Chemistry
  • Water Science and Technology
  • General Chemical Engineering
  • Mechanical Engineering
  • General Materials Science


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