Gas transport properties of segmented poly(ether siloxane urethane urea) membranes

D. Gomes*, Klaus-Victor Georg Peinemann, Suzana Nunes, W. Kujawski, J. Kozakiewicz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Scopus citations


Poly(ether siloxane urethane urea) with different polysiloxane contents were synthesized and characterized. The single gas permeation properties of poly(ether siloxane urethane urea) membranes were determined at 30 °C for O2, N2, CO2, CH4, n-C4H10. Their structures and gas permeation properties were compared. Significant correlation among the polysiloxane soft segment with the permeation properties was found. In addition, an analysis of the viability to use these membranes for n-C4H10/CH4 separation was made. A membrane with interesting properties such as higher n-C4H10/CH4 selectivity for a mixture of gases than for single gases was obtained, indicating a possibility of application of the poly(siloxane urethane) membranes for n-C4H10/CH4 separation.

Original languageEnglish (US)
Pages (from-to)747-753
Number of pages7
JournalJournal of Membrane Science
Issue number1-2
StatePublished - Sep 15 2006


  • Diffusion coefficients
  • Gas permeability
  • Polysiloxane
  • Polyurethane
  • Solubility

ASJC Scopus subject areas

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation


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