Olefin-induced dissolution of silver salts physically dispersed in inert polymers and their application to olefin/paraffin separation

Jong Hak Kim, Jongok Won, Yong Soo Kang

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46 Citations (Scopus)


Remarkably high-performance membranes are developed by physically dispersing silver ionic aggregates in inert polymer such as poly(dimethyl siloxane) (PDMS). The mixed gas selectivity for propylene/propane reaches nearly 200, to our knowledge the highest value ever reported for the solid state, whereas other membranes reported up to now show ∼60 of propylene/propane selectivity. Physical dispersion of silver salt in the inert polymers without specific interaction is observed by FT-IR, FT-Raman and wide angle X-ray scattering (WAXS). It is also found that the crystalline silver ionic aggregates are completely dissolved under the propylene environment, representing that propylene is a good ligand for coordination to silver ions. The inert membranes are functional at any loading level and hence a threshold carrier concentration does not exist.

Original languageEnglish
Pages (from-to)403-407
Number of pages5
JournalJournal of Membrane Science
Issue number2
Publication statusPublished - 2004 Oct 1


All Science Journal Classification (ASJC) codes

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

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