Nanocomposite silver polymer electrolytes as facilitated olefin transport membranes

Sang Wook Kang, Jong Hak Kim, Kookheon Char, Jongok Won, Yong Soo Kang

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

Solid-state silver polymer electrolyte membranes containing AgNO3 dissolved in poly(2-ethyl-2-oxazoline) (POZ) as an olefin carrier are not efficient for the separation of olefin/paraffin mixtures (selectivity ∼1). The addition of fumed silica nanoparticles into the POZ/AgNO3 complex membranes, however, resulted in a surprisingly significant enhancement of the permeance and selectivity (higher than 80) for propylene/propane mixtures. These enhancements are explained in terms of the silver ion activity in olefin coordination. FT-IR, X-ray photoelectron spectroscopy (XPS) and FT-Raman demonstrate that the silver ion activity continuously increases by Lewis acid-base interactions upon incorporation of the silica nanoparticles up to 0.1 mole ratio of silica, above which it abruptly decreases. Furthermore, the structural change of polymer electrolyte membranes took place by the presence of nanoparticles, supported by the Tg measurement.

Original languageEnglish
Pages (from-to)102-107
Number of pages6
JournalJournal of Membrane Science
Volume285
Issue number1-2
DOIs
Publication statusPublished - 2006 Nov 15

Fingerprint

Nanocomposites
Alkenes
Silver
Silicon Dioxide
Nanoparticles
Electrolytes
alkenes
Olefins
nanocomposites
Polymers
silver
Silica
electrolytes
silicon dioxide
membranes
Membranes
nanoparticles
polymers
selectivity
Lewis Bases

All Science Journal Classification (ASJC) codes

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

Cite this

Kang, Sang Wook ; Kim, Jong Hak ; Char, Kookheon ; Won, Jongok ; Kang, Yong Soo. / Nanocomposite silver polymer electrolytes as facilitated olefin transport membranes. In: Journal of Membrane Science. 2006 ; Vol. 285, No. 1-2. pp. 102-107.
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Nanocomposite silver polymer electrolytes as facilitated olefin transport membranes. / Kang, Sang Wook; Kim, Jong Hak; Char, Kookheon; Won, Jongok; Kang, Yong Soo.

In: Journal of Membrane Science, Vol. 285, No. 1-2, 15.11.2006, p. 102-107.

Research output: Contribution to journalArticle

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T1 - Nanocomposite silver polymer electrolytes as facilitated olefin transport membranes

AU - Kang, Sang Wook

AU - Kim, Jong Hak

AU - Char, Kookheon

AU - Won, Jongok

AU - Kang, Yong Soo

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AB - Solid-state silver polymer electrolyte membranes containing AgNO3 dissolved in poly(2-ethyl-2-oxazoline) (POZ) as an olefin carrier are not efficient for the separation of olefin/paraffin mixtures (selectivity ∼1). The addition of fumed silica nanoparticles into the POZ/AgNO3 complex membranes, however, resulted in a surprisingly significant enhancement of the permeance and selectivity (higher than 80) for propylene/propane mixtures. These enhancements are explained in terms of the silver ion activity in olefin coordination. FT-IR, X-ray photoelectron spectroscopy (XPS) and FT-Raman demonstrate that the silver ion activity continuously increases by Lewis acid-base interactions upon incorporation of the silica nanoparticles up to 0.1 mole ratio of silica, above which it abruptly decreases. Furthermore, the structural change of polymer electrolyte membranes took place by the presence of nanoparticles, supported by the Tg measurement.

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