Synthesis, structure and gas permeation of polymerized ionic liquid graft copolymer membranes

Won Seok Chi, Seong Uk Hong, Bumsuk Jung, Sang Wook Kang, Yong Soo Kang, Jong Hak Kim

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Amphiphilic graft copolymers consisting of poly(vinyl chloride) (PVC) main chains and polymerized ionic liquid (PIL) side chains were synthesized via atom transfer radical polymerization (ATRP). Successful synthesis of the graft copolymers was confirmed using 1H nuclear magnetic resonance (1H NMR), Fourier-transform infrared (FT-IR) spectroscopy and X-ray diffraction (XRD) analysis. Differential scanning calorimetry (DSC), transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS) analysis revealed well-defined microphase-separated structures in the hydrophobic PVC and the hydrophilic PIL domains. Thus, the PVC-g-PIL graft copolymer membranes maintained good mechanical properties (i.e. a lower strength and greater elongation than PVC) without losing separation properties, as confirmed by universal tensile machine (UTM) and mixture gas permeation tests of CO2/N2 (50/50) at 35°C. As the content of PIL increased, the CO2 permeability increased with a slight decrease of selectivity. The CO2 permeability of PVC-g-PIL membrane with 65wt% of PIL reached 17.9Barrer at 35°C, which was approximately ten times higher than that of the pristine PVC membrane (1.7Barrer). Upon utilizing a PVC-g-PIL/IL composite with 15wt% IL, the CO2 permeability increased to 137.6Barrer by approximately 7.7-fold with a moderate decrease of selectivity.

Original languageEnglish
Pages (from-to)54-61
Number of pages8
JournalJournal of Membrane Science
Volume443
DOIs
Publication statusPublished - 2013 Sep 15

Fingerprint

Ionic Liquids
Graft copolymers
Polyvinyl Chloride
Ionic liquids
Permeation
Polyvinyl chlorides
copolymers
Gases
membranes
Membranes
Transplants
synthesis
liquids
gases
Permeability
permeability
selectivity
Vinyl Chloride
Scanning Transmission Electron Microscopy
Liquid membranes

All Science Journal Classification (ASJC) codes

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

Cite this

Chi, Won Seok ; Hong, Seong Uk ; Jung, Bumsuk ; Kang, Sang Wook ; Kang, Yong Soo ; Kim, Jong Hak. / Synthesis, structure and gas permeation of polymerized ionic liquid graft copolymer membranes. In: Journal of Membrane Science. 2013 ; Vol. 443. pp. 54-61.
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abstract = "Amphiphilic graft copolymers consisting of poly(vinyl chloride) (PVC) main chains and polymerized ionic liquid (PIL) side chains were synthesized via atom transfer radical polymerization (ATRP). Successful synthesis of the graft copolymers was confirmed using 1H nuclear magnetic resonance (1H NMR), Fourier-transform infrared (FT-IR) spectroscopy and X-ray diffraction (XRD) analysis. Differential scanning calorimetry (DSC), transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS) analysis revealed well-defined microphase-separated structures in the hydrophobic PVC and the hydrophilic PIL domains. Thus, the PVC-g-PIL graft copolymer membranes maintained good mechanical properties (i.e. a lower strength and greater elongation than PVC) without losing separation properties, as confirmed by universal tensile machine (UTM) and mixture gas permeation tests of CO2/N2 (50/50) at 35°C. As the content of PIL increased, the CO2 permeability increased with a slight decrease of selectivity. The CO2 permeability of PVC-g-PIL membrane with 65wt{\%} of PIL reached 17.9Barrer at 35°C, which was approximately ten times higher than that of the pristine PVC membrane (1.7Barrer). Upon utilizing a PVC-g-PIL/IL composite with 15wt{\%} IL, the CO2 permeability increased to 137.6Barrer by approximately 7.7-fold with a moderate decrease of selectivity.",
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Synthesis, structure and gas permeation of polymerized ionic liquid graft copolymer membranes. / Chi, Won Seok; Hong, Seong Uk; Jung, Bumsuk; Kang, Sang Wook; Kang, Yong Soo; Kim, Jong Hak.

In: Journal of Membrane Science, Vol. 443, 15.09.2013, p. 54-61.

Research output: Contribution to journalArticle

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