Synthesis and gas permeation properties of amphiphilic graft copolymer membranes

Sung Hoon Ahn, Jin Ah Seo, Jong Hak Kim, Youngdeok Ko, Seong Uk Hong

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Amphiphilic graft copolymers comprising poly(vinyl chloride) (PVC) main chains and poly(oxyethylene methacrylate) (POEM) side chains, i.e. PVC-g-POEM, were synthesized via atom transfer radical polymerization (ATRP) using direct initiation of the secondary chlorines of PVC. Successful synthesis of the graft copolymer was confirmed using 1H NMR and FT-IR spectroscopy. TEM and DSC analysis revealed the well-defined microphase-separated structure of the graft copolymer into hydrophobic PVC and hydrophilic POEM domains. All the membranes exhibited amorphous structures and the intersegmental d-spacing were increased with the grafting degree, as characterized by XRD analysis. Permeation experimental results using a CO2/N2 (50/50) mixture indicated that as an amount of POEM in a copolymer increased, CO2 permeability increased dramatically without the sacrifice of selectivity. For example, the CO2 permeability [1 × 10-8 cm3(STP) cm/cm2 s cmHg (100 Barrer)] of PVC-g-POEM with 70 wt% of POEM at 25 °C was about 70 times higher than that of the pure PVC membrane [1.45 × 10-10 cm3(STP) cm/cm2 s cmHg (1.45 Barrer)].

Original languageEnglish
Pages (from-to)128-133
Number of pages6
JournalJournal of Membrane Science
Volume345
Issue number1-2
DOIs
Publication statusPublished - 2009 Dec 1

Fingerprint

Graft copolymers
Polyvinyl Chloride
Permeation
Polyvinyl chlorides
copolymers
Gases
membranes
Membranes
Transplants
Methacrylates
synthesis
gases
permeability
Permeability
chlorine
Vinyl Chloride
polymerization
selectivity
chlorides
spacing

All Science Journal Classification (ASJC) codes

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

Cite this

Ahn, Sung Hoon ; Seo, Jin Ah ; Kim, Jong Hak ; Ko, Youngdeok ; Hong, Seong Uk. / Synthesis and gas permeation properties of amphiphilic graft copolymer membranes. In: Journal of Membrane Science. 2009 ; Vol. 345, No. 1-2. pp. 128-133.
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Synthesis and gas permeation properties of amphiphilic graft copolymer membranes. / Ahn, Sung Hoon; Seo, Jin Ah; Kim, Jong Hak; Ko, Youngdeok; Hong, Seong Uk.

In: Journal of Membrane Science, Vol. 345, No. 1-2, 01.12.2009, p. 128-133.

Research output: Contribution to journalArticle

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AB - Amphiphilic graft copolymers comprising poly(vinyl chloride) (PVC) main chains and poly(oxyethylene methacrylate) (POEM) side chains, i.e. PVC-g-POEM, were synthesized via atom transfer radical polymerization (ATRP) using direct initiation of the secondary chlorines of PVC. Successful synthesis of the graft copolymer was confirmed using 1H NMR and FT-IR spectroscopy. TEM and DSC analysis revealed the well-defined microphase-separated structure of the graft copolymer into hydrophobic PVC and hydrophilic POEM domains. All the membranes exhibited amorphous structures and the intersegmental d-spacing were increased with the grafting degree, as characterized by XRD analysis. Permeation experimental results using a CO2/N2 (50/50) mixture indicated that as an amount of POEM in a copolymer increased, CO2 permeability increased dramatically without the sacrifice of selectivity. For example, the CO2 permeability [1 × 10-8 cm3(STP) cm/cm2 s cmHg (100 Barrer)] of PVC-g-POEM with 70 wt% of POEM at 25 °C was about 70 times higher than that of the pure PVC membrane [1.45 × 10-10 cm3(STP) cm/cm2 s cmHg (1.45 Barrer)].

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