Morphology control of asymmetric membranes by UV irradiation on polyimide dope solution

Jong Suk Kang, Jongok Won, Hyun Chae Park, Un Young Kim, Yong Soo Kang, Young Moo Lee

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The membrane morphology was readily controlled by the gelation of dope solution before immersion into a coagulation medium. In particular, macrovoid-free, sponge-like integrally skinned asymmetric polyimide membranes with improved selectivity were obtained by the chemical gelation of cast solution film. Cross-linking was performed by ultraviolet irradiation for benzophenone containing polyimide dope solution. Cross-linking maintained the structure of cast solution film until the moment of immersion into a nonsolvent bath. Macrovoid decreases with irradiation time on the cast solution film. Sponge-like integrally skinned asymmetric membranes were obtained with sufficient irradiation. Gas permselectivity increased significantly with the progress of cross-linking on the cast solution film. Membrane morphology and subsequent transport properties can be controlled both by the extent of cross-linking and by the concentration of dope solution. (C) 2000 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)229-235
Number of pages7
JournalJournal of Membrane Science
Volume169
Issue number2
DOIs
StatePublished - 2000 May 1

Fingerprint

polyimides
Polyimides
Irradiation
membranes
Membranes
irradiation
casts
gelation
Porifera
Immersion
Gelation
submerging
coagulation
Coagulation
Baths
Transport properties
baths
transport properties
Gases
selectivity

Keywords

  • Chemical gelation
  • Phase inversion
  • Polyimide membrane
  • UV irradiation

Cite this

Kang, Jong Suk ; Won, Jongok ; Park, Hyun Chae ; Kim, Un Young ; Kang, Yong Soo ; Lee, Young Moo. / Morphology control of asymmetric membranes by UV irradiation on polyimide dope solution. In: Journal of Membrane Science. 2000 ; Vol. 169, No. 2. pp. 229-235.
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abstract = "The membrane morphology was readily controlled by the gelation of dope solution before immersion into a coagulation medium. In particular, macrovoid-free, sponge-like integrally skinned asymmetric polyimide membranes with improved selectivity were obtained by the chemical gelation of cast solution film. Cross-linking was performed by ultraviolet irradiation for benzophenone containing polyimide dope solution. Cross-linking maintained the structure of cast solution film until the moment of immersion into a nonsolvent bath. Macrovoid decreases with irradiation time on the cast solution film. Sponge-like integrally skinned asymmetric membranes were obtained with sufficient irradiation. Gas permselectivity increased significantly with the progress of cross-linking on the cast solution film. Membrane morphology and subsequent transport properties can be controlled both by the extent of cross-linking and by the concentration of dope solution. (C) 2000 Elsevier Science B.V.",
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Morphology control of asymmetric membranes by UV irradiation on polyimide dope solution. / Kang, Jong Suk; Won, Jongok; Park, Hyun Chae; Kim, Un Young; Kang, Yong Soo; Lee, Young Moo.

In: Journal of Membrane Science, Vol. 169, No. 2, 01.05.2000, p. 229-235.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Morphology control of asymmetric membranes by UV irradiation on polyimide dope solution

AU - Kang, Jong Suk

AU - Won, Jongok

AU - Park, Hyun Chae

AU - Kim, Un Young

AU - Kang, Yong Soo

AU - Lee, Young Moo

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AB - The membrane morphology was readily controlled by the gelation of dope solution before immersion into a coagulation medium. In particular, macrovoid-free, sponge-like integrally skinned asymmetric polyimide membranes with improved selectivity were obtained by the chemical gelation of cast solution film. Cross-linking was performed by ultraviolet irradiation for benzophenone containing polyimide dope solution. Cross-linking maintained the structure of cast solution film until the moment of immersion into a nonsolvent bath. Macrovoid decreases with irradiation time on the cast solution film. Sponge-like integrally skinned asymmetric membranes were obtained with sufficient irradiation. Gas permselectivity increased significantly with the progress of cross-linking on the cast solution film. Membrane morphology and subsequent transport properties can be controlled both by the extent of cross-linking and by the concentration of dope solution. (C) 2000 Elsevier Science B.V.

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