Radiation grafting of styrene and maleic anhydride onto PTFE membranes and sequent sulfonation for applications of vanadium redox battery
Using γ-radiation technique, poly(tetrafluoroethylene) (PTFE) membrane was grafted with styrene (St) (PTFE- graft-PS) or binary monomers of St and maleic anhydride (MAn) (PTFE- graft-PS- co-PMAn), respectively. Then grafted membranes were further sulfonated with chlorosulfonic acid into ion-exchange...
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Published in | Radiation physics and chemistry (Oxford, England : 1993) Vol. 76; no. 11; pp. 1703 - 1707 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
01.11.2007
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Subjects | |
Online Access | Get full text |
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Summary: | Using
γ-radiation technique, poly(tetrafluoroethylene) (PTFE) membrane was grafted with styrene (St) (PTFE-
graft-PS) or binary monomers of St and maleic anhydride (MAn) (PTFE-
graft-PS-
co-PMAn), respectively. Then grafted membranes were further sulfonated with chlorosulfonic acid into ion-exchange membranes (denoted as PTFE-
graft-PSSA and PTFE-
graft-PSSA-
co-PMAc, respectively) for application of vanadium redox battery (VRB). Micro-FTIR analysis indicated that PTFE was successfully grafted and sulfonated at the above two different conditions. However, a higher degree of grafting (DOG) was obtained in St/MAn binary system at the same dose due to a synergistic effect. Comparing with PTFE-
graft-PSSA, PTFE-
graft-PSSA-
co-PMAc membrane showed higher water uptake and ion-exchange capacity (IEC) and lower area resistance (AR) at the same DOG. In addition, PTFE-
graft-PSSA-
co-PMAc with 6% DOG also showed a higher IEC and higher conductivity compared to Nafion membrane. Radiation grafting of PTFE in St/MAn binary system and sequent sulfonation is an appropriate method for preparing ion-exchange membrane of VRB. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 SourceType-Scholarly Journals-2 ObjectType-Feature-2 ObjectType-Conference Paper-1 SourceType-Conference Papers & Proceedings-1 ObjectType-Article-3 |
ISSN: | 0969-806X 1879-0895 |
DOI: | 10.1016/j.radphyschem.2007.01.012 |