http://repository.iitr.ac.in/handle/123456789/2267| Title: | Low methanol permeable and highly selective membranes composed of pure and/or partially sulfonated PVdF-co-HFP and polyaniline |
| Authors: | Dutta K. Das S. Kundu, Patit Paban |
| Published in: | Journal of Membrane Science |
| Abstract: | Blend membranes fabricated from partially sulfonated poly(vinylidene fluoride-. co-hexafluoro propylene) and partially sulfonated polyaniline (SPVdF-. co-HFP/SPAni) have shown inspiring results in terms of methanol permeability, membrane selectivity and ion-exchange capacity toward their targeted application as a low cost polymeric membrane in direct methanol fuel cell. It is widely known that compared to conventional blending, layered membrane coating results in superior membrane properties. Therefore, in this work, we demonstrate fabrication of tri-layered sandwich PAni/PVdF-. co-HFP/PAni, PAni/SPVdF-. co-HFP/PAni and SPAni/SPVdF-. co-HFP/SPAni membranes and the resulting enhancements of transport properties of these coated membranes in comparison to that of pristine PVdF-. co-HFP, pristine SPVdF-. co-HFP, pristine Nafion, PVdF-. co-HFP/PAni blend, SPVdF-. co-HFP/PAni blend and SPVdF-. co-HFP/SPAni blend membranes. The tri-layered coated sandwich membranes exhibited higher proton conductivities, ion-exchange capacities, membrane selectivities and open-circuit potentials, and lower methanol permeabilities at all methanol concentrations, compared to their blend counterparts. In addition, the coated membranes exhibited superiority over pristine Nafion in terms of methanol permeability and membrane selectivity at high methanol concentrations. Furthermore, the DMFC performance obtained with the SPAni/SPVdF-. co-HFP/SPAni tri-layered coated membrane was found to be superior to that of pristine Nafion, pristine SPVdF-. co-HFP and SPVdF-. co-HFP/SPAni blend membranes at high methanol feed concentration (i.e. 6. M). © 2014 Elsevier B.V. |
| Citation: | Journal of Membrane Science (2014), 468(): 42-51 |
| URI: | https://doi.org/10.1016/j.memsci.2014.05.049 http://repository.iitr.ac.in/handle/123456789/2267 |
| Issue Date: | 2014 |
| Publisher: | Elsevier |
| Keywords: | Coated tri-layered sandwich membrane DMFC performance Membrane selectivity Sulfonated poly(vinylidene fluoride-co-hexafluoro propylene) Sulfonated polyaniline |
| ISSN: | 3767388 |
| Author Scopus IDs: | 7005115695 55820818900 35475516300 |
| Author Affiliations: | Dutta, K., Advanced Polymer Laboratory, Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata 700 009, India Das, S., Advanced Polymer Laboratory, Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata 700 009, India Kundu, P.P., Advanced Polymer Laboratory, Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata 700 009, India |
| Funding Details: | KD would like to thank the Council of Scientific and Industrial Research (CSIR), India, for a Senior Research Fellowship. PPK is thankful to the Ministry of New and Renewable Energy (MNRE), Govt. of India, for a grant-in-aid (Grant no. 102/56/2009-NT ). The authors would also like to thank Mr. Sujoy Debnath (University of Calcutta) for carrying out the tensile testing of the membranes. |
| Corresponding Author: | Kundu, P.P.; Advanced Polymer Laboratory, Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata 700 009, India; email: ppk923@yahoo.com |
| Appears in Collections: | Journal Publications [CH] |
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