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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2207
Title: Analysis of partially sulfonated low density polyethylene (LDPE) membranes as separators in microbial fuel cells
Authors: Kumar V.
Rudra R.
Nandy A.
Hait S.
Kundu, Patit Paban
Published in: RSC Advances
Abstract: In the present study, sulfonated low density polyethylenes (LDPEs) in varied molar ratios have been analyzed as separating barriers in microbial fuel cells (MFCs) for bioelectricity production. LDPE sulfonation was performed with chlorosulfonic acid for 7, 15, 30, 45 and 60 minutes which revealed respective degree of sulfonation (DS) results of 9%, 12%, 15%, 10% and 7% in SPE-7, SPE-15, SPE-30, SPE-45 and SPE-60 membranes. Prolonged sulfonation (above 30 minutes) has shown additional sulfone crosslinking formation within the membrane structure, thereby reducing the respective DS in the SPE-45 and SPE-60 membranes. Enhanced membrane properties in terms of water uptake, ion-exchange capacity (IEC) and proton conductivity have been observed with an increasing DS as a result of the incorporated sulfonic acid in the membranes. In succession, respective IEC values of 0.0056, 0.015, 0.048, 0.0087 and 0.0012 meq g-1 and proton conductivities of 2.67 × 10-7, 3.12 × 10-6, 4.74 × 10-5, 2.76 × 10-7 and 2.13 × 10-8 S cm-1 have been observed with the SPE-7, SPE-15, SPE-30, SPE-45 and SPE-60 membranes, where reduced membrane properties in the SPE-45 and SPE-60 membranes were observed with additional sulfone crosslinks being formed in the structure. The casted membranes were assembled as a membrane electrode assembly (MEA) in single chambered MFCs, where a maximum power and current density of 85.73 ± 5 mW m-2 and 355.07 ± 18 mA m-2 were observed with the SPE-30(DS 15%) membrane with an overall ?88.67% chemical oxygen demand (COD) removal in a 30 day run. The employed electrogenic firmicutes showed marked reductions in the overall systemic resistance, depicting the relevance of sulfonated LDPE membranes in MFCs as potent separators for bio-energy conversion. © 2017 The Royal Society of Chemistry.
Citation: RSC Advances (2017), 7(35): 21890-21900
URI: https://doi.org/10.1039/c7ra02317k
http://repository.iitr.ac.in/handle/123456789/2207
Issue Date: 2017
Publisher: Royal Society of Chemistry
ISSN: 20462069
Author Scopus IDs: 57197697614
56890897200
55813019000
26635350000
35475516300
Author Affiliations: Kumar, V., Department of Civil and Environmental Engineering, Indian Institute of Technology, Patna Bihar, India
Rudra, R., Advanced Polymer Laboratory, Department of Polymer Science and Technology, University of Calcutta, India
Nandy, A., Advanced Polymer Laboratory, Department of Polymer Science and Technology, University of Calcutta, India
Hait, S., Department of Civil and Environmental Engineering, Indian Institute of Technology, Patna Bihar, India
Kundu, P.P., Advanced Polymer Laboratory, Department of Polymer Science and Technology, University of Calcutta, India
Corresponding Author: Hait, S.; Department of Civil and Environmental Engineering, Indian Institute of TechnologyIndia; email: shait@iitp.ac.in
Appears in Collections:Journal Publications [CH]

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