Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 389, Issue -, Pages 399-406Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2011.11.005
Keywords
Poly(benzimidazole); Butylsulfonate grafted poly(benzimidazole); PEMFC
Categories
Funding
- Bureau of Energy, Ministry of Economy Affair of Taiwan [99-D0137-4]
Ask authors/readers for more resources
In this work, we synthesize two poly(benzimidazole) (PBIs), i.e., medium molecular weight PBIm and high molecular weight PBIh with < M-w > = 9.16 x 10(4) and 1.60 x 10(5) g/mol, respectively, and two butylsulfonate grafted PBIs (PBI-BSs), i.e., PBIm-BS and PBIh-BS. In the PBIs, 22 mole% of imidazole groups of PBIm and 17 mole% of imidazole groups of PBIh are grafted with butyl sulfonate groups. The PBIh/PBIh-BS and PBIm/PBIm-BS blend membranes are prepared with various weight (wt) ratios of PBI/PBI-BS. We demonstrate that PBIh/PBIh-BS blend membranes have better mechanical properties, phosphoric acid doping level, proton conductivity, and fuel cell performance than neat PBI and PBIm/PBIm-BS blend membranes. The influences of PBI molecular weight and the Lewis acid-base interaction of PBI-BS butyl sulfonic acids with imidazole groups on the membrane properties and fuel cell performances of PBI/PBI-BS blends are discussed. (C) 2011 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available