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- Title
Strengthening Phosphoric Acid Doped Polybenzimidazole Membranes with Siloxane Networks for Using as High Temperature Proton Exchange Membranes.
- Authors
Yang, Jingshuai; Gao, Liping; Wang, Jin; Xu, Yixin; Liu, Chao; He, Ronghuan
- Abstract
Two silane compounds, i.e., ((chloromethyl)phenylethyl)trimethoxysilane (Ph-Si) and 3-chloropropyltriethoxysilane (Pr-Si), are employed as covalent crosslinkers to fabricate high temperature proton exchange membranes based on polybenzimidazole (PBI) in order to better understand the correlation between the structure and the property of the crosslinked membranes. All the crosslinked PBI membranes display longer morphology durability over the neat PBI membrane toward the radical oxidation. The crosslinked membranes with the crosslinker containing a rigid group of phenylene (PBI-Ph) show superior acid doping level, high conductivity, and excellent mechanical strength simultaneously, comparing to those with the crosslinker having a flexible alkyl chain (PBI-Pr) and the pristine PBI based membrane. The technical feasibility for using as high temperature proton exchange membranes is demonstrated by the acid doped crosslinked PBI-Ph membranes via fuel cell tests.
- Subjects
PHOSPHORIC acid; SILOXANES; CROSSLINKING (Polymerization); ARTIFICIAL membranes; HIGH temperatures; OXIDATION
- Publication
Macromolecular Chemistry & Physics, 2017, Vol 218, Issue 10, pn/a
- ISSN
1022-1352
- Publication type
Article
- DOI
10.1002/macp.201700009