期刊
MACROMOLECULAR MATERIALS AND ENGINEERING
卷 302, 期 7, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mame.201600468
关键词
composites; ion exchangers; membranes; polybenzimidazole; pre-oxidized acrylic fiber
资金
- National Natural Science Foundation of China [21276148, 21076119]
- State Key Laboratory of Chemical Engineering (Tianjin University) [SKL-ChE-14B01]
Pre-oxidized acrylic fiber (POAF) and ferric sulfophenyl phosphate (FeSPP) are incorporated into polybenzimidazole (PBI) membrane for the first time to prepare high-temperature proton exchange membranes (PEMs). The strong hydrogen bonds formed between PBI/POAF and FeSPP lead to good dispersion of POAF and FeSPP, facilitate the construction of proton channels, and enhance the dimensional and mechanical stability of the membranes. PBI/FeSPP (30 wt%) shows good proton conductivity (5.43 x 10(-2) and 4.13 x 10(-2) S cm(-1) at 180 degrees C at 50% and 0 relative humidity (RH), respectively) and improved dimensional and mechanical stability compared with pristine PBI. By incorporating 5 wt% POAF into PBI/FeSPP (30 wt%), the swelling ratios are halved and the mechanical strength is enhanced by almost 30% while the proton conductivity is slightly affected (3.84 x 10(-2) and 2.97 x 10(-2) S cm(-1) at 180 degrees C at 50% and 0 RH for PBI/FeSPP (30 wt%)/POAF (5 wt%), respectively). This work offers a new route in the preparation of high-temperature PEMs with enhanced properties.
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