Linear sulfonated polyimides containing polyhedral oligomeric silsesquioxane (POSS) in main chain for proton exchange membranes
作者： Zhongying Wu , Shujiang Zhang , Hui Li , Yu Liang , Zhigang Qi
DOI: 10.1016/J.JPOWSOUR.2015.04.174
关键词:
摘要: Linear sulfonated polyimides (SPI's) incorporating a difunctional POSS unit, namely Phenyl8bisaniline-POSS, in the backbone of main chain at concentration levels 3, 5 and 10 mol% yield proton exchange membranes. Compared with other hybrid membranes fabricated by direct blending or cross-linking methods, ultrafine aggregates show more uniform distribution obtained SPI-POSS co-polymers exhibit dramatically enhanced comprehensive properties as The results reveal that SPI facilitates dispersion nano-filler increases confined bound water molecules within formation continuous transformation channels, thereby increasing conductivity comparison plain without POSS. For example, POSS-SPI higher to free (0.114 0.132 S cm-1vs. 0.0998 cm-1) 80 °C. Moreover, also process oxidative hydrolytic stabilities, low swelling ratio combined high uptake, adequate thermal stability mechanical properties, well methanol permeability. © 2015 Elsevier B.V. All rights reserved.
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