Anhydrous Proton-Conducting Electrolyte Based on a Nematic Poly(methyl acrylate) Containing Sulfonated Side Chains

作者：Liang Ting; Wu Yong^*; Tan Shuai; Wang Caihong

来源：Journal of Applied Polymer Science, 2014, 131(12): n/a-n/a.

DOI：10.1002/app.40382

• liquid crystals
• electrochemistry
• conducting polymers

A nematic poly(methyl acrylate) containing terminal sulfonic acids in side chains was prepared by etherification of a brominated mesomorphic precursor with 2-hydroxyethanesulfonic acid sodium salt. Differential scanning calorimetry measurements and polarized light microscopy observation revealed that the sulfonated polymer exhibited the nematic mesophase at medium temperatures (189-227 degrees C). Electrochemical impedance spectroscopy measurements showed that temperature dependence of anhydrous proton conductivity for the nematic polymer followed the Arrhenius law and that the estimated activation energy was 95 kJ mol(-1) in the nematic phase. The proton conductivities of the nematic polymer were two orders of magnitude higher than those of anhydrous Nafion (R) 117 membrane at the same temperature. The enhanced anhydrous proton conductivities of the polymeric electrolyte were ascribed to the orientational order and fluidity of the nematic liquid crystal.

• 出版日期2014-6-15
• 单位四川大学