Sulfonated poly(ether ether ketone)/polybenzimidazole oligomer/epoxy resin composite membranes in situ polymerization for direct methanol fuel cell usages |
| |
Authors: | Miaomiao HanGang Zhang Mingyu LiShuang Wang Zhongguo LiuHongtao Li Yang ZhangDan Xu Jing WangJing Ni Hui Na |
| |
Affiliation: | Alan G. MacDiarmid Institute, College of Chemistry, Jilin University, Qianjin Street 2699#, Changchun 130012, PR China |
| |
Abstract: | A diamine-terminated polybenzimidazole oligomer (o-PBI) has been synthesized for introducing the benzimidazole groups (BI) into sulfonated poly(ether ether ketone) (SPEEK) membranes. SPEEK/o-PBI/4,4′-diglycidyl(3,3′,5,5′-tetramethylbiphenyl) epoxy resin (TMBP) composite membranes in situ polymerization has been prepared for the purpose of improving the performance of SPEEK with high ion-exchange capacities (IEC) for the usage in the direct methanol fuel cells (DMFCs). The composite membranes with three-dimensional network structure are obtained through a cross-linking reaction between PBI oligomer and TMBP and the acid-base interaction between sulfonic acid groups and benzimidazole groups. Resulting membranes show a significantly increasing of all of the properties, such as high proton conductivity (0.14 S cm−1 at 80 °C), low methanol permeability (2.38 × 10−8 cm2 s−1), low water uptake (25.66% at 80 °C) and swelling ratio (4.11% at 80 °C), strong thermal and oxidative stability, and mechanical properties. Higher selectivity has been found for the composite membranes in comparison with SPEEK. Therefore, the SPEEK/o-PBI/TMBP composite membranes show a good potential in DMFCs usages. |
| |
Keywords: | Proton exchange membrane Sulfonated poly(ether ether ketone) Polybenzimidazole oligomer Composite membranes |
本文献已被 ScienceDirect 等数据库收录! |
|