Novel sulfonated poly(ether ether ketone)/polybenzimidazole blends for proton exchange membranes

作者：Feng Pengju; Liu Zhuang; Liu Siyuan; Li Xiaobai; Hu Wei; Jiang Zhenhua; Liu Baijun^*

来源：High Performance Polymers, 2013, 25(6): 697-704.

DOI：10.1177/0954008313482956

• sulfonated poly(ether ether ketone)
• polybenzimidazole
• proton exchange membrane
• acid-base interaction

A novel soluble polybenzimidazole with a pendant phenyl group (Ph-PBI) was successfully synthesized based on 4,4-(1,4-phenylenedioxy-2-phenyl) dibenzoic acid and diaminobenzidine. A phenylated sulfonated poly(ether ether ketone) (Ph-SPEEK) with a similar chemical structure to Ph-PBI was selected as matrix. Ph-SPEEK/Ph-PBI membranes were produced by a solution method. The obtained blend membranes exhibited much higher thermal stability as well as oxidative stability and lower water uptake than the pristine Ph-SPEEK membrane. The proton conductivity of the blend membranes could be in the range of 0.0374-0.1456Scm(-1) at 100 degrees C. As a result, the blend membranes also showed improved mechanical properties that may be related with the acid-base interactions between the two components.

• 出版日期2013-9
• 单位吉林大学; 长春工业大学