Enhanced Proton Conductivity in Sulfonated Poly(ether ether ketone) Membranes by Incorporating Sodium Dodecyl Benzene Sulfonate
Enhanced Proton Conductivity in Sulfonated Poly(ether ether ketone) Membranes by Incorporating Sodium Dodecyl Benzene Sulfonate
复制标题
通过掺入十二烷基苯磺酸钠增强磺化聚醚醚酮膜中的质子电导率
作者：
Zhai Shaoxiong;Dai Wenxu;Lin Jun;He Shaojian;Zhang Bing;Chen Lin
因此，如何提高质子交换膜的质子传导率具有重要的意义。本文采用溶液浇铸法将表面活性剂十二烷基苯磺酸钠（SDBS）引入磺化聚醚醚酮（SPEEK）中，制备了SPEEK/SDBS膜。当SDBS的加入量不超过10wt%时，SDBS能很好地溶解在SPEEK基体中，SPEEK/SDBS膜中质子转移的活化能大大降低，从而显著提高了膜的质子电导率。与SPEEK对照膜相比，具有10wt%SDBS的SPEEK/SDBS膜显示出质子传导率增加了78%，从0.051 S cm-1增加到0.091 S cm-1，而吸水率从38%增加到62%。此外，SPEEK/SDBS膜具有恒定的质子电导率下，长期水浸测试。
It is of great importance to improve the proton conductivity of proton exchange membranes by easy-handling and cost-efficient approaches. In this work, we incorporated a commercially obtained surfactant, sodium dodecyl benzene sulfonate (SDBS), into sulfonated poly(ether ether ketone) (SPEEK) through solution casting to prepare SPEEK/SDBS membranes. When no more than 10 wt % SDBS was added, the SDBS was well dissolved into the SPEEK matrix, and the activation energy for the proton transfer in the SPEEK/SDBS membranes was greatly reduced, leading to significant enhancement of the membrane proton conductivity. Compared with the SPEEK control membrane, the SPEEK/SDBS membrane with 10 wt % SDBS showed a 78% increase in proton conductivity, up from 0.051 S cm−1 to 0.091 S cm−1, while the water uptake increased from 38% to 62%. Moreover, the SPEEK/SDBS membrane exhibited constant proton conductivity under a long-term water immersion test.