Quaternized polyepichlorohydrin/PTFE composite anion exchange membranes for direct methanol alkaline fuel cells
Quaternized polyepichlorohydrin/PTFE composite anion exchange membranes for direct methanol alkaline fuel cells
复制标题
直接甲醇碱性燃料电池用季铵化聚环氧氯丙烷/PTFE复合阴离子交换膜
DOI：
10.1016/j.memsci.2011.01.043
复制
发表时间：
2011-04-01
影响因子：
9.5
通讯作者：
Broadwell, Ian
中科院分区：
文献类型：
--
作者：
Guo, Tian Yi;Zeng, Qing Hua;Broadwell, Ian
以聚环氧氯丙烷（PECH）为原料制备了新型复合阴离子交换膜。以N，N，N '，N'-四甲基-1，6-己二胺（TMHDA）对聚环氧乙烷（PECH）进行季铵化，然后与聚四氟乙烯（PTFE）多孔膜复合，制备了季铵化聚环氧乙烷（QPECH）/PTFE复合阴离子交换膜。通过扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）对膜进行表征。X射线衍射（XRD）和热重分析（TGA）。测量了它们在直接甲醇碱性燃料电池中的吸水率、离子交换容量、离子电导率和甲醇渗透率。SEM结果表明，QPECH已渗透到PTFE膜的孔隙中。该膜表现出高的离子交换容量和离子电导率。在30-80 ℃的温度范围内，离子电导率在3.60-6.23 × 10（2）S cm（-1）的范围内。所述膜在空气气氛下具有良好的热稳定性，并且在30 ° C下在KOH浓度高达8 M的碱性介质中稳定。(C)2011 Elsevier B. V.保留所有权利。
Novel composite anion exchange membranes have been prepared using polyepichlorohydrin (PECH) to avoid chloromethylation. PECH is first quaternized with N, N, N', N'- tetramethyl-1,6-hexane diamine (TMHDA) and then combined with porous polytetrafluoroethylene (PTFE) membranes to form composite anion exchange membranes of quaternized PECH(QPECH)/PTFE. The membranes are characterized via scanning electron microscopy (SEM), Fourier transform infrared (FTIR). X-ray diffraction (XRD) and thermogravimetric analysis (TGA). Water uptake, ionic exchange capacity, ionic conductivity and methanol permeability are measured to evaluate their performance in a direct methanol alkaline fuel cell. SEM results indicate that QPECH has penetrated into the pores of the PTFE membranes. The membranes exhibit high ionic exchange capacity and ionic conductivity. The ionic conductivity is in the range 3.60-6.23 x 10(2) S cm(-1) at the temperature range 30-80 degrees C. The membranes have good thermal stability under an air atmosphere and are stable in basic media with KOH concentration up to 8 M at 30 degrees C. (C) 2011 Elsevier B.V. All rights reserved.