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以双(4-氯苯基)砜和2,2-双(4-羟基苯基)六氟丙烷为单体通过缩聚反应、氯甲基化、季铵化和碱化,制备了不同季铵化的含氟聚醚砜阴离子交换膜。利用核磁共振氢谱(~1H-NMR)对聚醚砜(PES)、氯甲基化聚醚砜(CMPES)和季铵化聚醚砜(QPES)的结构进行了表征,并测试了膜的各项性能。结果表明,膜的离子交换容量(IEC)受氯甲基化反应条件的影响,最佳条件下制得QPES-A5膜性能最佳,IEC为1.739 meq·g~(-1),80℃下吸水率(WU)可达45.4%,溶胀率(SR)为20.6%,电导率为26.10 mS·cm~(-1),常温下拉伸强度为24 MPa。60℃时用3 mol/L NaOH溶液浸泡24 h后,电导率仍为21.90 mS·cm~(-1),良好的综合性能说明含氟聚醚砜阴离子交换膜在碱性阴离子交换膜燃料电池方面有很好的应用前景
Different quaternary ammonium compounds were prepared by polycondensation, chloromethylation, quaternization and alkalization using bis (4-chlorophenyl) sulfone and 2,2-bis (4-hydroxyphenyl) hexafluoropropane as monomers Fluorinated polyethersulfone anion exchange membrane. The structures of polyethersulfone (PES), chloromethylated polyethersulfone (CMPES) and quaternized polyethersulfone (QPES) were characterized by 1H nuclear magnetic resonance (1H-NMR) Various performance. The results showed that the ion exchange capacity (IEC) of the membrane was affected by the chloromethylation reaction conditions. The best performance of QPES-A5 membrane was obtained at IEC of 1.739 meq · g -1, The water absorption (WU) was 45.4%, the swelling rate (SR) was 20.6%, the conductivity was 26.10 mS · cm -1, and the tensile strength was 24 MPa at room temperature. The conductivity was still 21.90 mS · cm ~ (-1) after being soaked in 3 mol / L NaOH solution at 60 ℃ for 24 h. A good overall performance indicates that the fluorine-containing polyethersulfone anion exchange membrane has good conductivity in alkaline anion exchange membrane fuel cell There are good prospects for the application