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以氯甲基辛醚为氯甲基化试剂,对杂萘联苯聚芳醚酮酮(PPEKK)进行改性,制备了氯甲基化杂萘联苯聚芳醚酮酮(CMPPEKK).考察了氯甲基辛醚用量对氯甲基化程度的影响.1H NMR表明氯甲基成功引入到聚合物结构中.采用溶液法制备了CMPPEKK基膜,然后将其进行三甲胺胺化,制备了季铵化杂萘联苯聚芳醚酮酮(QAPPEKK)阴离子交换膜.表征了QAPPEKK的基本性能:离子交换容量,含水率,面电阻.QAPPEKK膜的含水率随离子交换容量增加而升高,面电阻随离子交换容量的增加而降低.将QAPPEKK膜应用于全钒液流电池(VRB)中,电池的能量效率达到85.0%,电流效率为98.5%,电压效率为86.3%.
Chlorinated para-polyphenyl ether ketone ketone (PPEKK) was modified with chloromethyl octyl ether as a chloromethylation reagent to prepare chlorinated para-polyphenyl ether ketone ketone (CMPPEKK). The effect of chloromethyl octyl ether on the degree of chloromethylation was investigated.1H NMR showed that chloromethyl was successfully introduced into the polymer structure.The CMPPEKK basement membrane was prepared by solution method and then aminomethylated to prepare QAPPEKK anion exchange membrane was used to characterize the basic properties of QAPPEKK: ion exchange capacity, water cut, surface resistance.The moisture content of QAPPEKK membrane increased with the increase of ion exchange capacity, The sheet resistance decreases with the increase of ion exchange capacity.The QAPPEKK film is used in all-vanadium redox flow battery (VRB) with the energy efficiency of 85.0%, the current efficiency of 98.5% and the voltage efficiency of 86.3%.