摘要
以1-甲基咪唑(N-MI)为季铵化试剂一步法对聚氯乙烯(PVC)功能化改性,并制备了均相PVC阴离子交换膜,避免了传统阴离子交换膜制备过程中的氯甲基化步骤。通过对比研究,优化后的PVC-N-MI-5表现出较好的综合性能。离子交换容量和迁移数分别高达2.89 mmol·g^(–1)和98.4%;吸水率和溶胀率分别为4.24%和0.21%,低于商业JAM-5阴离子交换膜(4.87%和3.33%);脱盐率、电流效率以及能耗分别为98.38%、55.8%和5.1 kW·h·(kg NaCl)^(–1),可与商业JAM-5(93.0%、55.2%和4.6 kW·h·(kg NaCl)^(–1))相比较。低廉的原料与简便的制备过程以及相对良好的电渗析应用性能,表明所制备的PVC-N-MI-5具有一定的应用前景。
This work presents the preparation of homogeneous anion exchange membrane(AEM)based on quaternized polyvinyl chloride(PVC)via straight forward quaternization of PVC with 1-methylimidazole(N-MI).In particular,the preparation avoids the use of toxic chloromethylation.The optimized AEM PVC-N-MI-5 shows ionexchange capacity(IEC)and transport number of 2.89 mmol·g^–1 and 98.4%,respectively.The water uptake and swelling ratio are 4.24%and 0.21%,lower than the commercial AEM JAM-5(4.87%and 3.33%).The NaCl removal ratio,current efficiency and energy consumption of the as-prepared AEM were 98.38%、55.8%and 5.1 kW·h·(kg NaCl)^-1,respectively,comparable to commerical JAM-5(93.0%,55.2%and 4.6 kW·h·(kgNaCl)^-1).The cost-effective PVC and relatively good performance are suggestive of the potential electrodialysis application.
作者
王超
潘能修
鲁丹
廖俊斌
沈江南
高从堦
WANG Chao;PAN Nengxiu;LU Dan;LIAO Junbin;SHEN Jiangnan;GAO Congjie(Ocean College,Zhejiang University of Technology,Hangzhou 310014,Zhejiang,China;Centre of Membrane Science and Water Technology,Zhejiang University of Technology,Hangzhou 310014,Zhejiang,China)
出处
《化工学报》
EI
CAS
CSCD
北大核心
2019年第4期1620-1627,共8页
CIESC Journal
基金
国家自然科学基金项目(21676249
21878273)
关键词
聚氯乙烯
1-甲基咪唑
均相阴离子交换膜膜
电渗析
polyvinyl chloride
1-methylimidazole
homogeneous anion exchange membrane
electrodialysis
