CuCl催化原子转移自由基活性聚合反应合成碳氟骨架均相阳离子交换膜  

Synthesis of Carbon Fluorine Skeleton Homogeneous Cation Exchange Membrane by CuCl Catalyzed Atom-Transfer Radical Reactive Polymerization Reaction

作　　者：王国栋[1] 李钲 陈日耀[1] 黄雪红[2] 杨宇 陈晓[1] 金延超 Guodong Wang;Zheng Li;Riyao Chen;Xuehong Huang;Yu Yang;Xiao Chen;Yanchao Jin(College of Environmental and Resource Sciences,College of Carbon Neutral Modern Industry,Fujian Normal University,Fuzhou 350117,China;College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350117,China;Fujian Hongmiaoling Haixia Environmental Protection Co.,Ltd.,Fuzhou 350014,China)

机构地区：[1]福建师范大学环境与资源学院碳中和现代产业学院,福建福州350117 [2]福建师范大学化学与材料学院,福建福州350117 [3]福建省红庙岭海峡环保有限公司,福建福州350014

出　　处：《高分子材料科学与工程》2024年第12期1-9,共9页Polymer Materials Science & Engineering

基　　金：福建省科技厅引导性项目(2021Y0009,2024Y0005)。

摘　　要：文中利用原子转移自由基活性聚合反应(ATRP)将苯乙烯磺酸钠(PSSA)均匀接枝在聚三氟氯乙烯-偏氟乙烯共聚物P(VDF-co-CTFE)上,制备了一种碳氟骨架的均相阳离子交换膜——P(VDF-co-CTFE)-g-PSSA膜。采用傅里叶变换红外光谱、X射线能谱分析、X射线衍射、扫描电镜、热重分析、接触角测量等手段对在不同反应温度、反应时间、催化剂与配体摩尔质量比条件下制备的P(VDF-co-CTFE)-g-PSSA进行表征。结果表明,苯乙烯磺酸钠成功接枝在碳氟主链结构上,所制备的阳离子交换膜具有良好的热稳定性和力学性能。扫描电镜显示阳离子膜表面的相分离形态;在130℃反应7 h制得的阳离子膜的吸水率为80.02%,膨胀率为8.89%,离子交换容量达4.54 mmol/g,电导率为0.50 mS/cm。文中制备的阳离子交换膜在高盐废水处理方面具有应用前景。In this study,a homogeneous cation exchange membrane with fluorocarbon backbone,i.e.,P(VDF co-CTFE)-g-PSSA membrane,was prepared by uniformly grafting sodium styrenesulfonate(PSSA)onto poly(vinylidene trifluoride co-fluoroethylene)copolymer P(VDF co-CTFE)by atom-transfer radical reactive polymerization(ATRP)reaction.Fourier-transform infrared spectroscopy(FT-IR),X-ray energy spectroscopy(EDS),X-ray diffraction(XRD),scanning electron microscopy(SEM),thermogravimetric analysis(TGA),and contact angle measurements were used to characterize the P(VDF-co-CTFE)-g-PSSA prepared at different reaction temperatures,reaction time,and catalyst-to-ligand molar mass ratios.The results show that styrenesulfonic acid groups were successfully grafted on the fluorocarbon backbone structure,and the prepared cation exchange membrane has good thermal stability and mechanical properties.The scanning electron microscopy images show the phase separation morphology on the surface of the cation membrane;the cation membrane prepared by reacting at 130℃for 7 h has a water absorption of 80.02%,a swelling rate of 8.89%,an ion-exchange capacity of 4.54 mmol/g,and an electrical conductivity of 0.50 mS/cm.The cation exchange membrane prepared in this study has application value in high salt wastewater treatment.

关 键 词：聚(偏氟乙烯-三氟氯乙烯) 均相 阳离子交换膜 原子转移自由基活性聚合反应 

分 类 号：TQ425.236[化学工程]