基于氯化聚氯乙烯/聚乙烯醇缩丁醛共混膜的界面聚合改性  

Interfacial polymerization modification of chlorinated polyvinyl chloride/polyvinyl butyral blend membrane

作　　者：范洋瑞 钱建华[1] 徐凯杨 王澳 陶正龙 FAN Yangrui;QIAN Jianhua;XU Kaiyang;WANG Ao;TAO Zhenglong(College of Textile Science and Engineering(International Institute of Silk),Zhejiang Sci-Tech University,Hangzhou,Zhejiang 310018,China)

机构地区：[1]浙江理工大学纺织科学与工程学院(国际丝绸学院),浙江杭州310018

出　　处：《纺织学报》2023年第7期33-41,共9页Journal of Textile Research

摘　　要：为提高纳滤(NF)膜的离子分离效率,以氯化聚氯乙烯/聚乙烯醇缩丁醛(CPVC/PVB)共混膜作为基膜,利用添加剂聚乙二醇(PEG)、1,2-丙二醇(PG)对基膜进行表面亲水改性。以改性后的CPVC/PVB共混膜作为支撑层,通过水相单体间苯二胺(MPD)与油相单体均苯三甲酰氯(TMC),在反应助剂N-乙基胺哌嗪丙基磺酸盐(AEPPS)的催化下发生界面聚合得到复合NF膜。研究了水相单体MPD质量分数、油相单体TMC质量分数和反应助剂AEPPS质量分数等参数对复合NF膜结构和性能的影响。结果表明:当MPD、TMC、AEPPS的质量分数分别为0.6%、0.5%和0.6%时,纳滤膜表面的三维形貌变得平整,粗糙度降低,结构更加致密,亲水性得以提高;纳滤膜表面形成了荷正电结构致密的聚酰胺分离层,对Mg^(2+)具有较好的分离效果,在水质软化、海水淡化、工业废水处理等领域具有良好的进一步开发与应用前景。Objective In order to improve the ion separation efficiency of nanofiltration(NF)membrane and improve hydrophilicity and surface smoothness of chlorinated polyvinyl chloride/polyvinyl butyral(CPVC/PVB)blend membrane,this research investigated the modification of CPVC/PVB blend membrane,and the structure and properties of nanofiltration membrane before and after modification were analyzed to broaden the application of CPVC/PVB blend membrane.Method CPVC/PVB blend membranes were used as the base membrane,and the surface of the base membranes were modified to improve hydrophilicity using the additives of polyethylene glycol(PEG)and 1,2-propanediol(PG).Using the modified CPVC/PVB blend membranes as the support layer,water phase monomer m-phenylenediamine(MPD)and the oil phase monomer trimesic acid chloride(TMC)were polymerized on the support layer interfacial,by the reaction assistant N-ethylamine piper under the catalysis of azinepropyl sulfonate(AEPPS).The Influences of mass fractions of MPD,TMC and AEEPS on the structure and performance of composite nanofiltration membranes were studied.A series of experiments were carried out using Fourier infrared spectrometer,field emission scanning electron microscope,ultraviolet and visible spectrophotometer,energy spectrum analyzer,Zeta potential tester,and water flux tester.The influences of the infrared spectrum of the blend membrane,surface elements,the cross-section structure of the surface microstructure,the Zeta potential of the membrane surface,and the monomer mass fraction required for the interfacial polymerization on the water flux and desalination performance of the nanofiltration membrane were obtained.Results After the interface polymerization of CPVC/PVB blend membrane,two characteristic peaks and amino groups were added to the infrared spectrum(Fig.3).With the increase of the mass fraction of MPD monomer,the proportion of N elements on the membrane surface first increased and then decreased(Tab.1).The increase in N element is due to the introduction of amino g

关 键 词：氯化聚氯乙烯 聚乙烯醇缩丁醛 荷正电纳滤膜 界面聚合 微观结构 过滤材料 水处理 

分 类 号：TQ051.893[化学工程]