CAJ | 학술논문

在聚氯乙烯(PVC)超滤膜表面通过沉积形成与之共价结合的聚乙烯亚胺(PEI)层,先后用戊二醛和2,3-环氧丙基三甲基氯化铵(EPTAC)令 PEI 交联和季铵化,制备了荷正电 PVC/PEI 复合纳滤膜；考察PEI分子量和 EPTAC 浓度对膜结构及性能的影响.结果表明,当分子量分别为5万和7万的两种 PEI 按质量比1∶1混合使用时,可以得到皮层致密均一的复合膜,EPTAC 季铵化后 PVC/PEI 复合纳滤膜荷正电,有良好的亲水性,0．3 MP a 操作压力下水通量达58．7 L/m2·h,对 NaCl 不截留,对刚果红染料的截留率达98．9％,在染料和无机盐分离领域具有重要意义.
재취록을희(PVC)초려막표면통과침적형성여지공개결합적취을희아알(PEI)층,선후용무이철화2,3-배양병기삼갑기록화안(EPTAC)령 PEI 교련화계안화,제비료하정전 PVC/PEI 복합납려막；고찰PEI분자량화 EPTAC 농도대막결구급성능적영향.결과표명,당분자량분별위5만화7만적량충 PEI 안질량비1∶1혼합사용시,가이득도피층치밀균일적복합막,EPTAC 계안화후 PVC/PEI 복합납려막하정전,유량호적친수성,0．3 MP a 조작압력하수통량체58．7 L/m2·h,대 NaCl 불절류,대강과홍염료적절류솔체98．9％,재염료화무궤염분리영역구유중요의의.
By filtering deposition of polyethylene imine (PEI)and then crosslinking by glutaraldehyde,a dense separation layer was introduced onto the surface of PVC ultrafiltration membrane.On this basis,positively charged PVC/PEI composite NF membrane was prepared after the reaction between the remaining amino groups and 2,3-epoxy-trimethyl ammonium chloride(EPTAC).It was found that we would achieve PVC nanofiltration membrane with the best performance using mixture of PEI-7w and PEI-2w (1∶1 ).The PVC/PEI composite NF membrane showed good hydrophilicity and great nanofiltration performance.Under the operating pressure of 0.3 MPa,the Congo red rejection and flux is 98.9% and 58.7 L/m2 ·h,respectively,while the NaCl rejection is almost zero.Thus,the PVC nanofiltration membrane was quite qualified for the separation of mixed inorgan-icsalt and dye solution.This approach is a promising way for fabricating PVC NF membrane with high water flux and dye rej ection.