聚醚砜/聚磺酰胺管式纳滤复合膜的制备条件优化及耐氯性能研究  

Optimization of preparation conditions for polyethersulfone/polysulfonamide tubular nanofiltration composite membrane and study on membrane's chlorine resistance

作　　者：刘恩华[1] 刘杉 魏飞 LIU En-hua;LIU Shan;WEI Fei(State Key Laboratory of Hollow Fiber Membrane Materials and Membrane Process,Tiangong University,Tianjin 300387,China;Tianjin Hipure Membrane Technology Co.,Ltd.,Tianjin 300304,China)

机构地区：[1]天津工业大学,中空纤维膜材料与膜过程省部共建国家重点实验室,天津300387 [2]天津海普尔膜科技有限公司,天津300304

出　　处：《现代化工》2025年第2期176-181,187,共7页Modern Chemical Industry

基　　金：天津市科技计划项目(16PTGCCX00070)。

摘　　要：为了获得具有优异脱盐性和高耐氯性的管式纳滤复合膜,以PET无纺布和HOP(PP+PE)无纺布为支撑层的聚醚砜超滤膜为基膜,通过界面聚合技术制备聚醚砜/聚磺酰胺管式纳滤复合膜(PES/PSA);研究了水相和有机相各组分浓度对于PES/PSA复合膜脱盐性能的影响以及在不同次氯酸钠(NaClO)浓度和时间下PES/PSA复合膜的耐氯性能。通过FT-IR、SEM对PES/PSA复合膜的物理、化学结构进行了表征,结果表明,当水相中哌嗪(PIP)质量分数为0.8%、4-二甲氨基吡啶(DMAP)质量分数为0.015%、十二烷基硫酸钠(SDS)质量分数为0.01%及有机相中均苯三磺酰氯(TSC)质量分数为0.05%、丙酮质量分数为3%时,制备的PES/PSA复合膜具有长期稳定的高脱盐性能;PES/PSA复合膜在pH=5.0、1000 mg/L活性氯处理24 h以及pH=5.0、不同质量浓度活性氯处理2 h的条件下,脱盐性能依然保持稳定,具有优异的耐氯性。In order to obtain a tubular nanofiltration composite membrane with excellent desalination performance and high chlorine resistance,a polyethersulfone ultrafiltration membrane supported by PET non-woven fabrics and HOP(PP+PE)non-woven fabrics is taken as the base membrane to make a polyethersulfone/polysulfonamide(PES/PSA)tubular nanofiltration membrane through interface polymerization technology.The influences of the concentrations of every component in aqueous and organic phases on the desalination performance of PES/PSA composite membrane are studied,and the chlorine resistance of PES/PSA composite membrane is evaluated under different sodium hypochlorite(NaClO)concentrations and time changes.The physical and chemical structure of PES/PSA composite membrane are characterized by means of FT-IR and SEM.The obtained results indicate that PES/PSA composite membrane with long-term stable high desalination performance can be prepared under the conditions that the mass fractions of piperazine,4-dimethylaminopyridine and sodium dodecyl sulfate in aqueous phase are 0.8 wt%,0.015 wt%,and 0.01 wt%,respectively and the mass fractions of triphenylsulfonyl chloride and acetone in organic phase are 0.05 wt%and 3 wt%,respectively.PES/PSA composite membrane remains stable desalination performance when it has worked for 24 h under a pH of 5.0 and 1000 mg·L^(-1) of active chlorine,or when it has operated for 2 h under a pH of 5.0 and different mass concentrations of active chlorine,presenting an excellent chlorine resistance.

关 键 词：聚醚砜 聚磺酰胺 管式纳滤 耐氯性 脱盐 

分 类 号：TQ028.8[化学工程]