膜科学与技术

基于羟丙基-β-环糊精的界面聚合纳滤膜及其性能研究

作者：李春¹，贾萌萌¹，张梦蕾¹，秦振平 ²，马语晨¹，梁玉仓³，郭红霞¹

单位： 1. 北京工业大学材料与制造学部；2. 北京工业大学环境与生命学部，北京 100124； 3. 德国图宾根大学无机化学研究所，图宾根，72076，德国

关键词：纳滤膜；羟丙基-β-环糊精；界面聚合；渗透通量；耐氯性能

出版年,卷(期):页码： 2021,41(6):118-125

摘要：

以羟丙基-β-环糊精(HP-β-CD)为水相单体，γ-氨丙基三乙氧基硅烷(KH-550)为添加剂，与均苯三甲酰氯(TMC)在聚砜(PSf)基膜上界面聚合，制备HP-β-CD-TMC/PSf复合纳滤膜。通过FTIR、SEM、AFM和Zeta电位等表征了膜表面的表面化学组分、形貌及荷电性，探究了不同KH-550浓度对PSf复合膜分离性能的影响，并考察了复合膜的耐氯性能。结果表明，水相中KH-550浓度为0.15 wt% 时，制备的复合纳滤膜亲水性较好，对伊文思蓝(EB)、刚果红(CR)、木质素磺酸钠(SL)的截留率均在90%以上，通量大于54.5 L/m2·h·MPa。复合膜经10.0 g/L的次氯酸钠(NaClO)浸泡200h后，其通量和截留率无明显变化，表明该复合膜具有较好的耐氯稳定性。

The composite nanofiltration membrane with good chlorine resistance was prepared by interfacial polymerization on polysulfone (PSf) substrate membrane using hydroxypropyl-β-cyclodextrin (HP-β-CD) as aqueous phase, γ-aminopropyltriethoxysilane (KH-550) as additive and triformyl chloride (TMC) as organic phase. The surface chemical composition, morphology, structure and charges of the membranes were characterized by FTIR, SEM, AFM and zeta potential. The effect of KH-550 concentration on the separation performance as well as the chlorine tolerance of membranes was explored. The results showed that the optimal HP-β-CD-TMC/PSf membrane exhibited water contact angle of 69°with water permeabity of 70.7 L/m2·h·MPa, when the concentration of KH-550 is 0.15wt%, and the rejection rate of evans blue (EB), congo red (CR) and sodium lignosulfonate (SL) is more than 90% along with flux more than 54.5 L/m2·h·MPa. In addition, the membrane displayed an excellent chlorinea resistance after soaking in 10.0g/L NaClO for 200 hours.

李春（1997-）男，天津宝坻人，硕士研究生，研究方向为聚合物膜改性及性能研究。E-mail: chunl@emails.bjut.edu.cn。

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