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麦芽糖醇基聚酯复合纳滤膜的制备及性能

作者：张全合，刘大朋，洪耀良

单位：苏州科技大学环境科学与工程学院，苏州 215009;2.江苏省分离净化材料与技术工程研究中心，苏州 215009;3.江苏省水处理技术与材料协同创新中心，苏州 215009

关键词：疏松纳滤膜；界面聚合；麦芽糖醇；染料/盐分离

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2024,44(3):133-142

摘要：

疏松纳滤膜具有良好的染料/盐选择分离性，有望满足纺织废水处理中对染料/盐混合物分离的迫切需要。本文以具有丰富羟基的麦芽糖醇(Maltitol)为新型水相单体，通过与均苯三甲酰氯(TMC)在聚醚砜（PES）超滤膜表面界面聚合(IP)，制备了具有高染料/盐选择性和高透水通量的Maltitol/TMC疏松纳滤膜，用于染料/盐组分的高效分离。通过调节麦芽糖醇的浓度对膜的性能进行优化，优化后的膜纯水通量达800.1 L· m2·h/MPa，对刚果红(CR)、直接红23 (DR 23)和铬黑T (EBT)的截留率分别为99.3 %、95.1 %和97.2 %，对Na2SO4和NaCl截留率分别仅为10.3 %和4.4 %。优化膜对三种染料的通量恢复率（FRR）均在90 %左右，同时对染料/盐混合溶液具有良好的运行稳定性。这些结果表明，该新型麦芽糖醇基纳滤膜在纺织废水处理中具有良好的应用前景。

Loose nanofiltration membranes with excellent dye/salt selective separation are expected to fulfill the urgent need for dye/salt mixture separation in textile wastewater treatment. In this study, Maltitol with abundant hydroxyl groups was used as a novel aqueous monomer, and Maltitol/TMC loose nanofiltration membrane with high dye/salt selectivity and high water permeance was fabricated by interfacial polymerization (IP) with trimesoyl chloride (TMC) on the surface of Polyethersulfone (PES) ultrafiltration membranes for the excellent separation of dye/salt mixed solutions.The performance of the membranes was optimized by adjusting the concentration of Maltitol, and the optimized membranes had water permeance of 800.1 L· m2·h/MPa, with dyes rejection to 99.3 %, 95.1 % and 97.2 % for Congo red (CR), Direct red 23 (DR 23) and Eriochrome black T (EBT), the rejection of Na2SO4 and NaCl were only 10.3 % and 4.4 %, respectively. The optimized membranes showed flux recovery ratio (FRR) of around 90 % for all three dyes, and good long-term stability for the mixed salt/dye solutions. The new maltitol-based nanofiltration membrane has excellent application prospects in textile wastewater treatment.

基金项目：

国家自然科学基金（51908394）

作者简介：

张全合（1999-），河南信阳人，硕士，主要从事污水处理与回用技术。

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