麦芽糖醇基聚酯复合纳滤膜的制备及性能
Fabrication and performance of maltitol-based polyester composite nanofiltration membrane
张全合 1刘大朋 2洪耀良3
作者信息
- 1. 苏州科技大学环境科学与工程学院,苏州 215009
- 2. 苏州科技大学环境科学与工程学院,苏州 215009;江苏省分离净化材料与技术工程研究中心,苏州 215009
- 3. 苏州科技大学环境科学与工程学院,苏州 215009;江苏省分离净化材料与技术工程研究中心,苏州 215009;江苏省水处理技术与材料协同创新中心,苏州 215009
- 折叠
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)在聚醚砚(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3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.
Abstract
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.
关键词
疏松纳滤膜/界面聚合/麦芽糖醇/染料/盐分离Key words
loose nanofiltration membrane/interfacial polymerization/Maltitol/dye/salt separation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据