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

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作  者:张全合 刘大朋 洪耀良 ZHANG Quanhe;LIU Da peng;HONG Yaoliang(School of Environment Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;Jiangsu Separation and Purification Materials and Technology Engineering Research Center,Suzhou 215009,China;Jiangsu Collaborative Innovation Center of Water Treatment Technology and Material,Suzhou 215009,China)

机构地区:[1]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

出  处:《膜科学与技术》2024年第3期133-142,共10页Membrane Science and Technology

基  金:国家自然科学基金(51908394)。

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/(m^(2)·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.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/(m^(2)·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 Na_(2)SO_(4) 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 

分 类 号:TQ028.8[化学工程]

 

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