摘要
为提高膜对印染废水的染料/盐分离效果,以3,5-二羟基苯甲酸为单体,通过低反应活性的羟基与均苯三甲酰氯(TMC)反应,在聚醚砜底膜表面通过界面聚合(IP)制备了新型聚酯疏松纳滤膜。对聚酯复合膜的化学组成、表面性质、表面形貌进行了表征,阐述了复合膜的结构性能关系,研究了不同的制备条件对复合膜的性能影响。在3,5-二羟基苯甲酸、氢氧化钠、均苯三甲酰氯质量分数分别为0.3%、0.2%、0.1%,界面聚合1 min的条件下,聚酯复合膜具有超高渗透性[水通量77.74 L/(m^(2)·h·bar)]、高染料截留率(刚果红,99.64%;直接红23,98.48%)和高盐渗透率(氯化钠,91.51%;硫酸钠,85.63%)。在2 bar压力下对染料/盐混合溶液进行5 h的过滤实验,所制复合膜表现出优异的防污性和运行稳定性。
In order to improve the dye/salt separation effect of the membrane on printing and dyeing wastewater,a new polyester loose nanofiltration membrane was prepared by interfacial polymerization(IP)on the surface of polyethersulfone bottom membrane by reacting with 3,5-dihydroxybenzoic acid as monomer and reacting with homobenzene trimacyl chloride(TMC)by low reactivity hydroxyl group.The chemical composition,surface properties and surface morphology of polyester composite film were characterized,the structural performance relationship of composite film was elaborated,and the influence of different preparation conditions on the performance of composite film was studied.Under the conditions of 3,5-dihydroxybenzoic acid,sodium hydroxide and benzenetricarbonyl chloride mass fractions of 0.3%,0.2%and 0.1%,respectively,and interfacial polymerization of 1 min,polyester composite film has ultra-high permeability[77.74 L/(m^(2)·h·bar)]and high dye retention rate(congo red,99.64%;direct red 23,98.48%)and high salt permeability(NaCl,91.51%;Sodium sulfate,85.63%).In a filtration experiment on the dye/salt mixture solution at 2 bar for 5 h,the composite membrane shows excellent antifouling and operational stability.
作者
郑阿龙
刘大朋
洪耀良
ZHENG Along;LIU Dapeng;HONG Yaoliang(College of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;Jiangsu Province Engineering Research Center for Separation and Purification Materials and Technology,Suzhou 215009,China;Jiangsu Collaborative Innovation Center of Water Treatment Technology and Materials,Suzhou 215009,China)
出处
《塑料工业》
CAS
CSCD
北大核心
2024年第2期112-119,152,共9页
China Plastics Industry
基金
国家自然科学基金项目(51908394)。
关键词
疏松纳滤
界面聚合
3
5-二羟基苯甲酸
染料/盐分离
聚醚砜
Loose Nanofiltration
Interfacial Polymerization
3,5-Dihydroxybenzoic Acid
Dye/Salt Separation
Polyethersulfone
