Ultrathin organic solvent nanofiltration membrane with polydopamine-HKUST-1 interlayer for organic solvent separation

作     者：Haike Li Xindong Li Guozai Ouyang Lijinhong Huang Lang Li Wenhao Li Wanfu Huang Duokun Li Haike Li;Xindong Li;Guozai Ouyang;Lijinhong Huang;Lang Li;Wenhao Li;Wanfu Huang;Duokun Li

作者机构：Ganzhou Key Laboratory of Basin Pollution Simulation and ControlJiangxi University of Science and TechnologyGanzhou 341000China Innovation Center for Water Quality Security Technology at Ganjiang River BasinJiangxi University of Science and TechnologyGanzhou 341000China School of Architecture and DesignJiangxi University of Science and TechnologyGanzhou 341000China WA School of Mines:MineralsEnergy and Chemical EngineeringCurtin UniversityWA 6845Australia School of Materials Science and EngineeringTiangong UniversityTianjin 300387China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2024年第141卷第7期

页      面：182-193页

核心收录：

学科分类：080706[工学-化工过程机械] 083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：supported by the National Natural Science Foundation of China(No.41662004) the 2022 Jiangxi University Student Innovation and Entrepreneurship Training Program(No.S202210407027) the Jiangxi Graduate Innovation Fund(No.YC2021-S557) the Opening Project of Henan Province Key Laboratory of Water Pollution Control and Rehabilitation Technology(No.CJSP2022002)。 

主　　题：Interfacial polymerization Organic solvent nanofiltration Interlayer Metal-organic frameworks Polydopamine 

摘      要：Polydopamine(PDA)and metal-organic skeleton HKUST-1 were co-deposited on the base membrane of hexamethylenediamine(HDA)-crosslinked polyetherimide(PEI)ultrafiltration membrane as the interlayer,and high-throughput organic solvent nanofiltration membrane(OSN)was prepared by interfacial polymerization and solvent activation reaction.The polyamide(PA)layer surface roughness from 28.4 nm in PA/PEI to 78.3 nm in PA/PDA-HKUST-10.6/PEI membrane,reduced the thickness of the separation layer from 79 to 14 nm,and significantly improved the hydrophilic,thermal and mechanical properties.The flux of the PA/PDA-HKUST-10.6/PEI membrane in a 0.1 g/L Congo Red(CR)ethanol solution at 0.6 MPa test pressure reached 21.8 L/(m^(2)·hr)and the rejection of CR was 92.8%.Solvent adsorption test,N,N-dimethylformamide(DMF)immersion experiment,and long-term operation test in ethanol showed that the membranes had high solvent tolerance.The solvent flux test demonstrated that,under the test pressure of 0.6 MPa,the flux of different solvents ranked as follows:methanol(56.9 L/(m^(2)·hr))DMF(39.6 L/(m^(2)·hr))ethanol(31.2 L/(m^(2)·hr))IPA(4.5 L/(m^(2)·hr))N-hexane(1.9 L/(m^(2)·hr)).The ability of the membranes to retain dyes in IPA/water dyes solution was also evaluated.The flux of the membrane was 30.4 L/(m^(2)·hr)and the rejection of CR was 91.6%when the IPA concentration reached 50%.This OSN membrane-making strategy is economical,environment-friendly and efficient,and has a great application prospect in organic solvent separation systems.