ZIF-8-NH2/有机硅杂化膜的制备及渗透汽化脱盐性能研究  

Fabrication of ZIF-8-NH2/Organosilica Hybrid Membranes for Pervaporation Desalination

作　　者：朱春晖 徐荣[1] 任秀秀 左士祥[1] 龚耿浩 钟璟[1] ZHU Chunhui;XU Rong;REN Xiuxiu;ZUO Shixiang;GONG Genghao;ZHONG Jing(Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology,School of Petrochemical Engineering,Changzhou University,Changzhou 213164,China;State Key Laboratory of Separation Membranes and Membrane Processes,School of Material Science and Engineering,Tiangong University,Tianjin 300387,China)

机构地区：[1]常州大学石油化工学院,江苏省绿色催化材料与技术重点实验室,常州213164 [2]天津工业大学材料科学与工程学院,分离膜与膜过程国家重点实验室,天津300387

出　　处：《无机材料学报》2020年第11期1239-1246,共8页Journal of Inorganic Materials

基　　金：国家自然科学基金(21406018);江苏省高校自然科学研究重大项目(18KJA530001);江苏省绿色催化材料与技术重点实验室项目(BM2012110)。

摘　　要：石油和天然气开采、电厂脱硫及海水淡化等工业活动会产生大量的高含盐废水,有效处理这些高盐废水是实现液体零排放的关键。本研究以多孔α-Al2O3陶瓷膜为支撑体,将氨基功能化的沸石咪唑酯骨架结构材料(ZIF-8-NH2)填充到1,2-二(三乙氧基硅基)乙烷(BTESE)中,制得ZIF-8-NH2/有机硅杂化膜,将其应用于高浓度盐水渗透汽化脱盐,并系统考察了ZIF-8-NH2含量、进料温度与浓度等因素对其脱盐性能的影响。实验结果表明,与BTESE膜及ZIF-8/BTESE杂化膜相比,氨基功能化的ZIF-8-NH2/BTESE杂化膜的水渗透率和盐截留率均有所提高。在连续50 h渗透汽化脱盐测试中,ZIF-8-NH2/BTESE杂化膜表现出优异的结构稳定性,NaCl表观截留率始终保持在99.95%以上,水渗透率保持在6.3×10−11 m3/(m2·s·Pa)以上。此外,NaCl截留率几乎不受进料温度和进料浓度的影响,在高盐废水处理领域表现出良好的应用前景。Industrial activities such as oil and gas drilling,power plant desulfurization and seawater desalination produce large amounts of high-salinity waste water.The effective treatment of the high-salinity waste water is the key to achieve zero liquid discharge.In the present study,ZIF-8-NH2/organosilica hybrid membranes were fabricated via the incorporation of ZIF-8-NH2 nanoparticles into BTESE-derived organosilica networks,using porousα-Al2O3 membranes as the supports.The as-prepared ZIF-8-NH2/BTESE hybrid membranes were applied to the desalination of high-salinity waste water by pervaporation.The effects of ZIF-8-NH2 content,feed temperature and feed concentration on desalination performances were systematically investigated.Compared with BTESE and ZIF-8/BTESE membranes,the amine-functionalized ZIF-8-NH2/BTESE hybrid membranes showed a simultaneous improvement in water permeance and salt rejection.In addition,the ZIF-8-NH2/BTESE hybrid membrane exhibited a high structural stability during the continuous pervaporation test up to 50 h,always delivering very high NaCl rejections of>99.95%and water permeances of>6.3×10−11 m3/(m2·s·Pa).Moreover,the NaCl rejection of the membrane was almost constant regardless of feed temperature and feed concentration,showing great promise as a highly efficient membrane for the application in the desalination of high-salinity water.

关 键 词：膜 有机硅 脱盐 渗透汽化 

分 类 号：TQ028[化学工程]