Journal of Inorganic Materials ›› 2020, Vol. 35 ›› Issue (11): 1239-1246.DOI: 10.15541/jim20200007

• RESEARCH PAPER • Previous Articles     Next Articles

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

ZHU Chunhui1, XU Rong1, REN Xiuxiu1, ZUO Shixiang1, GONG Genghao2, ZHONG Jing1   

  1. 1. Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China;
    2. State Key Laboratory of Separation Membranes and Membrane Processes, School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
  • Received:2020-01-06 Revised:2020-03-16 Published:2020-11-20 Online:2020-03-20
  • About author:ZHU Chunhui(1995-), male, Master candidate. E-mail: cczuzhuchunhui@163.com

Abstract: 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 porous α-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.

Key words: membrane, organosilica, desalination, pervaporation

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