Asymmetric Janus membranes based on hydrophilic modification of dopamine for efficient oil/water separation

被引：0
|
作者：
Shan L. [1 ]
Yang Z. [1 ]
Yan G. [1 ]
Li C. [1 ]
Li H. [1 ]
Wang Z. [1 ]
机构：
[1] National-Local Joint Engineering Laboratory for Energy Conservation of Chemical Process Integration and Resources Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2022年 / 41卷 / 12期
关键词：
alternating soaking; asymmetric wettability; Janus membrane; oil/water emulsion separation; poly(vinylidenefluoride) (PVDF);
D O I：
10.16085/j.issn.1000-6613.2022-0268
中图分类号：
学科分类号：
摘要：
Current special wetting materials used for treating oily wastewater are usually divided into the oil-removing type or the water-removing type, which are limited to separating single emulsion. In this paper, Janus membranes with asymmetric wettability were fabricated by alternating soaking process and non-woven peeling upon dopamine-modified PVDF membranes. By facilely adjusting the number of alternating soaking and peeling the nonwoven fabric, superhydrophilic/underwater superoleophobic surface and superhydrophobic/superoleophobic bottom surface could be respectively obtained, where the discrepancy in water contact angle between these two surfaces water contact angle was up to 150°. Based on the asymmetric wettability of Janus membranes, high permeate flux of 367L/(m2·h) and 1729L/(m2·h) were achieved for surfactant-stabilized oil-in-water (O/W) and water-in-oil (W/O) emulsions by simply switching the transmembrane direction, where the COD in the permeate of oil-in-water fulfilled the petrochemical discharge standard and the water content in the permeate of water-in-oil was less than 80mg/L, achieving efficient separation of O/W and W/O emulsions. Moreover, Janus membranes exhibited ideal antifouling property and reusability during BSA solution separation process. © 2022 Chemical Industry Press. All rights reserved.
引用
收藏
页码：6500 / 6510
页数：10
相关论文
共 27 条
  • [1] LIU Yuan, SU Yanlei, LI Yafei, Et al., Improved antifouling property of PVDF membranes by incorporating an amphiphilic block-like copolymer for oil/water emulsion separation, RSC Advances, 5, 27, pp. 21349-21359, (2015)
  • [2] PRONK Wouter, DING An, MORGENROTH Eberhard, Et al., Gravity-driven membrane filtration for water and wastewater treatment: a review, Water Research, 149, pp. 553-565, (2019)
  • [3] GAO Yifan, YAN Ni, JIANG Chengxu, Et al., Filtration-enhanced highly efficient photocatalytic degradation with a novel electrospun rGO@TiO<sub>2</sub> nanofibrous membrane: Implication for improving photocatalytic efficiency, Applied Catalysis B: Environmental, 268, (2020)
  • [4] SUN Zekun, ZHOU Yuxin, JIAO Yang, Et al., Multi-hydrophilic functional network enables porous membranes excellent anti-fouling performance for highly efficient water remediation, Journal of Membrane Science, 608, (2020)
  • [5] SUN S P, HATTON T A, CHAN S Y, Et al., Novel thin-film composite nanofiltration hollow fiber membranes with double repulsion for effective removal of emerging organic matters from water, Journal of Membrane Science, 401, 402, pp. 152-162, (2012)
  • [6] KOROS W J, ZHANG C., Materials for next-generation molecularly selective synthetic membranes, Nature Materials, 16, 3, pp. 289-297, (2017)
  • [7] SONG Haiming, CHEN Cheng, SHUI Xiaoxue, Et al., Asymmetric Janus membranes based on in situ mussel-inspired chemistry for efficient oil/water separation, Journal of Membrane Science, 573, pp. 126-134, (2019)
  • [8] MA Houying, HU Yining, YANG Hao, Et al., In situ mussel-inspired Janus membranes using catechol and polyethyleneimine as the additives for highly efficient oil/water emulsions separation, Separation and Purification Technology, 262, (2021)
  • [9] LIU Peng, GAO Yining, WANG Fazhou, Et al., Superhydrophobic and self-cleaning behavior of Portland cement with lotus-leaf-like microstructure, Journal of Cleaner Production, 156, pp. 775-785, (2017)
  • [10] WANG Zijie, LIU Guojun, HUANG Shuaishuai, In situ generated Janus fabrics for the rapid and efficient separation of oil from oil-in-water emulsions, Angewandte Chemie International Edition, 55, 47, pp. 14610-14613, (2016)
123