SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2024, Vol. 76 ›› Issue (12): 105-117.DOI: 10.1016/j.cjche.2024.07.015

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The robust design of PMIA braided tube reinforced PFA hollow fiber membranes with graphene doping for water-in-oil separation

Wei Zhao1, Xin Jin1, Kaikai Chen1, Haoyang Ling3, Hailiang Liu1, Changfa Xiao1,2   

  1. 1. School of Materials Science and Engineering, and State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, China;
    2. Fiber Materials Research Center, School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, China;
    3. CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2024-02-22 Revised:2024-07-21 Accepted:2024-07-30 Online:2024-08-28 Published:2024-12-28
  • Contact: Xin Jin,E-mail:jinxin@tiangong.edu.cn;Kaikai Chen,E-mail:chenkaikai@tiangong.edu.cn
  • Supported by:
    The authors gratefully acknowledge the research funding provided by the National Natural Science Foundation of China (52103035, 52173038).

The robust design of PMIA braided tube reinforced PFA hollow fiber membranes with graphene doping for water-in-oil separation

Wei Zhao1, Xin Jin1, Kaikai Chen1, Haoyang Ling3, Hailiang Liu1, Changfa Xiao1,2   

  1. 1. School of Materials Science and Engineering, and State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, China;
    2. Fiber Materials Research Center, School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, China;
    3. CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  • 通讯作者: Xin Jin,E-mail:jinxin@tiangong.edu.cn;Kaikai Chen,E-mail:chenkaikai@tiangong.edu.cn
  • 基金资助:
    The authors gratefully acknowledge the research funding provided by the National Natural Science Foundation of China (52103035, 52173038).

Abstract: In order to solve the problem of oily wastewater, the poly(m-phenyleneisophthalamide) (PMIA) braided tube reinforced (PBR) poly(tetrafluoroethylene-co-perfluoropropyl vinyl ether) (PFA) hollow fiber membrane with thermal and solvent resistant property was prepared via no-solvent green method. The membrane surface and pore structure was optimized by changing the sintering temperature and graphene (GE) content. The morphologies showed that the spherical surface with good lipophilicity was formed, and the excellent mechanical strength with a favorable interface bonding state could be obtained due to the PFA melts permeating into the supporting layer. The doping of GE produced synergistic effects with the sintering temperature owing to its good thermal conductivity and pore formation. The PBR-PFA/GE hollow fiber membrane exhibited good hydrophobicity and lipophilicity with more than 97% separation efficiency for different oil products at -0.02 MPa. With the addition of GE, the average pore size first increases and then decreases, and the porosity gradually decreases. In addition, the hollow fiber membrane showed high separation ability to the water-in-oil emulsion, and maintained a stable flux recovery rate after recycling, making it possible to apply in the field of oily wastewater treatment.

Key words: Poly(tetrafluoroethylene-co-vinylether), Graphene, PMIA braided tube, Hollow fiber membrane, Oil-water separation

摘要: In order to solve the problem of oily wastewater, the poly(m-phenyleneisophthalamide) (PMIA) braided tube reinforced (PBR) poly(tetrafluoroethylene-co-perfluoropropyl vinyl ether) (PFA) hollow fiber membrane with thermal and solvent resistant property was prepared via no-solvent green method. The membrane surface and pore structure was optimized by changing the sintering temperature and graphene (GE) content. The morphologies showed that the spherical surface with good lipophilicity was formed, and the excellent mechanical strength with a favorable interface bonding state could be obtained due to the PFA melts permeating into the supporting layer. The doping of GE produced synergistic effects with the sintering temperature owing to its good thermal conductivity and pore formation. The PBR-PFA/GE hollow fiber membrane exhibited good hydrophobicity and lipophilicity with more than 97% separation efficiency for different oil products at -0.02 MPa. With the addition of GE, the average pore size first increases and then decreases, and the porosity gradually decreases. In addition, the hollow fiber membrane showed high separation ability to the water-in-oil emulsion, and maintained a stable flux recovery rate after recycling, making it possible to apply in the field of oily wastewater treatment.

关键词: Poly(tetrafluoroethylene-co-vinylether), Graphene, PMIA braided tube, Hollow fiber membrane, Oil-water separation