SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 64 ›› Issue (12): 177-187.DOI: 10.1016/j.cjche.2023.06.019

• Full Length Article • 上一篇    下一篇

Preparation of ZIF-8@PEBAX/PVDF nanocomposite membrane by the combination of self-assembly and in-situ growth for removing thiophene from the model gasoline

Zhesai Zhao1, Qingwen Han2, Wenwen He3, Xiaolong Han1   

  1. 1. School of Chemical Engineering, Northwest University, Xi'an 710069, China;
    2. Hubei Three Gorges Laboratory, Yichang 443007, China;
    3. School of Chemistry and Life Science, Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, China
  • 收稿日期:2023-03-18 修回日期:2023-06-12 出版日期:2023-12-28 发布日期:2024-02-05
  • 通讯作者: Wenwen He,E-mail:heww@ccut.edu.cn;Xiaolong Han,E-mail:hanxl@nwu.edu.cn
  • 基金资助:
    This work was financially supported by the National Natural Science Foundation of China (22271022) and Hubei Three Gorges Laboratory (SK212001).

Preparation of ZIF-8@PEBAX/PVDF nanocomposite membrane by the combination of self-assembly and in-situ growth for removing thiophene from the model gasoline

Zhesai Zhao1, Qingwen Han2, Wenwen He3, Xiaolong Han1   

  1. 1. School of Chemical Engineering, Northwest University, Xi'an 710069, China;
    2. Hubei Three Gorges Laboratory, Yichang 443007, China;
    3. School of Chemistry and Life Science, Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, China
  • Received:2023-03-18 Revised:2023-06-12 Online:2023-12-28 Published:2024-02-05
  • Contact: Wenwen He,E-mail:heww@ccut.edu.cn;Xiaolong Han,E-mail:hanxl@nwu.edu.cn
  • Supported by:
    This work was financially supported by the National Natural Science Foundation of China (22271022) and Hubei Three Gorges Laboratory (SK212001).

摘要: Metal-organic frameworks (MOFs) have gained attention in the development of MOFs/polymer hybrid membranes for pervaporation. However, the agglomeration of MOFs particles and interfacial defects limit its further application. In this study, we present a novel approach to fabricate a ZIF-8@PEBAX/PVDF nanocomposite membrane for removing thiophene from the model gasoline by combination of self-assembly and in-situ growth. Firstly, a PVDF supporting membrane was modified to have a negative charge. Next, positively charged zinc ions were attracted onto the negatively charged PVDF supporting membrane through electrostatic interaction. Afterwards, the Zinc ions deposited PVDF membrane was immersed into dimethylimidazole solution to form a uniform ZIF-8 layer. Finally, the ZIF-8 layer was coated with poly (ether-block-amide) (PEBAX) using the pouring method. Experimental results showed that the separating efficiency of the ZIF-8@PEBAX/PVDF nanocomposite membrane was improved significantly compared to that of pristine PEBAX membrane. The optimal permeation flux and enrichment factor of membrane were 27.80 kg·(m2·h)-1 and 6.9, respectively.

关键词: Nanocomposite membrane, ZIF-8 nanoparticles, PEBAX, Thiophene

Abstract: Metal-organic frameworks (MOFs) have gained attention in the development of MOFs/polymer hybrid membranes for pervaporation. However, the agglomeration of MOFs particles and interfacial defects limit its further application. In this study, we present a novel approach to fabricate a ZIF-8@PEBAX/PVDF nanocomposite membrane for removing thiophene from the model gasoline by combination of self-assembly and in-situ growth. Firstly, a PVDF supporting membrane was modified to have a negative charge. Next, positively charged zinc ions were attracted onto the negatively charged PVDF supporting membrane through electrostatic interaction. Afterwards, the Zinc ions deposited PVDF membrane was immersed into dimethylimidazole solution to form a uniform ZIF-8 layer. Finally, the ZIF-8 layer was coated with poly (ether-block-amide) (PEBAX) using the pouring method. Experimental results showed that the separating efficiency of the ZIF-8@PEBAX/PVDF nanocomposite membrane was improved significantly compared to that of pristine PEBAX membrane. The optimal permeation flux and enrichment factor of membrane were 27.80 kg·(m2·h)-1 and 6.9, respectively.

Key words: Nanocomposite membrane, ZIF-8 nanoparticles, PEBAX, Thiophene