SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2024, Vol. 66 ›› Issue (2): 285-297.DOI: 10.1016/j.cjche.2023.11.003

• Full Length Article • 上一篇    下一篇

Anti-abrasion collagen fiber-based membrane functionalized by UiO-66-NH2 with ultra-high efficiency and stability for oil-in-water emulsions separation

Xiaoxia Ye1, Rixin Huang1, Zhihong Zheng1, Juan Liu1, Jie Chen2, Yuancai Lv1   

  1. 1. College of Environmental and Safety Engineering, Fuzhou University, Fuzhou 350108, China;
    2. College of Chemical Engineering, Fuzhou University, Fuzhou 350108, China
  • 收稿日期:2023-09-13 修回日期:2023-11-04 出版日期:2024-02-28 发布日期:2024-04-20
  • 通讯作者: Jie Chen,E-mail:jiechen@fzu.edu.cn;Yuancai Lv,E-mail:yclv@fzu.edu.cn
  • 基金资助:
    This work was supported by National Natural Science Foundation of China (22008035; 22108040; 22378066), Science and Technology Project of Environmental Protection in Fujian (2022R026) and Natural Science Foundation of Fujian Province (2020J05131; 2020J05130).

Anti-abrasion collagen fiber-based membrane functionalized by UiO-66-NH2 with ultra-high efficiency and stability for oil-in-water emulsions separation

Xiaoxia Ye1, Rixin Huang1, Zhihong Zheng1, Juan Liu1, Jie Chen2, Yuancai Lv1   

  1. 1. College of Environmental and Safety Engineering, Fuzhou University, Fuzhou 350108, China;
    2. College of Chemical Engineering, Fuzhou University, Fuzhou 350108, China
  • Received:2023-09-13 Revised:2023-11-04 Online:2024-02-28 Published:2024-04-20
  • Contact: Jie Chen,E-mail:jiechen@fzu.edu.cn;Yuancai Lv,E-mail:yclv@fzu.edu.cn
  • Supported by:
    This work was supported by National Natural Science Foundation of China (22008035; 22108040; 22378066), Science and Technology Project of Environmental Protection in Fujian (2022R026) and Natural Science Foundation of Fujian Province (2020J05131; 2020J05130).

摘要: Membrane separation strategies offer promising platform for the emulsion separation. However, the low mechanical strength of membrane separation layers and the trade-off between separation flux and efficiency present significant challenges. In this study, we report a CFM@UiO-66-NH2 membrane with high separation flux, efficiency and stability, through utilizing a robust anti-abrasion collagen fiber membrane (CFM) as the multifunctional support and UiO-66-NH2 by an in-situ growth as the separation layer. The high mechanical strength of the CFM compensated for the weakness of the separation layer, while the charge-breaking effect of UiO-66-NH2, along with the size sieving of its constituent separating layers and the capillary effect of the collagen fibers, contributed to the potential for efficient separation. Additionally, the CFM@UiO-66-NH2 membrane exhibited superhydrophilic properties, making it suitable for separating oil-in-water microemulsions and nanoemulsions stabilized by anionic surfactants. The membrane demonstrated remarkable separation efficiencies of up to 99.960 % and a separation flux of 370.05L·m-2·h-1. Moreover, it exhibits stability, durability, and abrasion resistance, maintaining excellent separation performance even when exposed to strong acids and alkalis without any damage to its structure and performance. After six cycles of reuse, it achieved a separation flux of 417.97L·m-2·h-1 and a separation efficiency of 99.747 %. Furthermore, after undergoing 500 cycles of strong abrasion, the separation flux remained at 124.39L·m-2·h-1, with a separation efficiency of 99.992 %. These properties make it suitable for the long-term use in harsh operating environments. We attribute these properties to the electrostatic effect resulting from the amino group on UiO-66-NH2 and its in-situ growth on the CFM, which forms a size-screening separation layer. Our work highlights the potential of the CFM@UiO-66-NH2 membrane as an environmentally friendly size-screening material for the efficient emulsion wastewater separation.

关键词: Collagen fibers, Metal-organic frameworks, Oil-in-water emulsion separation, Size sieving

Abstract: Membrane separation strategies offer promising platform for the emulsion separation. However, the low mechanical strength of membrane separation layers and the trade-off between separation flux and efficiency present significant challenges. In this study, we report a CFM@UiO-66-NH2 membrane with high separation flux, efficiency and stability, through utilizing a robust anti-abrasion collagen fiber membrane (CFM) as the multifunctional support and UiO-66-NH2 by an in-situ growth as the separation layer. The high mechanical strength of the CFM compensated for the weakness of the separation layer, while the charge-breaking effect of UiO-66-NH2, along with the size sieving of its constituent separating layers and the capillary effect of the collagen fibers, contributed to the potential for efficient separation. Additionally, the CFM@UiO-66-NH2 membrane exhibited superhydrophilic properties, making it suitable for separating oil-in-water microemulsions and nanoemulsions stabilized by anionic surfactants. The membrane demonstrated remarkable separation efficiencies of up to 99.960 % and a separation flux of 370.05L·m-2·h-1. Moreover, it exhibits stability, durability, and abrasion resistance, maintaining excellent separation performance even when exposed to strong acids and alkalis without any damage to its structure and performance. After six cycles of reuse, it achieved a separation flux of 417.97L·m-2·h-1 and a separation efficiency of 99.747 %. Furthermore, after undergoing 500 cycles of strong abrasion, the separation flux remained at 124.39L·m-2·h-1, with a separation efficiency of 99.992 %. These properties make it suitable for the long-term use in harsh operating environments. We attribute these properties to the electrostatic effect resulting from the amino group on UiO-66-NH2 and its in-situ growth on the CFM, which forms a size-screening separation layer. Our work highlights the potential of the CFM@UiO-66-NH2 membrane as an environmentally friendly size-screening material for the efficient emulsion wastewater separation.

Key words: Collagen fibers, Metal-organic frameworks, Oil-in-water emulsion separation, Size sieving