SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 57 ›› Issue (5): 17-29.DOI: 10.1016/j.cjche.2022.09.014

• Full Length Article • 上一篇    下一篇

Tannic acid/Fe3+ interlayer for preparation of high-permeability polyetherimide organic solvent nanofiltration membranes for organic solvent separation

Haike Li, Xindong Li, Guozai Ouyang, Lang Li, Zhaohuang Zhong, Meng Cai, Wenhao Li, Wanfu Huang   

  1. Ganzhou Key Laboratory of Basin Pollution Simulation and Control, Jiangxi University of Science and Technology, Ganzhou 341000, China;Innovation Center for Water Quality Security Technology at Ganjiang River Basin, Jiangxi University of Science and Technology, Ganzhou 341000, China
  • 收稿日期:2022-06-14 修回日期:2022-08-28 出版日期:2023-05-28 发布日期:2023-07-08
  • 通讯作者: Xindong Li,E-mail:lixind@163.com
  • 基金资助:
    This work was supported by grants from the National Natural Science Foundation of China (41662004), the Jiangxi Graduate Innovation Fund (YC2021-S557), China.

Tannic acid/Fe3+ interlayer for preparation of high-permeability polyetherimide organic solvent nanofiltration membranes for organic solvent separation

Haike Li, Xindong Li, Guozai Ouyang, Lang Li, Zhaohuang Zhong, Meng Cai, Wenhao Li, Wanfu Huang   

  1. Ganzhou Key Laboratory of Basin Pollution Simulation and Control, Jiangxi University of Science and Technology, Ganzhou 341000, China;Innovation Center for Water Quality Security Technology at Ganjiang River Basin, Jiangxi University of Science and Technology, Ganzhou 341000, China
  • Received:2022-06-14 Revised:2022-08-28 Online:2023-05-28 Published:2023-07-08
  • Contact: Xindong Li,E-mail:lixind@163.com
  • Supported by:
    This work was supported by grants from the National Natural Science Foundation of China (41662004), the Jiangxi Graduate Innovation Fund (YC2021-S557), China.

摘要: Organic solvent nanofiltration (OSN) membranes have a great application prospect in organic solvent separation, but the development of OSN membranes is mainly restricted by trade-off between permeability and rejection rate. In this work, a TA/Fe3+ polymer was introduced into polyetherimide (PEI) ultrafiltration membranes crosslinked with hexamethylene diamine as the intermediate layer, and OSN membranes with high separation performance and solvent permeability were obtained through interfacial polymerization and solvent activation. The interlayer with high surface hydrophilicity and a fixed pore structure controlled the adsorption/diffusion of the amine monomer during interfacial polymerization, forming a smooth (average surface roughness < 5.5 nm), ultra-thin (separation layer thickness reduced from 150 to 16 nm) and dense surface structure polyamide (PA) layer. The PA--HDA/PEI membrane retained more than 94% of methyl blue (BS) in 0.1 g·L-1 BS ethanol solution at 0.6 MPa, and the ethanol permeation reached 28.56 L-1·m-2·h-1. The average flux recovery ratio (FRR) of PA--HDA/PEI membrane was found to be 84%, which has better fouling resistance than PA-HDA/PEI membrane, and it was found to have better stability performance through different solvent immersion experiments and continuous operation in 0.1 g·L-1 BS ethanol solution. Compared with thin-film composite nanofiltration membranes, the PA--HDA/PEI membrane can be manufactured from an economical and environment-friendly method and overcomes the trade-off between permeability and rejection rate, showing great application potential in organic solvent separation systems.

关键词: Nanofiltration membrane, Waste treatment, Surface, Filtration, Tannic acid, Interfacial polymerization

Abstract: Organic solvent nanofiltration (OSN) membranes have a great application prospect in organic solvent separation, but the development of OSN membranes is mainly restricted by trade-off between permeability and rejection rate. In this work, a TA/Fe3+ polymer was introduced into polyetherimide (PEI) ultrafiltration membranes crosslinked with hexamethylene diamine as the intermediate layer, and OSN membranes with high separation performance and solvent permeability were obtained through interfacial polymerization and solvent activation. The interlayer with high surface hydrophilicity and a fixed pore structure controlled the adsorption/diffusion of the amine monomer during interfacial polymerization, forming a smooth (average surface roughness < 5.5 nm), ultra-thin (separation layer thickness reduced from 150 to 16 nm) and dense surface structure polyamide (PA) layer. The PA--HDA/PEI membrane retained more than 94% of methyl blue (BS) in 0.1 g·L-1 BS ethanol solution at 0.6 MPa, and the ethanol permeation reached 28.56 L-1·m-2·h-1. The average flux recovery ratio (FRR) of PA--HDA/PEI membrane was found to be 84%, which has better fouling resistance than PA-HDA/PEI membrane, and it was found to have better stability performance through different solvent immersion experiments and continuous operation in 0.1 g·L-1 BS ethanol solution. Compared with thin-film composite nanofiltration membranes, the PA--HDA/PEI membrane can be manufactured from an economical and environment-friendly method and overcomes the trade-off between permeability and rejection rate, showing great application potential in organic solvent separation systems.

Key words: Nanofiltration membrane, Waste treatment, Surface, Filtration, Tannic acid, Interfacial polymerization