In-situ cross-linked porous anion exchange membranes with high performance for efficient acid recovery

Jiuyang Lin, Xu Dan, Jing Wang, Sisi Huang, Lihai Fan, Ming Xie, Shuaifei Zhao, Xiaocheng Lin

Research output: Contribution to journalArticlepeer-review

3 Citations (SciVal)

Abstract

Diffusion dialysis (DD) has high economic competitiveness for acid recovery; however, the fabrication of highly acid-permeable and salt-rejecting anion exchange membranes (AEMs) for DD is still a grand challenge. This paper presents in-situ cross-linked porous AEMs with tunable microstructures and high DD performance. The AEMs were fabricated based on chloromethyl polyethersulfone substrate using N, N, N′, N″, N″-pentamethyldiethylenetriamine as a bifunctional agent for cross-linking and quaternization. The prepared porous AEMs showed significantly superior DD performance over conventional dense AEMs due to the high free volume and cross-linked networks within our membranes. The acid dialysis coefficient (UH+) and acid/salt separation factor (S) of the optimal AEM were 2.6 and 255.4 times as high as those of the commercial DF-120 AEM, respectively. Therefore, our low-cost, high-performance in-situ cross-linked porous AEMs may pave the way for large-scale acid recovery applications.

Original languageEnglish
Article number121499
JournalJournal of Membrane Science
Volume673
Early online date18 Feb 2023
DOIs
Publication statusPublished - 5 May 2023

Bibliographical note

Funding Information:
This work is supported by the National Key R & D Program of China (Grant No: 2021YFC2902802 ), the National Natural Science Foundation of China (Grant No: 21808038 ), and the Award Program for Minjiang Scholar Professorship . The authors also acknowledge Dr. Qiuhua Li from the Instruments' Center for Physical Science at the University of Science and Technology of China for collecting the XPS spectra, and Mr. Yongping Chen for his kind help in instrument processing.

Data availability
The data that has been used is confidential.

Keywords

  • Acid recovery
  • Anion exchange membrane
  • Diffusion dialysis
  • In-situ cross-linking

ASJC Scopus subject areas

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

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