Engineering dual-heterogeneous membrane surface with heterostructured modifier to integrate multi-defense antifouling mechanisms

Runnan Zhang, Yu Zheng, Niaz Ali Khan, Kang Gao, Shiyu Zhang, Chao Yang, Jingyuan Guan, Roni Kasher, Zhongyi Jiang

Research output: Contribution to journalArticlepeer-review

Abstract

Membrane fouling is one of the main bottlenecks in membrane separation processes for water purification. Due to the complexity of foulants, engineering the membrane surface to coordinate multi-defense mechanisms is essential for fabricating membranes with broad-spectrum antifouling performance. In this study, we synthesized a heterostructured modifier comprising zwitterionic, fluorine-containing polymeric segments and inorganic silver nanoparticles. The heterostructured modifiers were synergistically segregated to the membrane surface during non-solvent induced phase separation. A dual-heterogeneous surface structure was formed, compromising physicochemical heterogeneity with hydrophilic-low surface energy-antibacterial domains, as well as topological heterogeneity with nanopapillae. Consequently, multi-defense mechanisms including passive fouling resistance, fouling release and active antibacterial mechanisms were integrated to the membrane surface, leading to superior antifouling performances against oil-in-water emulsions with ultralow total flux decline ratio of 3.3% and the flux recovery ratio of nearly 100%, as well as nearly 100% antibacterial activity against E. Coli with an obvious inhibition zone.

Original languageAmerican English
Article number100103
JournalChemical Engineering Science: X
Volume11
DOIs
StatePublished - 1 Aug 2021

Keywords

  • Antibacterial
  • Antifouling membrane
  • Heterogeneous structure
  • Multi-defense mechanism
  • Surface segregation

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering

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