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Chelation-directed interface engineering of in-place self-cleaning membranes

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
 [1];  [1];  [2];  [3];  [1];  [1];  [1];  [4];  [5];  [1]
  1. Ministry of Industry and Information Technology Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
  2. Longjiang Environmental Protection Group CO., LTD, Harbin 150050, People’s Republic of China
  3. School of Marine Science and Technology, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Weihai 264209, People’s Republic of China
  4. Institute for Nanotechnology and Water Sustainability, College of Engineering, Science and Technology, University of South Africa, Roodepoort 1709, South Africa
  5. Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL 60439, Advanced Materials for Energy-Water Systems Energy Frontier Research Center, Argonne National Laboratory, Lemont, IL 60439, Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL 60637

Water–energy sustainability will depend upon the rapid development of advanced pressure-driven separation membranes. Although energy-efficient, water-treatment membranes are constrained by ubiquitous fouling, which may be alleviated by engineering self-cleaning membrane interfaces. In this study, a metal-polyphenol network was designed to direct the armorization of catalytic nanofilms (ca. 18 nm) on inert polymeric membranes. The chelation-directed mineralized coating exhibits high polarity, superhydrophilicity, and ultralow adhesion to crude oil, enabling cyclable crude oil-in-water emulsion separation. The in-place flux recovery rate exceeded 99.9%, alleviating the need for traditional ex situ cleaning. The chelation-directed nanoarmored membrane exhibited 48-fold and 6.8-fold figures of merit for in-place self-cleaning regeneration compared to the control membrane and simple hydraulic cleaning, respectively. Precursor interaction mechanisms were identified by density functional theory calculations. Chelation-directed armorization offers promise for sustainable applications in catalysis, biomedicine, environmental remediation, and beyond.

Sponsoring Organization:
USDOE
OSTI ID:
2318606
Alternate ID(s):
OSTI ID: 2469531
OSTI ID: 2497271
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 11 Vol. 121; ISSN 0027-8424
Publisher:
Proceedings of the National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English

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