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Maximizing the grafting of zwitterions onto the surface of ultrafiltration membranes to improve antifouling properties

Journal Article · · Journal of Membrane Science
 [1];  [2];  [2];  [3];  [2];  [2]
  1. State Univ. of New York (SUNY), Buffalo, NY (United States); University at Buffalo, SUNY
  2. State Univ. of New York (SUNY), Buffalo, NY (United States)
  3. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
Superhydrophilic zwitterions have been extensively exploited for surface modification to improve antifouling properties. However, it remains challenging to form layers of <20 nm with high zwitterion content on the surfaces with different degrees of hydrophilicity. We demonstrate that amine-functionalized sulfobetaine (SBAm) can be co-deposited with dopamine on ultrafiltration (UF) membranes, leading to a thickness of 10 nm to 50 nm and an SBAm content of up to 31 mass% in the coating layers. The covalently grafted SBAm is stable underwater and improves the antifouling properties, as evidenced by the lower trans-membrane pressure required to retain targeted water fluxes than that required for the pristine membranes. Finally, the SBAm is also more effective than conventionally used sulfobetaine methacrylate (SBMA) for the zwitterion grafting on the surface to improve antifouling properties
Research Organization:
Helios-NRG LLC, East Amherst, NY (United States)
Sponsoring Organization:
USDOE; USDOE Office of Fossil Energy (FE), Clean Coal and Carbon Management
Grant/Contract Number:
SC0017077
OSTI ID:
1601454
Alternate ID(s):
OSTI ID: 1779570
Journal Information:
Journal of Membrane Science, Journal Name: Journal of Membrane Science Journal Issue: C Vol. 601; ISSN 0376-7388
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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