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Updated: Mar 14, 2026
Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
Published on: April 7, 2017
PEG-mimetic peptoid reduces protein fouling of polysulfone hollow fibers
Neda Mahmoudi1, Lauren Reed1, Alex Moix1
1Ralph E. Martin Department of Chemical Engineering, University of Arkansas, United States.
Abstract:
Biofouling is a persistent problem for membranes exposed to blood or other complex biological fluids, affecting surface structure and hindering performance. In this study, a peptoid with 2-methoxyethyl (NMEG5) side chains was immobilized on polysulfone hollow fiber membranes to prevent protein fouling. The successful attachment of NMEG5 to the polysulfone surface was confirmed by X-ray photoelectron spectroscopy and an increase in hydrophilicity was confirmed by contact angle analysis. The NMEG5-modified surface was found to resist fouling with bovine serum albumin, lysozyme, and adsorbed significantly less fibrinogen as compared with other published low-fouling surfaces. Due to the low fouling nature and increased biocompatibility of the NMEG5 coated membranes, they have potential applicability in numerous biomedical applications including artificial lungs and hemodialysis.
Insights
This study immobilized a peptoid (NMEG5) on membranes to prevent biofouling from biological fluids. The modified membranes showed reduced protein adsorption and enhanced biocompatibility for biomedical uses.
Area of Science:
- Biomaterials Science
- Surface Chemistry
- Membrane Technology
Background:
- Biofouling of membranes in contact with biological fluids is a significant challenge.
- Fouling compromises membrane performance and surface integrity in biomedical applications.
Purpose of the Study:
- To develop a novel anti-biofouling surface for polysulfone hollow fiber membranes.
- To immobilize a peptoid with 2-methoxyethyl (NMEG5) side chains to prevent protein fouling.
Main Methods:
- Immobilization of NMEG5 peptoid onto polysulfone hollow fiber membranes.
- Surface characterization using X-ray photoelectron spectroscopy (XPS).
- Hydrophilicity assessment via contact angle analysis.
- Protein adsorption studies using bovine serum albumin, lysozyme, and fibrinogen.
Main Results:
- Successful covalent attachment of NMEG5 to the polysulfone surface was confirmed.
- Increased surface hydrophilicity was observed after NMEG5 modification.
- NMEG5-coated membranes exhibited significantly reduced adsorption of model proteins compared to unmodified surfaces and other low-fouling surfaces.
Conclusions:
- NMEG5-modified polysulfone membranes demonstrate excellent resistance to protein fouling.
- The enhanced biocompatibility and low-fouling properties suggest potential for NMEG5-coated membranes in artificial lungs and hemodialysis.
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