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Updated: Apr 19, 2026
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Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
Published on: April 7, 2017
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Unbalanced Zwitterionic Polyelectrolyte Coatings Enable Reversible Electrostatic Protein Adsorption for Superior
Huiyun Wang1, Rong Wang1, Chongling Cheng2
1State Key Laboratory for Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 130012 Changchun, P. R. China.
Langmuir : the ACS Journal of Surfaces and Colloids
|April 17, 2026
Summary
Researchers discovered reversible electrostatic protein adsorption on specialized coatings. This breakthrough offers a new, environmentally friendly method for high-performance surface protection against biofouling.
Area of Science:
- Materials Science
- Surface Chemistry
- Biotechnology
Background:
- Protein adsorption on surfaces is typically irreversible, causing persistent biofouling.
- Existing antifouling coatings often rely on hydration and have limitations.
Purpose of the Study:
- To investigate the reversibility of electrostatic protein adsorption.
- To develop advanced antifouling coatings with tunable properties.
Main Methods:
- Fabrication of unbalanced zwitterionic polyelectrolyte (UZIPE) coatings using poly(diallyldimethylammonium chloride) (PDDA) and poly(acrylic acid) (PAA) bilayers.
- Tuning the anionic-to-cationic moiety ratio to a specific range (0.32-0.53).
- Assessing protein adsorption, conformation preservation, and release using saline rinses.
Main Results:
- UZIPE coatings with a specific ratio enabled reversible electrostatic protein adsorption.
- Adsorbed proteins maintained native conformation, and fibrinogen was fully released.
- These coatings suppressed microbial colonization and biofilm development for extended periods in marine and freshwater environments.
Conclusions:
- Reversible electrostatic protein adsorption is a novel antifouling mechanism.
- UZIPE coatings offer a scalable and environmentally benign solution for surface protection.
- This approach outperforms conventional antifouling strategies.
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