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Mussel-Inspired Universal Anti-Fogging Coating Based on Maleic Anhydride Copolymers with Customizable Structural
Kaihui Pan1, Zexin Zhang1, Yang Liu1
1The State Key Laboratory of Chemical Resource Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|October 23, 2025
Summary
A novel coating synthesized from poly(ethylene-alt-maleic anhydride) demonstrates exceptional antifogging and antibacterial properties. This versatile coating maintains performance after rigorous testing and shows broad applicability on various transparent surfaces.
Area of Science:
- Materials Science
- Polymer Chemistry
- Surface Engineering
Background:
- Developing advanced coatings with multiple functionalities is crucial for various applications.
- Existing antifogging coatings often lack durability or broad substrate compatibility.
- Antibacterial properties are increasingly desired in surface treatments.
Purpose of the Study:
- To synthesize and characterize a novel coating based on poly(ethylene-alt-maleic anhydride) (PEMA).
- To evaluate the antifogging performance, stability, universality, and antibacterial activity of the synthesized coating.
- To investigate the effect of quaternization on the coating's properties.
Main Methods:
- Synthesis of PEMA-g-DA/DMAPA via amidation reaction using dopamine (DA) and N,N-dimethylaminopropylamine (DMAPA).
- Assessment of antifogging properties through water contact angle (WCA) measurements.
- Evaluation of coating stability via immersion and cycling tests.
- Testing of antibacterial activity against Staphylococcus aureus after quaternization.
Main Results:
- The PEMA-DA-DMAPA coating achieved a low WCA of 10.7°, indicating excellent hydrophilicity and antifogging capability.
- The coating demonstrated significant reduction in the coefficient of friction.
- Excellent antifogging performance was maintained after 5 days of immersion and 60 cycling tests.
- The coating showed wide applicability on transparent substrates like PMMA, PET, and PC, reducing WCA on PC from 89.5° to 11.9°.
- Quaternized coating exhibited significant antibacterial activity against S. aureus, with a maximum rate of 97.23%.
Conclusions:
- The synthesized PEMA-based coating offers superior antifogging properties and enhanced stability.
- The coating exhibits broad substrate compatibility for transparent materials.
- Quaternization imparts significant antibacterial efficacy, making the coating multifunctional.
- This PEMA-g-DA/DMAPA coating presents a promising solution for advanced surface treatments.
