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Industry News

Melanin-Based Coating Offers Water Repellency

Laboratory and research.jpg
April 12, 2025

A research group from Chiba University in Japan developed a new coating that combines structural color with superhydrophobic properties using melanin-based particles. The technology provides vibrant color without traditional pigments and offers water repellency and self-cleaning performance, marking a potential advance in durable surface coatings.

The structural color effect is created through microscopic arrangements of melanin particles, mimicking natural examples such as peacock feathers. A surface modification process involving polydopamine and hydrophobic octadecyl groups enables high water repellency without the use of fluorinated compounds.

The coatings demonstrated contact angles over 160 degrees and maintained color integrity from multiple viewing angles. Researchers confirmed hydrophobicity using time-domain nuclear magnetic resonance (TD-NMR) and noted that application takes only minutes using simple dispersion in hexane.

The findings, published in Macromolecular Reaction Engineering, suggest applications for the coatings in outdoor surfaces, wallpaper, and other functional or decorative uses. Future research will focus on enhancing durability and adhesion to expand practical use cases.

Read more about this coverage here. 

Journal reference: DOI: 10.1002/mren.202400040

KEYWORDS: Research and Development water repellent coatings water repellents

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Ultra violet resistant of melanine based pigment

PRABIR DAS
April 13, 2025
I want to know more in details about oytdoor durability of melanine based coatings in auto body application.

Alberta Harrington
April 19, 2025
Developed in Japan, this melanin-based coating offers vivid colors without the use of pigment, while also attracting attention with its water-repellent property. Aesthetics and functionality are presented Decoupled at the same time.

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