A mechanically robust, self-cleaning, highly abrasion-resistant superhydrophobic composite coating, method and applications thereof

By preparing a double-layer quartz sand/F-TiO2/SiO2@EP superhydrophobic composite coating, the problem of easy damage to superhydrophobic coatings under mechanical friction or wear was solved, and stable self-cleaning performance was achieved in complex environments, making it suitable for outdoor applications.

CN121471783BActive Publication Date: 2026-06-09QILU UNIVERSITY OF TECHNOLOGY (SHANDONG ACADEMY OF SCIENCES)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
QILU UNIVERSITY OF TECHNOLOGY (SHANDONG ACADEMY OF SCIENCES)
Filing Date
2025-12-18
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing superhydrophobic coatings are easily damaged by mechanical friction or wear, resulting in a decrease in hydrophobicity and making it difficult to achieve stable self-cleaning performance in large-scale industrial applications.

Method used

A double-layer quartz sand/F-TiO2/SiO2@EP superhydrophobic composite coating was prepared by using epoxy resin, modified F-TiO2 nanoparticles and SiO2 nanoparticles through a simple scraping-spraying process. The mechanical stability and self-cleaning properties of the coating were enhanced by combining multi-scale hierarchical structure design and low surface energy modification.

Benefits of technology

In the Taber abrasion test, the coating maintained good hydrophobicity after 3,000 abrasion cycles under a 250 g load and 600 abrasion cycles under a 750 g load. After 500 tape peels, the static water contact angle was still greater than 120° and the roll-off angle was as low as 5°, demonstrating excellent abrasion resistance and substrate adhesion.

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Abstract

This invention belongs to the field of new materials, specifically relating to a mechanically robust, self-cleaning, highly wear-resistant, and superhydrophobic composite coating, its method, and its applications. Using epoxy resin (E51) as a binder, this invention combines quartz sand, modified F-TiO₂ nanoparticles, and SiO₂ nanoparticles to prepare a two-layer quartz sand / F-TiO₂ / SiO₂@EP superhydrophobic composite coating through a simple scraping-spraying process. This coating, through multi-scale hierarchical structural design and low surface energy modification, achieves a static water contact angle of 151° and a roll-off angle of <5°, exhibiting excellent self-cleaning performance against liquid and solid contaminants. Mechanical stability tests show that the coating maintains good hydrophobicity after 3000 cycles of wear under a 250 g load and 600 cycles of wear under a 750 g load in the Taber abrasion test; after 500 tape peel tests, the static water contact angle is still greater than 120° and the roll-off angle is as low as 5°, demonstrating excellent abrasion resistance and substrate adhesion.
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