An F-SiO2 Janus microsphere and a superhydrophobic coating based thereon

By grafting hydrophobic segments onto the surface of SiO2 nanospheres and crosslinking them with hydroxyl acrylic resin, the problem of poor durability of superhydrophobic coatings was solved, and the wear resistance and long-term waterproof performance were improved.

CN119368110BActive Publication Date: 2026-06-19SHAANXI UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHAANXI UNIV OF SCI & TECH
Filing Date
2024-11-30
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing superhydrophobic coatings have poor durability, mainly due to insufficient adhesion between the coating and the substrate and unstable internal structure of the coating, which affects their performance maintenance in external environments.

Method used

F-SiO2 Janus microspheres were used, and hydrophobic segments were grafted onto the surface of SiO2 nanospheres through mercaptoalkene click chemistry. These segments were then chemically crosslinked with hydroxyl acrylic resin to form a stable crosslinked network structure, thereby enhancing the overall structural stability of the coating.

Benefits of technology

It significantly improves the durability and abrasion resistance of the superhydrophobic coating, while maintaining long-term waterproof and anti-fouling properties.

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Abstract

This invention discloses F-SiO2 Janus microspheres and a superhydrophobic coating based thereon. The preparation method of the F-SiO2 Janus microspheres involves adding SiO2 nanospheres and hexadecyltrimethylammonium bromide to a two-phase solvent of water and toluene, adjusting the pH of the system to 7-8, and then adding mercaptopropyltrimethoxysilane to react and obtain mercaptopropyltrimethoxysilane-modified SiO2 nanospheres. A catalyst, 1H,1H,2H,2H-perfluorodecyl acrylate, and the mercaptopropyltrimethoxysilane-modified SiO2 nanospheres are added to acetone, ultrasonically dispersed, and then reacted under ultraviolet light in an ice bath environment to obtain the F-SiO2 Janus microspheres. The F-SiO2 Janus microspheres prepared by this invention, when added to resin as a filler, form a coating with excellent superhydrophobic properties.
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