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One‐step fabrication of wear‐resistant superhydrophobic coating based on aminosilane‐functionalized diatomaceous earth
Author(s) -
Sun Xiaoying,
Liu Jing,
Zhang Zhihui,
Zhi Yuanyuan,
Jin Lujiang,
Hang Jianzhong,
Shi Liyi
Publication year - 2021
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.51227
Subject(s) - sandpaper , materials science , coating , fabrication , composite material , abrasion (mechanical) , composite number , superhydrophobic coating , polyurethane , medicine , alternative medicine , pathology
Facile fabrication of superhydrophobic coatings with excellent mechanical robustness is highly desired in practical application. Herein, a convenient and effective strategy for one‐step fabrication of robust volumetric superhydrophobic coating was developed containing aminosilane‐functionalized cylindrical diatomaceous earth (DE) particles and a polyurethane (PU) resin. Due to the strong chemical cross‐linking between the amino groups and the isocyanates, the superhydrophobic DE particles were strongly anchored to the PU resin, thus improving the wear resistance of the coating. The coating could withstand 20 m sandpaper abrasion under a constant pressure of 2.6 kPa. The wear resistance of the coating improved nearly 471% compared with the superhydrophobic DE/PU composite coating prepared by physical‐blending. Moreover, the coating also demonstrated great self‐cleaning performance, excellent chemical stability and underwater durability. Additionally, the as‐prepared coating could be easily applied to various substrates and exhibited high rigidity (3H‐4H), good adhesion (4B‐5B), and great flexibility (impact resistance of 1 Kg·m).