摘要： 通过KH-560改性光催化纳米TiO₂与3-KH-550改性微米SiO₂的偶合反应制备草莓型微球,用氟硅烷改性微球表面,再将其与羟基氟硅油、甲基三丁酮肟基硅烷共混制得超疏水涂料,将其涂覆于基材表面室温固化制得超疏水涂层。利用扫描电镜和光学接触角测量仪对涂层形貌和润湿性进行了表征,并对涂层表面耐久性和自补偿性进行了测试。结果表明:当颜基比为4.5∶5.5时,涂层表面的水接触角可以达到165°,同时草莓型微球表面粗糙度可显著提高涂层的超疏水性;此外该涂层具有优异的耐油污性和耐酸碱性,更为重要的是,由于氟碳链段的自补偿性可以使受损涂层恢复超疏水性。

关键词: 草莓型微球, 超疏水涂层, 耐久性, 自补偿性

Abstract: The strawberry micro-spheres were prepared via the coupling reaction of 2, 3epoxypropoxy propyltrimethoxysilicane(kh-560 )modified Tio nanoparticles and 3-amin-opropyltriethoxysilane(kh-550) modified Sio, microparticles. Then they were mixed with fluorosilicones, methyltris(methylethylketoxime)silane to obtain superhydrophobic coatings. This coating could be coated on various substrates to form the superhydrophobic surfaces. The suface morphology and hydrophobicity of the coating were characterized by scanning electron microscope and contact angle measurement, and the durability and self-replenishing ability of the coating were also tested. The experimental results showed that when the pigment/binder ratio was 4.5: 5. 5, the water contact angle of coating could reach 165, and the roughness of strawberry micro-spheres enhanced the hydrophobicity of the coatings. Additionally, the coating had excellent resistance to oil, acid and alkali. Most importantly, the damaged coatings could recover their superhydrophobicity due to the self-replenishing ability of the flu-oxocarbon chains.

Key words: strawberry microspheres, superhydrophobic coating, durability;self-re-plenishing