摘要： 利用溶剂挥发法制备包裹氟硅烷(FAS13)的微胶囊,并将其与FAS13改性的气相二氧化硅、具有光催化活性的二氧化钛(P25)及有机硅树脂乳液通过简单共混制备得到水性超疏水涂料,将其涂覆于基材表面并经过UV光照即得超疏水涂层。通过扫描电镜和透射电镜观察微胶囊的形貌,并对涂层进行耐老化测试。考察颜基比、P25用量及微胶囊用量对涂层超疏水性能的影响。结果表明:颜基比为4.5∶5.5、P25含量为5%、微胶囊含量为20%~25%时,基于此配方制备的涂层表面水接触角可达到160°以上,加速老化试验360 h后,涂层表面依然保持超疏水性,同时该超疏水涂层具有良好的耐酸碱性。

关键词: 微胶囊, 水性, 超疏水, 涂料, 耐老化, 耐酸碱

Abstract: The waterborne superhydrophobic coatings were prepared by FAS-loaded micro-capsules, FAS modified SiO₂, nanoparticles, P25 and silicone resin emulsion. Superhydrophobic surfaces were formed by casting the coatings on the substrates under Uv-irradiation. SEM and TEM were used to investigate the microcapsules morphology and the durability performance of the coating was measured. The relationship between the pigment/binder ratio, the content of P25. the content of microcapsules and the superhydrophobicity of the coating was investigated.When the pigment/binder ratio was 4. 5: 5.5, the content of P25 was 5% and the content of the microcapsule was 20%~25%, the water contact angle of coating could reach 160°.and the coating could also maintain superhydrophobic after 360 h accelerated weathering test. Furthermore, this waterborne superhydrophobic coating had good acid and alkali resistance.

Key words: microcapsules, waterborne, superhydrophobic, coating, ageing resistance, acid-alkali resistance