基于纳米TiO2添加的新型航空涂料性能研究

目的解决纳米TiO_2在涂料中的团聚问题,同时实现增强涂层防腐蚀、疏水性能和耐紫外老化性能。方法以氯醚树脂为航空涂料的主要成膜物质,以经氟硅烷改性后的金红石型纳米TiO_2颗粒为主要吸光剂和疏水剂,配合其他合适填料和颜料制备一种新型航空涂料,通过拉拔法、硬度测试法、电化学极化曲线法、接触角测试法和人工紫外加速老化等测试手段分别对涂层的力学性能、电化学性能、疏水性能和耐紫外老化性能进行研究。结果改性后的金红石型纳米TiO_2颗粒的分散性及与氯醚树脂的相容性得到改善。当添加量为2%~3%时,涂层腐蚀防护性能、表面疏水性、耐紫外老化性能达到最佳,附着力、硬度等力学性能达到航空涂料的基本使用要求。结论该涂料有效地解决了纳米TiO_2在涂料中的团聚问题,提高了涂层的防腐蚀、疏水性能和耐紫外老化性能。

Properties of New Aerospace Coatings Based on TiO2 Nanoparticles Added

Objective To solve conglobation of nanometer TiO2 in coating and improve anti-corrosion, hydrophobicity and ultraviolet aging resistance of coating. Methods Chlorine ether resin was taken as the main film-forming material of aerospace coatings, rutile TiO2 nanoparticles modified by fluoroalkyl silane was taken as the primary light absorber and water repellent to produce a new aerospace coating in combination with other fillers and pigments. The mechanical property, electrochemistry property, hydrophobicity and ultraviolet aging resistance of coating were researched respectively through methods such as drawing, hardness testing, electrochemical polarization curve, contact angle measurement and artificial UV accelerated aging testing, etc. Results The dispersity of modified rutile TiO2 nanoparticles and its compatibility with chlorine ether resin were improved. The corrosion prevention, surface hydrophobicity and ultraviolet aging resistance of coating was the best, and mechanical properties such as adhesive force, rigidity, etc. also met basic using requirements on aerospace coating when the volume of addition was 2%-3%. Conclusion The coating solves the conglobation of nanometer TiO2 in coating and improves anti-corrosion, hydrophobicity and ultraviolet aging resistance of coating.