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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。
Aim To solve the problem of agglomeration of nano-TiO_2 in coatings and to improve the anti-corrosion, hydrophobic and UV-resistant properties of the coatings. Methods Chloroether resin was used as the main film-forming material for aeronautical coating. A new type of aeronautic coating was prepared by using rutile-modified nano-TiO 2 particles modified by fluorosilane as the main light-absorbing agent and hydrophobic agent, and other suitable fillers and pigments. The mechanical properties, the electrochemical properties, the hydrophobic properties and the UV aging resistance of the coatings were investigated by the tensile test, tensile test, hardness test, electrochemical polarization curve, contact angle test and artificial UV accelerated aging test. Results The dispersibility of the modified rutile nano-TiO 2 particles and the compatibility with the chlorinated ether resin were improved. When the additive amount is 2% ~ 3%, the corrosion protection performance, surface hydrophobicity and UV aging resistance of the coating are best. The mechanical properties such as adhesion, hardness and so on meet the basic requirements of aviation coatings. Conclusion The coating effectively solves the nano-TiO 2 agglomeration in the coating and improves the anti-corrosion, hydrophobic properties and UV aging resistance of the coating.