耐腐蚀耐热超疏水TiO_2复合涂层制备与性能研究

Preparation and research of superhydrophobic composite coating contained TiO_2 with corrosion and heat resistance

铝基板表面的超疏水特性将赋予其优异的性能。利用环氧树脂(E44)和改性聚偏氟乙烯(PVDF)的作用,以改性纳米级二氧化钛(TiO_2)和全氟乙烯丙烯共聚物(FEP)疏水低表面能物质为主要填料用简单易行的喷涂工艺制备出功能超疏水涂层。实验结果表明,制得的超疏水涂层,对水的静态接触角和滚动角分别为151°和5°;采用扫描电镜(SEM)表征了涂层表面有纳微二元复合微观结构;用差示扫描量热法(DSC)表征表明,该涂层在160℃下有优良的耐热性能;用不同pH值溶液进行浸没腐蚀以及电化学测其耐腐蚀性,腐蚀时间为180h时接触角仍有130°左右,具备强疏水效果。这种超疏水涂层为腐蚀耐热材料领域的研究提供了新的视野。

The aluminum plate possessing superhydrophobic surface can exhibit excellent performance. It focus on prepare functional superhydrophobic coating through a simple spraying process by using epoxy resin （E44） and modified polyvinylidene fluoride （PVDF） reaction as basal material,modified nano TiOz as the main filler and hydrophobic and low surface energy materials of fluorinated ethylene propylene （FEP）. The water contact angle and the slide angle of coating were 151° and 5°, respectively. There were nano/micro composite rough structures on coating surface showed by SEM. Through DSC,it showed that the coating had a good resistance on heat under the temperature of 160℃. It still was about 130°and remained favourable hydrophobic effect when used a mixture of sulfuric acid （pH ： 1） and sodium hydroxide （pH= 14） to test its corrosion resistance,and the corrosion time was about 180h. A simple and effective method was provided for generating non-wetting materials insights to design novel materials for many other applications.