电气石/有机硅复合低表面能涂层的防污减阻性能

Antifouling and Drag Reduction Properties of Tourmaline/Silicone Composite Coatings with Low Surface Energy

有机硅低表面能船舶防污涂料无毒安全,具有良好的表面污损物脱除性能,但是存在着防污性不足的问题。为了提高其防污性能,选择了5种电气石粉,以替代涂料中常用的钛白粉和氧化锌,制备了电气石/有机硅复合低表面能涂层;测试了电气石粉体和涂层的负离子释放率,用激光共聚焦扫描显微镜测试分析了复合涂层的表面形貌与粗糙度;测量了复合涂层与水和二碘甲烷的接触角,利用二液法估算了涂层的表面自由能;在黄海海域旅顺港进行了涂层实海挂板浸泡试验;在实验室采用旋转圆盘法测量了涂层的海水阻力。结果表明:应用电气石粉能明显提高有机硅涂层的防污性能,电气石/有机硅复合低表面能涂层的负离子释放率越高,其防污性能越好。

Tourmaline/silicone composite coatings with low surface energy were prepared with five tourmaline powders which replaced titanium dioxide and zinc oxide commonly used in paint industry.The negative ion release rates of tourmaline powders and coatings were measured,and the surface topography and roughness of the composite coatings were investigated by confocal laser scanning microscopy.Surface free energy of composite coatings was estimated by using Owen's two-liquid method based on the measurement of water and diiodomethane contact angles.Furthermore,panels were tested by immersion in Lvshun port of the Yellow Sea,and drag resistance of coatings was measured by rotation disk method in laboratory.Results showed that antifouling performance of silicone coatings was significantly improved by using tourmaline,and the higher the negative ions release rate of tourmaline coating was,the better the antifouling performance of composite coating was.