摘要
以坡缕石粉为功能颜料,环氧树脂 E-44 和杜仲胶混合物为成膜物质,在涂有环氧/杜仲胶清漆的表面制备了一层具有类水黾脚部"凹凸沟壑"结构的仿生超疏水涂层.对涂层进行了SEM、FTIR、XRD表征,对C3涂层(坡缕石粉质量分数为 25%)进行了水接触角、水滚动角、自清洁性能、抗润湿性能、耐磨性能、耐水性能测试.结果表明,C3涂层表面具有明显的"凹凸沟壑"结构,其静态、动态水接触角分别为153.1°、152.6°,水滚动角为 8.8°,具有优异的自清洁性能;C3 涂层对泥土浆液、甲基橙溶液和亚甲基蓝溶液具有优良的抗润湿性,接触角均>150°;C3涂层具有良好的基材适用性,涂覆于混凝土、织物棉布、纸张及塑料表面均具有超疏水性能;经过载重为100 g的A4纸循环打磨50次,C3涂层水接触角仍高达151.9°,具有较好的耐磨性能;C3涂层在经过18和24 h浸泡后,其水接触角分别为152.2°和144.4°.
Abstract
A bionic superhydrophobic coating with"concave and convex gully"structure,which is like foot of water strider,was developed on the epoxy/gutta-percha varnish surface using palygorskite powder as functional pigment and mixture of epoxy resin E-44 and gutta-percha as film-forming material,and characterized by SEM,FTIR,XRD.The C3 coating,prepared with 25%(mass fraction)of palygorskite powder was then evaluated for its water contact angle,water rolling angle,self-cleaning capacity,wettability,wear resistance and water resistance.The results showed that the C3 coating displayed obvious"concave and convex gully"structure,with the average static and dynamic water contact angle of 153.1° and 152.6°,respectively,the water rolling angle of 8.8°,and excellent self-cleaning performance.Meanwhile,the C3 coating showed excellent wettability resistance to mud slurry,methyl orange solution and methylene blue solution,with all contact angles above 150°.Moreover,the C3 coating exhibited good substrate applicability,and super hydrophobic properties on the surface of concrete,fabric,paper and plastic.After 50 times of cyclic polishing with 100 g A4 paper,the coating still retained a water contact angle as high as 151.9°,showing good wear resistance.After soaked for 18 and 24 h,the C3 coating displayed water contact angle of 152.2° and 144.4°,respectively.
基金项目
国家级重点大学生创新训练项目(202210531001)
湖南省自然科学基金青年项目(2023JJ40516)
教育厅青年项目(22B0551)
湖南省创新省份建设专项(2020SK2028)
NETL
NSTL
万方数据