简易快速的表面超疏水涂层制备及其性能  

Simple and Rapid Fabrication and Properties of Superhydrophobic Coatings on the Surface

作　　者：夏天 何秀权 章桥新[1] 余金桂[1] 车勇[1] 刘蓉[1] XIA Tian;HE Xiu-quan;ZHANG Qiao-xin;YU Jin-gui;CHE Yong;LIU Rong(School of Mechanical and Electronic Engineering,Wuhan University of Technology,Wuhan 430070,China;Institute of Laser and Intelligent Manufacturing,South-Central University for Nationalities,Wuhan 430074,China)

机构地区：[1]武汉理工大学机电工程学院,武汉430070 [2]中南民族大学激光与智能制造研究院,武汉430074

出　　处：《表面技术》2022年第10期328-335,共8页Surface Technology

基　　金：国家自然科学基金(51210008)。

摘　　要：目的低成本简易快速地制备出耐腐蚀超疏水涂层,并研究表面喷砂对超疏水涂层的影响。方法利用喷砂和抛光这2种表面处理方式和喷涂工艺在5050铝合金板基体表面构建出具有多级结构的超疏水表面。通过润湿性、电化学腐蚀、耐磨性、浸泡耐久性和自清洁测试等试验,分别评价制备样品表面的润湿性、耐海水腐蚀、耐磨性、耐长时间浸泡性能和自清洁性能,并通过扫描电子显微镜和能谱仪对表面形貌和元素成分进行分析。结果制备的样品表面具有优异的超疏水性能。在30次喷涂次数下,喷砂基底的涂层表面的水滴静态接触角为(153.9±1)°,动态滚动角为(2.99±0.5)°。电化学腐蚀测试结果表明,喷涂氟硅树脂/SiO_(2)涂层可以有效增强铝合金表面的耐腐蚀性能。试验中,样品在25次砂纸摩擦后,抛光基底的涂层表面的接触角为(97±1)°,喷砂基底的涂层表面的接触角为(102.4±1)°。样品在NaCl溶液浸泡10 d后,抛光基底的涂层表面的接触角为(69.4±1)°,喷砂基底的涂层表面的接触角为(113.7±1)°。结论所制备的喷砂和抛光基体在经过不同次数的喷涂氟硅树脂/SiO_(2)复合涂料后具备超疏水性能,且喷砂基底的涂层表面具有更低的滚动角。涂层修饰的表面在NaCl溶液中的耐腐蚀性能随着喷涂次数的提升而增强。在相同的喷涂条件下,喷砂处理基体能提高超疏水表面的耐腐蚀性、耐磨性和耐久性。The current state of the superhydrophobic surfaces fabrication has the disadvantage of high cost and complicated process.We manufacture a superhydrophobic surface by SiO_(2) particles and fluorosilicone resinto.They are mixed to prepare the coating and sprayed on the surface of 5050 aluminum alloy,and cured at 250℃to obtain the superhydrophobic surface.Sandblasting can impact the surface of the sample to create microstructure which can improve the superhydrophobicity of the surface while enhancing the surface performance and set up a variety of tests to study the impact of the sandblasted surface.This process is low cost and simple.5050 aluminum alloy as base materials and smooth them by sandpaper,half of the surface base was covered,then the surface was sandblasted under 0.5 MPa pressure,the sandblasting time was 10 s,to obtain a base with half of the sandblasted surface and half of the polished surface.The substrate was cleaned,dried and then sprayed.The step test was carried out by controlling the number of spraying times from 5 to 30.Dry the sprayed sample at 80℃and put it into the muffle furnace cure at 250℃.Through wettability test,electrochemical corrosion test,abrasion resistance test,long term immersion resistance test and self-cleaning test,we evaluated the wettability,seawater corrosion resistance,abrasion resistance,and long term immersion resistance of the sample surface.The surface topography and elementary composition were analyzed by SEM and EDS.After controlling the number of sprays,the surface had super-hydrophobic properties.The contact angle of droplets on the sandblasted surface under 30 spraying times was(153.9±1)°,and the rolling angle was(2.99±0.5)°.The electrochemical corrosion test showed that spraying fluorosilicone resin/SiO_(2) coating can improved the corrosion resistance of the 5050 surface.It was found in SEM that SiO_(2) particles can form lotus-like sub-micron protrusions on the surface of the substrate.The lowest corrosion current was 0.22μA/cm^(2),and the highest cor

关 键 词：简易制备 超疏水 氟硅树脂 SIO2 喷砂 电化学腐蚀 

分 类 号：TB34[一般工业技术—材料科学与工程]