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电弧喷涂Zn-Al合金与硅氧烷自组装制备超疏水涂层
李龙阳, 李玉新, 曾志翔, 刘二勇, 乌学东, 孙小东1,2
1. 中北大学 材料科学与工程学院, 太原 030051;2. 中国科学院宁波材料技术与工程研究所a.中国科学院海洋新材料与应用技术重点实验室b.浙江省海洋材料与防护技术重点实验室, 浙江 宁波 315201
摘要:
采用电弧喷涂技术在Q235钢板上制备了ZnAl合金涂层,利用硅氧烷对其表面改性,得到具有超疏水特性的ZnAl涂层。利用场发射扫描电子显微镜(FESEM)、激光共聚焦蔡司光学仪、表面接触角仪(OCA20)、傅里叶变换红外光谱仪(FTIR)和X射线光电子能谱(XPS)研究了涂层表面形貌、疏水性能以及涂层材料与硅氧烷的结合机理。结果表明:当喷涂电压固定时,涂层表面的粗糙度随着送丝速度的增加先增大后减小;当送丝速度固定时,涂层表面的粗糙度随着电压的增大呈相同变化趋势。接触角随着ZnAl涂层粗糙度的增加而增大,当粗糙度为12.457 μm时接触角可增至151.06°,滚动角小于10°。自组装硅氧烷与涂层结合处理后表明结合机理是由硅氧烷水解后的羟基与基体的羟基通过脱水缩合而“生长”在ZnAl涂层表面。
关键词:  电弧喷涂  自组装  粗糙度  硅氧烷  超疏水
DOI:10.11933/j.issn.1007-9289.2014.06.005
分类号:
基金项目:
Preparation of Superhydrophobic Zn-Al Alloy Coating and Selfassembled Siloxane by Arc Spraying
LI Longyang, LI Yuxin, ZENG Zhixiang, LIU Eryong, WU Xuedong, SUN Xiaodong1,2
1. College of Material Science and Engineering, North University of China, Taiyuan 030051;2a. Key Laboratory of Marine Materials and Related Technologies, 2b. Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, Zhejiang
Abstract:
Superhydrophobic ZnAl alloy coating with a rough surface were prepared by arc spraying technology and selfassembly by siloxane. The microstructure and bonding mechanism of ZnAl alloy coating was characterized by field emission scanning electron microscope (FESEM), laser confocal Zeiss optics instrument, Fourier transform infrared spectrometer (FTIR) and Xray photoelectron spectroscopy (XPS). The superhydrophobic characteristics were tested by surface contact angle meter (OCA20). Results show that the roughness of ZnAl coating first increases and then decreases with the increase of the wire feed speed at a fixed spray voltage. Meanwhile, the roughness of ZnAl coating shows the same trends with the increase of the spray voltage at a fixed wire feed speed. The contact angle of ZnAl coating after selfassembled by siloxane increases with the roughness. The contact angle is 151.06° and the roll angle is less than 10° when the roughness is up to 12.457 μm. After selfassembled by siloxane, the dehydration condensation of the hydroxyl of silicone and ZnAl coating is the main bonding mechanism of ZnAl coating and silicone.
Key words:  arc spraying  selfassembly  roughness  siloxane  superhydrophobic