| 摘要: |
| 硬度高、寿命长、适用范围广的金属基自清洁表面的制备是国内外研究的热点和难点。以镍为金属基体，纳米三氧化钨（WO3）作为功能性材料，采用复合电沉积法在金属基底上制备出超亲水或超疏水可选择的镍-纳米三氧化钨自清洁镀层。使用SEM、S-neox 三维光学轮廓仪、EDS、接触角测量仪等测量其表面形貌特征、力学性能、表面润湿性及光催化性能。结果表明：WO3质量分数为17%时的镍-纳米三氧化钨复合镀层表面呈现典型的微纳米分级结构特征和超亲水润湿特性，并具有光催化降解甲基橙溶液能力；经氟化处理，复合镀层由超亲水转变为超疏水，接触角高达156.5°；经电化学刻蚀-氟化处理，复合镀层的疏水能力更强，光催化性更好；制备的复合镀层具备超亲水或超疏水特性，具有硬度高、与金属基体结合力大、光催化降解有机物等更加优异的自清洁性能。 |
| 关键词: 电沉积 超亲水 超疏水 镍-纳米三氧化钨复合镀层 光催化性能 |
| DOI：10.11933/j.issn.1007-9289.20180527001 |
| 分类号:TG174.441;O647.5 |
| 基金项目:国家自然科学基金（51475149）；河南省高校科技创新团队支持计划（15IRTSTHN013） |
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| Preparation and Characteristic Analysis of Superhydrophilic/superhydrophobic Ni/nano-WO3 Composites |
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BI Xiangyang, MING Pingmei, SHEN Jiwen, ZHAO Ximei
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Institute of Non-traditional Machining and Equipment, Henan Polytechnic University, Jiaozuo 454000, China
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| Abstract: |
| The preparation of metal-based self-cleaning surface with high hardness, long service life and wide application is a hot and difficult topic in research at home and abroad. A super-hydrophilic or superhydrophobic selectable Ni/nano-WO3 self-cleaning composite coating was prepared on the metal substrate with nickel as the matrix metal and nanometer tungsten trioxide (WO3) as the functional material by composited electrodeposition. Surface morphology, mechanical properties, surface wettability and photocatalytic properties of the coating were tested by SEM, S-neox 3D optical profiler, EDS and contact angle measurement, respectively. The results show that the surface of the Ni/nano-WO3 composite with 17% WO3 has the morphological feature with micro/nano dual-scale hierarchical structures and superhydrophilic properties, and the ability to photocatalytically degrade of methyl orange solution. It changes to superhydrophobic when it is coated by a layer of fluorination with a contact angle of 156.5°. The electrodeposited composite has a significantly improved anti-wettability and photocatalytic property when it is post-treated by electrochemical etching and fluorination. The as-prepared composite coating has super-hydrophilic or superhydrophobic pron bhh perties, and superior self-cleaning properties such as high hardness, large binding force to metal matrix, and photocatalytic degradation of organic matter. |
| Key words: electrodeposition superhydrophilic superhydrophobic Ni/nano-WO3 composite coating photocatalytic performance |
