一步电沉积法制备超疏水Cu网及其耐腐蚀和油水分离性能
作者简介 康志新,男,1962年生,教授
收稿日期: 2017-05-24
网络出版日期: 2017-11-01
基金资助
广东省自然科学基金项目No.2015A030313219和广州市科技计划项目科学研究专项No.201510010155
Fabricating Superhydrophobic Copper Meshes by One-Step Electrodeposition Method and Its Anti-Corrosion and Oil-Water Separation Abilities
Received date: 2017-05-24
Online published: 2017-11-01
Supported by
Supported by Natural Science Foundation of Guangdong Province (No.2015A030313219) and Science and Technology Research Program of Guangzhou (No.201510010155)
用一步电沉积法在Cu网表面制得超疏水膜层,并用FE-SEM、接触角测量仪、EDS、FTIR和XPS表征膜层的形貌、浸润性和化学成分,研究工艺参数对膜层微观结构和浸润性的影响。结果表明,在30 V电压下反应10 min,得到的Cu网表面均匀覆盖着由纳米片聚集成的微米胞,成分为Cu[CH3(CH2)12COO]2,接触角达到最大值156.2°,滚动角低至1°。用动电位极化曲线和油水分离装置分析试样的耐腐蚀和油水分离性能,结果表明,超疏水膜层将基体的腐蚀电流密度从1.50×10-5 A/cm2减小到4.77×10-9 A/cm2,降低约3个数量级,腐蚀电压从-0.177 V提高到-0.141 V。油水分离实验表明,超疏水Cu网经5次循环利用后,油水分离效率仍在95%以上,显示出良好的油水分离能力和循环使用性能。
赵婷婷 , 康志新 , 马夏雨 . 一步电沉积法制备超疏水Cu网及其耐腐蚀和油水分离性能[J]. 金属学报, 2018 , 54(1) : 109 -117 . DOI: 10.11900/0412.1961.2017.00196
Special wettability includes superhydrophobic, superhydrophilic, superoleophobic and superoleophilic etc. The superhydrophobic surfaces are governed by the surface chemistry and unique micro/nanostructures. Up to now, numerous methods have been reported in constructing superhydrophobic surfaces including chemical vapor deposition, chemical etching, hydrothermal, sol-gel and so on. Preparing superhydrophobic films on metal surfaces is an effective way to improve the anti-corrosion property of metal substrates. In addition, superhydrophobic films can be used to oil-water separation. In this work, a one-step electrodeposition was applied to prepare superhydrophobic surfaces on copper meshes. The morphology, wettability and chemical composition of the prepared films were characterized by SEM, optical contact angle meter, EDS, FTIR and XPS. The results showed that the surface on copper meshes obtained at 30 V with 10 min was uniformly covered by microcells aggregated by nanosheets. The surfaces of the copper meshes were composed of copper myristate (Cu[CH3(CH2)12COO]2) and reach the maximum contact angle of 156.2° with the rolling angle as low as 1°. The potentiodynamic polarization curves were utilized to analyze the corrosion resistance, which demonstrated that corrosion current densities of the superhydrophobic film was 4.77×10-9 A/cm2, decreased by more than 3 orders of magnitude, and the corrosion potential was 0.036 V more positive compared with the copper substrate. Moreover,the oil-water separation tests showed that the separation efficiency of the film after reused for 5 times maintained above 95%, exhibiting excellent oil-water property and recycle capability.
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