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材料工程  2020, Vol. 48 Issue (1): 144-149    DOI: 10.11868/j.issn.1001-4381.2018.000010
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
电火花加工制备铜基微纳层次结构及其疏水性能
何照荣1,2, 揭晓华1, 连玮琦1
1. 广东工业大学 材料与能源学院, 广州 510036;
2. 广东石油化工学院 机电工程学院, 广东 茂名 525000
Fabrication of hierarchical micro/nano structure surface on copper by EDM and its hydrophobicity
HE Zhao-rong1,2, JIE Xiao-hua1, LIAN Wei-qi1
1. School of Materials and Energy, Guangdong University of Technology, Guangzhou 510036, China;
2. College of Mechanical and Electrical Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, Guangdong, China
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摘要 利用电火花成型加工技术制备铜基微纳层次结构疏水表面,该微纳层次结构主要由微纳孔洞、熔珠、重熔区和热应力裂纹等微观结构组成,考察了不同脉宽参数对微纳层次结构疏水性的影响。结果表明:随着脉宽的增大,微纳层次结构中微纳孔洞数量增加,各种微观结构的层次分布程度增强,增大"气垫"效应区域,可存储更多的空气在其表面,提高了微纳层次结构的疏水性。固-液界面所占面积分数(fsl)减小,水滴和表面孔洞中的"气垫"接触面积增大,使得微纳层次结构对水滴的物理吸附作用减弱。微纳层次结构接触角可增至(144.7±2.1)°,接触角滞后性范围为(8.46±3.3)°~(14.10±1.2)°。
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何照荣
揭晓华
连玮琦
关键词 电火花加工微纳层次结构疏水性接触角滞后    
Abstract:The hierarchical micro-nano structure surface on copper was fabricated by electrical discharge machining (EDM). The hydrophobic property was increased due to the hierarchical micro/nano structure (HMNS), which consisted of the micro/nano scale holes, molten balls, recast regions and the micro thermal cracks. The effects of the pulse width on the hydrophobicity of HMNS were investigated. The results indicate that with the increase of the pulse width, the quantity of the micro-nano scale holes increases. The distribution of other hierarchical micro structures is more homogeneous. The effective area of "air cushion" increases, which can trap more air in the HMNS. And the hydrophobicity of HMNS also increases. The proportion of the solid-liquid interface area (fsl) reduces. The contact area between the water droplet and "air cushion" in the HMNS increases. Therefore, the effect of the physical adsorption for the HMNS on the water droplet is weakened. The contact angles of the HMNSs can be increased up to (144.7±2.1)°, and the range of contact angle hysteresis is (8.46±3.3)°-(14.10±1.2)°.
Key wordselectrical discharge machining    hierarchical micro/nano structure(HMNS)    hydrophobicity    contact angle hysteresis
收稿日期: 2018-01-04      出版日期: 2020-01-09
中图分类号:  TB383  
基金资助: 
通讯作者: 揭晓华(1959-),男,教授,博士,主要从事耐磨涂层、液相脉冲放电和表面改性技术的研究工作,联系地址:广州市广东工业大学大学城校区工学3号馆406(510006),E-mail:cnxyyz3@gdut.edu.cn     E-mail: cnxyyz3@gdut.edu.cn
引用本文:   
何照荣, 揭晓华, 连玮琦. 电火花加工制备铜基微纳层次结构及其疏水性能[J]. 材料工程, 2020, 48(1): 144-149.
HE Zhao-rong, JIE Xiao-hua, LIAN Wei-qi. Fabrication of hierarchical micro/nano structure surface on copper by EDM and its hydrophobicity. Journal of Materials Engineering, 2020, 48(1): 144-149.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2018.000010      或      http://jme.biam.ac.cn/CN/Y2020/V48/I1/144
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