| 引用本文: | 弯艳玲,奚传文,董宾,于化东.微纳复合沟槽形铝合金表面的结冰性能[J].中国表面工程,2018,31(4):81~87 |
| WAN Yan-ling,XI Chuan-wen,DONG Bin,YU Hua-dong.Icing Performance of Micro-nano Composite Grooves on Aluminum Alloy Surface[J].China Surface Engineering,2018,31(4):81~87 |
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| 摘要: |
| 为开发具有抗结冰性能的稳定性铝合金功能表面，采用高速电火花线切割加工技术（Wire cut electrical discharge machining，WEDM）在铝合金表面加工出沟槽形复合微结构，对其润湿性和结冰性能进行测试，并对机理进行分析。结果表明，铝合金表面构建的微纳复合微结构形成了“气垫”效应，减少了液滴与基底的接触面积，增加了液滴在材料表面的表观接触角。测试环境的温度和湿度由于分别改变了材料表面液滴的表面张力和液滴体积，从而改变了材料表面的润湿性。材料表面的润湿性对抗冰效果有重要影响，超疏水表面表现出优异的抗结冰性能，疏水表面次之。抗结冰机理分析发现，沟槽内微结构“捕获”的气体，减小了液滴与固体表面的实际接触面积，加大了液滴重心与冷表面间的距离，增大了形成冰核的热力学势垒，延长了结冰时间，使微结构表面具备一定的抗结冰效果。 |
| 关键词: 疏水 复合微纳结构 抗结冰 沟槽 |
| DOI：10.11933/j.issn.1007-9289.20180417002 |
| 分类号:TG48 |
| 基金项目:国家自然科学基金（51705033）；吉林省科技发展计划项目（20180101324JC）；长春理工大学机电工程学院露泉创新基金 |
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| Icing Performance of Micro-nano Composite Grooves on Aluminum Alloy Surface |
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WAN Yan-ling, XI Chuan-wen, DONG Bin, YU Hua-dong
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College of Mechanical and Electric Engineering, Changchun University of Science and Technology, Changchun 130022
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| Abstract: |
| In order to develop a stable aluminum alloy functional surface with anti-icing performance, a grooved composite microstructure was fabricated on the surface of aluminum alloy by high-speed wire cut electrical discharge machining (WEDM) and its wettability and icing performance were tested. The mechanism was simultaneously analyzed. The results show that microstructure on the surface of aluminum alloy form "air cushion" effect, reducing the contact area between the droplet and the substrate and increasing the apparent contact angle of the droplet on the surface of the material. The temperature and humidity of the test environment change the wettability of the material surface by changing the surface tension and droplet volume of the droplet on the material surface, respectively. The wettability of the material surface has an important effect on the ice effect, and the superhydrophobic surface exhibits excellent anti-icing properties, followed by the hydrophobic surface. Analysis of anti-icing mechanism shows that the gas trapped by the microstructure in the groove reduces the actual contact area between the droplet and the solid surface, and increases the distance between the droplet center of gravity and the cold surface. It also increases the thermodynamic barrier of ice nucleation and prolongs the freezing time. Thus, the surface of the microstructure has a certain anti-icing effect. |
| Key words: hydrophobic composite micro-structure anti-icing groove |
