董健,董鹤,龙芝剑,郭有海,叶森斌.微纳结构对硅基超疏水表面冷凝特性的影响[J].表面技术,2019,48(9):104-112.
DONG Jian,DONG He,LONG Zhi-jian,GUO You-hai,YE Sen-bin.Effect of Micro/Nano Structure on Condensation Characteristics of Hierarchical Superhydrophobic Silicon Surface[J].Surface Technology,2019,48(9):104-112 |
| 微纳结构对硅基超疏水表面冷凝特性的影响 |
| Effect of Micro/Nano Structure on Condensation Characteristics of Hierarchical Superhydrophobic Silicon Surface |
| 投稿时间：2019-01-17 修订日期：2019-09-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.09.010 |
| 中文关键词: 微纳二级结构 超疏水 硅表面 冷凝液滴 自迁移 集水效率 |
| 英文关键词:micro-nano hierarchical structure superhydrophobic silicon surface condensate droplets spontaneous migration water collection efficiency |
| 基金项目:国家自然科学基金项目（51875527, 51775507） |
|
|
| Author | Institution |
| DONG Jian | Zhejiang University of Technology, Hangzhou 310023, China |
| DONG He | Zhejiang University of Technology, Hangzhou 310023, China |
| LONG Zhi-jian | Zhejiang University of Technology, Hangzhou 310023, China |
| GUO You-hai | Zhejiang University of Technology, Hangzhou 310023, China |
| YE Sen-bin | Zhejiang University of Technology, Hangzhou 310023, China |
|
| 摘要点击次数: |
| 全文下载次数: |
| 中文摘要: |
| 目的 研究微米结构中心距对微纳二级结构超疏水硅表面热交换效率的影响。方法 首先采用湿法腐蚀在硅表面构建中心距分别为22、24、26、28、30 μm的微米四棱台结构，然后采用溶胶-凝胶法在表面涂覆疏水的纳米二氧化硅颗粒，获得微纳二级结构超疏水表面。通过表面接触角测量仪分析表面的湿润性，通过扫描电镜观察表面的微观形貌特征，使用光学显微镜观察冷凝小液滴自迁移现象，使用电子天平称量表面的冷凝集水质量。结果 当纳米结构相同时，随着微米结构中心距的增加，液滴静态接触角减小，冷凝小液滴的自迁移频率变慢，相同时间段内，平均集水效率下降。当相对湿度大于90%时，会出现表面“淹没”现象。微纳二级结构超疏水硅表面（微米结构间距22 μm）的集水效率是单独微米结构硅表面的1.38倍、单独纳米结构疏水表面的1.27倍、疏水硅光片表面的1.75倍、光二氧化硅亲水表面的3.6倍。结论 当纳米结构相同时，在一定范围内适当减小微米结构的中心距，有助于增强微纳二级结构超疏水硅表面热交换效率。 |
| 英文摘要: |
| The work aims to study the influence of microstructure center distance on heat transfer performance of micro- nano hierarchical superhydrophobic silicon surface. The wet etching was applied to construct micro-nano pyramid structures with center distance of 22, 24, 26, 28 and 30 μm on the silicon surface and then sol-gel method was used to coat hydrophobic nano silica particles to obtain micro-nano hierarchical superhydrophobic surface. The wettability and microtopography characteristics of the superhydrophobic silicon surface were analyzed by contact angle meter and scanning electron microscope. Spontaneous migration of small condensate droplets was observed by optical microscope. The electronic balance was used to measure the mass of the collected condensation water. For the same nanostructure, with the increase of microstructure center distance, the static contact angle of droplets became smaller, the spontaneous migration of small condensate droplets became slower and the average water collection efficiency decreased within the same period. Flooding was observed when relative humidity was larger than 90%. The water collection efficiency of the micro-nano structured hierarchical superhydrophobic silicon surface (22 μm micro-distance) was 1.38 times as large as that of the monolayer microstructure Si surface, 1.27 times as large as that of the monolayer nanostructure hydrophobic surface, 1.75 times as large as that of the hydrophobic smooth Si surface and 3.6 times as large as that of the hydrophilic smooth SiO2 surface. For the same nanostructure, reducing the microstructure spacing is helpful to enhance the surface heat exchange efficiency of hierarchical superhydrophobic silicon surface. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
渝公网安备 50010702501715号