| LU Zhi-cheng,ZHENG Jia-yi,YU Yan-shun.Research Progress of Droplet Guided Motion on Wetting Surface[J],50(1):138-149 |
| Research Progress of Droplet Guided Motion on Wetting Surface |
| Received:June 30, 2020 Revised:October 13, 2020 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2021.01.011 |
| KeyWord:droplet wetting surface guided motion superhydrophobic dynamics research progress |
| Author | Institution |
| LU Zhi-cheng |
MIIT Key Laboratory of Electronic Equipment, School of Energy and Power Engineering, Nanjing University of Science & Technology, Nanjing , China |
| ZHENG Jia-yi |
MIIT Key Laboratory of Electronic Equipment, School of Energy and Power Engineering, Nanjing University of Science & Technology, Nanjing , China |
| YU Yan-shun |
MIIT Key Laboratory of Electronic Equipment, School of Energy and Power Engineering, Nanjing University of Science & Technology, Nanjing , China |
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| Abstract: |
| The droplet manipulation technology on wetting surfaces has attracted much attention because of its wide application in the fields of microfluidic system design, biomedical analysis, fresh water collection, ink-jet printing and heat exchanger. The basic theories of liquid-solid contact and droplet movement were mainly introduced. The research progress of droplet guided transport technology on wetting surfaces by scholars at home and abroad in recent years was reviewed. According to the different driving forces involved in different wetting surfaces, three kinds of droplet guided motions were summed up, which were driven by the surface gradient on the surface with wettability gradient, by the gravity on the anisotropic track surface of superhydrophobic substrate, and by the external field on the superhydrophobic surface. The development of droplet driven by wettability gradient from theoretical analysis to experiment realization, the preparation method and experimental research of superhydrophobic surface with anisotropic track were emphatically described, as well as the different transport mechanisms of droplet driven in response to light, electricity, heat and magnetic fields. The advantages and disadvantages of all kinds of droplet transport technologies were analyzed and compared. Finally, the research on the dynamic properties of centrifugal force and surface tension in the process of droplet curve motion on wetting surface was proposed. The important direction of controlling the multiple droplets for independent guided motion by combining the multiple external fields with the optimization design of solid surface was expected, and future application was briefly introduced. |
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