| LIU Hongwei,ZOU Qinrui,YANG Yi,SONG Yuegan,XU Yuanchong,LI Guoqiang.One-step Preparation and Anti-icing Performance of Superhydrophobic Surface[J],53(16):190-197 |
| One-step Preparation and Anti-icing Performance of Superhydrophobic Surface |
| Received:September 10, 2023 Revised:January 10, 2024 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2024.16.016 |
| KeyWord:copper superhydrophobic anti-icing low adhesion self-cleaning electric deicing |
| Author | Institution |
| LIU Hongwei |
School of Information Engineering,Sichuan Mianyang , China |
| ZOU Qinrui |
School of Manufacturing Science and Engineering, Southwest University of Science and Technology, Sichuan Mianyang , China |
| YANG Yi |
School of Manufacturing Science and Engineering, Southwest University of Science and Technology, Sichuan Mianyang , China |
| SONG Yuegan |
School of Manufacturing Science and Engineering, Southwest University of Science and Technology, Sichuan Mianyang , China |
| XU Yuanchong |
School of Manufacturing Science and Engineering, Southwest University of Science and Technology, Sichuan Mianyang , China |
| LI Guoqiang |
School of Manufacturing Science and Engineering, Southwest University of Science and Technology, Sichuan Mianyang , China |
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| Abstract: |
| Ice on the surface of industrial equipment and building materials has brought many troubles to the normal production and life of people, such as wind turbine blades freeze, electrical wiring freeze and airplane wing freeze. The traditional active deicing strategies, such as mechanical deicing, photothermal deicing and chemical deicing, have a series of problems such as high energy consumption and easy environmental pollution. A large number of studies have shown that the superhydrophobic surface can reduce the contact area between materials and water droplets, so that water droplets are not easy to gather on the surface, and have the characteristics of extending the icing time and reducing the ice adhesion. However, the existing research has some problems such as cumbersome preparation process and unfriendly environment. The work aims to find a simple, efficient and green preparation method to improve the anti-deicing performance of the material surface. Copper mesh and polytetrafluoroethylene (PTFE) were fixed together with nano-tape, and PTFE nanoparticles were partially embedded on the surface of the copper mesh by femtosecond laser direct writing technology. The super hydrophobic surface of PTFE attached to copper mesh was prepared by one-step method. Different microstructures were processed on the PTFE surface by controlling femtosecond processing power, including xanthium (SC), flocculent (CL) and long columnar (SP) structures. The microstructures were analyzed by scanning electron microscope and optical microscope. Under the combined action of low surface energy of PTFE and roughness of copper mesh, the surface of PTFE attached copper mesh exhibited excellent superhydrophobic properties, and the contact angle of water reached 152° and the rolling angle was 4°. On this basis, the effects of microstructure on surface wettability and anti-icing properties were investigated. The results showed that the superhydrophobic surface of PTFE attached to copper mesh could not only reduce the contact area of the droplet, effectively prolong the freezing time of the droplet, but also greatly reduce the ice adhesion after freezing. The icing time was 1.2 times longer than that of unpadded PTFE copper mesh. During the cooling process, the droplets changed from Cassie state to Wenzel state, and the superhydrophobic surface of PTFE attached to the copper mesh could maintain the Cassie state for a long time to maintain the stability of the droplets. It still maintained a low adhesion after icing, and the minimum ice adhesion could be as small as 2.55 kPa, which was nearly 40 times smaller than the ordinary superhydrophobic surface. At the same time, it could realize efficient and rapid self-removal of condensate droplets, and also show excellent self-cleaning performance. The superhydrophobic surface of PTFE attached to copper mesh can effectively extend the icing time, reduce the ice adhesion force, and has excellent condensation self-removal and self-cleaning performance. The superhydrophobic surface of PTFE attached to copper mesh has an important application prospect in the field of anti-icing. This study provides a new idea and research method for anti-icing of overhead transmission lines, and is expected to promote the application of this method in the field of anti-icing. At a voltage of 5.01 V, the surface of the copper mesh can effectively prevent the formation of ice. |
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