| LIU Yahua,SONG Wenzhuo,LI Wenzong,ZHAN Haiyang,WANG Shixu,XIAO Bingzhong,WEI Quanmao,ZHANG Keke,LU Chenguang.Anti/de-icing Performance and Stability of Durable Photothermal Superhydrophobic Coatings[J],54(2):191-201 |
| Anti/de-icing Performance and Stability of Durable Photothermal Superhydrophobic Coatings |
| Received:March 17, 2024 Revised:July 03, 2024 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2025.02.016 |
| KeyWord:superhydrophobic coating photothermal de-icing/frosting anti-icing wear resistance polysilazane multi- walled carbon nanotubes |
| Author | Institution |
| LIU Yahua |
Dalian University of Technology, Liaoning Dalian , China |
| SONG Wenzhuo |
Dalian University of Technology, Liaoning Dalian , China |
| LI Wenzong |
Dalian University of Technology, Liaoning Dalian , China |
| ZHAN Haiyang |
Dalian University of Technology, Liaoning Dalian , China |
| WANG Shixu |
Dalian University of Technology, Liaoning Dalian , China |
| XIAO Bingzhong |
Dalian University of Technology, Liaoning Dalian , China |
| WEI Quanmao |
Dalian University of Technology, Liaoning Dalian , China |
| ZHANG Keke |
Dalian University of Technology, Liaoning Dalian , China |
| LU Chenguang |
Dalian University of Technology, Liaoning Dalian , China |
|
| Hits: |
| Download times: |
| Abstract: |
| Icing and frosting are universal phenomena in low temperature environments, often causing safety hazards to infrastructure such as power and transportation and resulting in huge direct or indirect property losses. Superhydrophobic surfaces based on the lotus leaf effect have been extensively studied in recent decades as potential anti-icing materials. However, the anti-icing performance of superhydrophobic surfaces collapses due to the filling of the surface microstructure with condensate microdroplets in low temperature and high humidity environments. Moreover, the interlocking between ice and surface microstructure damages the surface easily during de-icing, which will further reduce its service life. Therefore, it is necessary to explore energy-saving de-icing/defrosting strategies without destroying the functionality of superhydrophobic surfaces, as well as improving the mechanical stability of superhydrophobic surfaces to promote long-lasting anti-icing applications. Here, the work aims to propose a superhydrophobic photothermal coating with excellent anti-icing performance and durability. The formulation of the coating was optimized by considering the wettability, photothermal ability and substrate adhesion. Polysilazane (PSZ) and epoxy resin (EP) were used as film-forming materials, and hydrophobic nano-SiO2 particles and multi-walled carbon nanotubes (MWCNT) were mixed in to prepare a photothermal superhydrophobic coating by spraying. The wettability of the coating surface was characterized with a contact angle meter. The de-icing/frosting performance of the coating was tested through photothermal de-icing/frosting experiments, and the anti-icing and anti-frosting performance of the coating was tested through static anti-icing/frosting experiments, low temperature surface droplet impact experiments, etc. The mechanical stability of the coating was measured through linear friction experiments, tape peeling experiments and thermal weight loss experiments. The results showed that the contact angle of the coating surface was (156±2)° and the rolling angle was (7±1)°, indicating excellent superhydrophobicity. In the photothermal de-icing experiment, the frozen water droplet on the surface fell off after only 43 s of simulated sunlight (1 kW/m2) exposure and the ice layer covering the surface completely fell off the surface after 12 min of exposure to sunlight. In the photothermal defrosting experiment, the fully covered surface frost completely melted after 2 min of sunlight exposure. In static anti-icing experiments, the freezing time of droplets on the coated surface was delayed six times compared to the bare aluminum surface. In the low temperature impact experiment at −10 ℃, the droplet was pinned and quickly frozen after contacting the supercooled bare aluminum surface. However, the droplets completely bounced off and detached from the surface after impacting the coating surface. In anti-frosting experiments, the coated surface was able to significantly delay frost formation and reduce its coverage. In addition, linear friction experiments and tape peeling experiments showed that the coating had good wear resistance and solid substrate adhesion. Thermogravimetric analysis and high temperature heating experiments showed that polysilazane gave the coating good thermal stability, allowing the coating to maintain superhydrophobicity after baking at 300 ℃ for 1 h. In summary, the durable superhydrophobic photothermal coating prepared in this work has excellent photothermal anti/de-icing performance and mechanical stability. The coating still exhibits excellent anti-icing and photothermal conversion capabilities after experiencing friction and wear. This provides a promising solution for energy-saving, environmentally friendly and durable anti-icing applications. |
| Close |
|
|
|