周嘉杰,胡弘毅,朱萍,曾志翔,王刚,朱丽静,凌志远.多源仿生柔性滑移涂层的制备及其减阻性能研究[J].表面技术,2024,53(23):153-158, 179.
ZHOU Jiajie,HU Hongyi,ZHU Ping,ZENG Zhixiang,WANG Gang,ZHU Lijing,LING Zhiyuan.Preparation and Study on Bionic Elastic Slippery Coatings[J].Surface Technology,2024,53(23):153-158, 179 |
| 多源仿生柔性滑移涂层的制备及其减阻性能研究 |
| Preparation and Study on Bionic Elastic Slippery Coatings |
| 投稿时间：2023-12-01 修订日期：2024-06-25 |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.23.013 |
| 中文关键词: 减阻 仿生涂层 滑移表面 超疏水表面 柔性材料 |
| 英文关键词:drag reduction biomimetic coating SLIPS superhydrophobic surface elastic materials |
| 基金项目:浙江省自然科学基金(LY21E030014) |
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| Author | Institution |
| ZHOU Jiajie | Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang Ningbo 315201, China |
| HU Hongyi | Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang Ningbo 315201, China |
| ZHU Ping | Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang Ningbo 315201, China |
| ZENG Zhixiang | Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang Ningbo 315201, China |
| WANG Gang | Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang Ningbo 315201, China |
| ZHU Lijing | Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang Ningbo 315201, China |
| LING Zhiyuan | COSCO Shipping Energy Transportation Co., Ltd., Shanghai 200080, China |
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| 中文摘要: |
| 目的 研究多源仿生技术构建高性能减阻涂层的方法。方法 在铝片上旋涂双组分硅胶，生成柔性涂层(模拟柔性的海豚皮肤)，然后喷涂疏水纳米二氧化硅粒子，得到柔性超疏水(SHS)涂层(同时模拟柔性的海豚皮肤和SHS荷叶)，再浇筑二甲基硅油，得到柔性滑移(SLIPS)涂层(同时模拟柔性的海豚皮肤和SLIPS特性的鲨鱼皮肤)。结果 低速时(200 r/min)，所有涂层均有减阻效果。柔性SLIPS涂层、柔性涂层和柔性SHS涂层的减阻率分别为23.2%、18.4%、10.2%。高速时(800~1 400 r/min)，柔性涂层和柔性SLIPS涂层的减阻率分别4.0%、5.6%，而柔性SHS涂层的减阻率为−15.0%，即减阻表面转化为增阻表面。结论 无论低速还是高速，柔性SLIPS涂层的减阻效果均优于柔性涂层和柔性SHS涂层。该研究对于降低海洋航行器航行时的摩擦阻力，提高其航速与航程具有极大的借鉴性。 |
| 英文摘要: |
| In nature, plenty of plants and animals have evolved special surfaces for drag reduction to thrive in harsh natural environments. The surfaces are usually classified into three categories, including superhydrophobic surfaces (SHSs) inspired by Lotus leaves, slippery liquid-infused porous surfaces (SLIPSs) inspired by the Nepenthes pitcher plant and shark skin, and elastic surfaces inspired by Delphinus delphis skin. For SHSs, air bubbles are trapped in the hierarchical microstructures covered by epicuticular wax forms, forming a continuous air layer repelling water with a water contact angle of more than 150°. Once water droplets contact the air layer, they can easily roll off the surfaces with a sliding angle lower than 10°. Therefore, the frictional drag caused by water is much smaller. However, water can be embedded into the hierarchical microstructures if the air layer is destroyed. Consequently, the friction drag of an air-liquid interface changes into a solid-liquid interface, possessing high friction drag. Different from SHSs, the air layer on SLIPSs is replaced by lubricants such as water and oils with low surface energy, leading to a new intermediate interface with low friction drag. But, the lubricants slowly escape the surfaces, as they should be replenished. An elastic surface can reduce drag by controlling the turbulent boundary layer. But it can be easily destroyed because of its poor mechanical strength. In the work, elastic and slippery surfaces with excellent friction drag reduction were developed inspired by SHS, SLIPS, and flexibility. Briefly, an elastic silica gel coating was coated on a clean Al plate via spinning, forming an elastic coating (simulating Delphinus delphis skin). Then hydrophobic SiO2 nanoparticles were sprayed on the elastic coating, forming an elastic SHS coating with hierarchical microstructures (simulating Delphinus delphis skin and lotus leaves). Lastly, dimethyl silicon oil inpoured the porous structures, forming an elastic SLIPS coating (simulating Delphinus delphis skin and shark skin). At 200 r/min, the rag reduction was 23.2%, 18.4% and 10.2% for the elastic SLIPS coating, the elastic coating, and the elastic SHS coating, respectively. At a high speed, the elastic coating and elastic SLIPS coating had a rag reduction of 4.0% and 5.6%, while the elastic SHS coating possessed a high friction drag (rag reduction of −15.0%). In the forward current direction, the coating transformed the liquid-solid surface into a liquid-liquid surface. The viscous dissipation and pinning effect of the external flow surface on the surface could be reduced. In addition, the velocity gradient was decreased and the deformation of the coating was weakened. In the radial direction, the coating decreased the pressure, reduced the turbulence, and increased the thickness of the boundary layer. Therefore, the drag reduction rate of the elastic SLIPS coating is higher than that of the elastic coating and the elastic SHS coating. It has great reference values for reducing the friction rag for marine vehicles. |
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