Tunable Superhydrophobicity from 3D Hierarchically Nano-Wrinkled Micro-Pyramidal Architectures |
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| Authors: | Weixin Zhang Jie Gao Yujun Deng Linfa Peng Peiyun Yi Xinmin Lai Zhongqin Lin |
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| Affiliation: | 1. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, 200240 P. R. China;2. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, 200240 P. R. China Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures, Shanghai Jiao Tong University, Shanghai, 200240 P. R. China |
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| Abstract: | Interfacial surfaces with hierarchical structures have triggered intense research interest and been used in a broad range of applications ranging from anti-icing, anti-fogging, surface-enhanced Raman spectroscopy to catalytic reaction. However, the high-cost manufacturing processes and the limited durability remain as great challenges that need to be addressed, especially for superhydrophobicity. In this work, a novel hybrid approach for stretchable, transparent, and robust superhydrophobic surfaces is proposed, constructing micro-pyramid architectures with tunable hierarchical wrinkles efficiently and in an environmentally friendly manner. Due to the multiscale structures, excellent superhydrophobicity is obtained with contact angle of ≈172° and sliding angle ≈5° in a steady “Lotus” state. Further, the wear resistance and stability tests also suggest a superior performance under simulated severe real-world applications. Utilizing such multiscale synergistic co-operation effects can be an excellent manufacturing strategy and be extended to other surface engineering where hierarchical architectures are needed. |
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| Keywords: | 3D wrinkled surfaces hierarchical structures micro-arrays plasma-assisted superhydrophobicity |
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