Abstract
A facile, precise, and controllable manufacturing technology is desired for hierarchical functional surfaces. In this work, we successfully manufactured porous metallic glass using a water-dissolution material as template and the excellent thermoplastic property of metallic glass. The prepared micro/nanostructures have excellent tunability, and the proposed approach can be used to prepare large-area disordered porous structures and ordered regular arrays with nanoscale replication accuracy. In particular, the disordered porous structure prepared by the dissolvable template strategy exhibits a water contact angle of ∼140° and an oil contact angle of ∼0°, making it suitable for oil/water separation. It also shows stable wettability after being soaked in strong acid or alkali environments and maintains a ∼130° water contact angle and a ∼4° oil contact angle even after severe wear. The proposed strategy also possesses excellent recycling properties. We reconstructed porous structures on the same surface three times and found no significant change in wettability for each reconstructed porous structure. Our research provides a facile and controllable approach for the preparation of hierarchical porous structures and paves the way for the design of other functional surfaces.
摘要
简单、精密、可控的制造技术在功能表面中具有广阔的应用前景. 在这项工作中, 我们通过使用食盐这种水溶性材料作为模板, 利用金属玻璃优异的热塑成型性能, 成功地实现了多孔金属玻璃的溶解制造. 通过这种溶解制造方法制备的微/纳米结构具有良好的可调控性, 不仅可以制备大面积多孔结构, 还可以制备具有纳米级复制精度的有序规则阵列. 其中, 通过可溶性模板策略制备的无序多孔结构具有约140°的水滴接触角和接**于0°的油滴接触角, 可用于油水分离, 并且在**酸和**碱的环境中浸泡后表现出稳定的润湿性. 即使在严重磨损后, 带有多孔结构的表面仍可保持约130°的水滴接触角和约4°的油滴接触角. 此外, 该策略显示出优异的可重复使用性能. 通过在同一个金属玻璃表面上重构三次多孔结构, 发现每次重构的多孔结构的润湿性没有显著变化. 本文的研究成果为制备多级孔结构及功能表面提供了一种简便可控的方法.
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Acknowledgements
This work was supported by the Key Basic and Applied Research Program of Guangdong Province, China (2019B030302010), the National Natural Science Foundation of China (52122105, 51871157, and 51971150), and the National Key Research and Development Program of China (2018YFA0703604). The authors also thank the assistance on microscope observation received from the Electron Microscope Center of Shenzhen University.
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Fu J and Ma J conceived the idea. Ma J, Li Z, Ruan W, Ren S, Zhang Z and Liang X supervised the work. Fu J and Liu Z carried out the experiments, and Li Z, Li X, and Sun F designed the experimental setup. Wen W performed the XRD and DSC. Huang J prepared the raw material. Fu J and Li L performed the TEM. Fu J and Ma J wrote the manuscript. All authors contributed to the discussion and analyzed the results.
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The authors declare that they have no conflict of interest.
Jianan Fu received his BSc degree from Jiangxi Agricultural University in 2019 and Master degree in mechanical engineering from Shenzhen University in 2022. He will pursue a PhD degree at the Southern University of Science and Technology. His research includes the formation of micro/nano-structure via the thermoplastic forming process and the application of metallic glasses.
Jiang Ma received his BSc degree in materials science and engineering from the Southeast University in 2009 and PhD degree from the Institute of Physics, Chinese Academy of Sciences (CAS), Bei**g, China, in 2014, honored with the Outstanding PhD student Award (Top 1%) and the Institute Director Award (Top 5%). He is currently a professor at the College of Mechatronics and Control Engineering, Shenzhen University, China, and received the Outstanding Teacher Award of Shenzhen, in 2018. His research includes the formation, functional application and high frequency dynamic loading behavior of metallic glasses.
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Fu, J., Li, Z., Liu, Z. et al. Manufacture of porous metallic glass using dissolvable templates. Sci. China Mater. 65, 2833–2841 (2022). https://doi.org/10.1007/s40843-022-2191-9
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DOI: https://doi.org/10.1007/s40843-022-2191-9