Roles of chemistry modification for laser textured metal alloys to achieve extreme surface wetting behaviors
Roles of chemistry modification for laser textured metal alloys to achieve extreme surface wetting behaviors
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DOI：
10.1016/j.matdes.2020.108744
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发表时间：
2020-07-01
影响因子：
8.4
通讯作者：
Ding, Hongtao
中科院分区：
文献类型：
--
作者：
Samanta, Avik;Wang, Qinghua;Ding, Hongtao
结构金属表面的润湿行为因其在商业、工业和军事领域的广泛应用以及基础研究兴趣而备受关注。由于其适应性、精确度和易于自动化，基于激光的毛化技术是在金属衬底上创建微结构和纳米结构的理想平台，包括激光诱导的周期性表面结构或分层结构。然而，仅靠微米和纳米结构往往不能达到所需的润湿性。必须进行后续的表面化学修饰，以获得激光纹理金属基板的目标极端润湿性。本文旨在系统地了解在激光表面工程方法中形成的表面化学修饰和物理表面结构之间的相互依赖关系。提出了表面化学在表面结构上的作用，以决定最终的润湿方案。具体地说，通过控制激光纹理表面的表面化学，润湿可以从极端疏水性调制到亲水性，从而允许自由地实现复杂的多重润湿情况。在每一节中，我们强调实现表面结构和表面化学的适当组合的最有成效的方法和潜在的机制。讨论了在腐蚀性和磨损性环境中处理表面的耐久性和稳定性。最后，对这一迅速发展的领域当前研究面临的挑战和未来的研究方向进行了展望。这一综述将为激光毛化方法的设计和金属合金极端润湿表面的制造提供全面的指导。(C)2020作者。爱思唯尔有限公司出版。
Wetting behaviors of structured metal surfaces have received considerable attention due to the wide range of applications for commercial, industrial, and military uses as well as fundamental research interests. Due to its adaptability, precision, and ease of automation, laser-based texturing techniques are desirable platforms to create micro- and nano-structures, including laser-induced periodic surface structures, or hierarchical structures on a metal substrate. However, micro- and nanostructures alone often do not achieve the desired wettability. A subsequent surface chemistry modification method must be performed to attain target extreme wettability for laser textured metal substrates. This review aims to provide a systematic understanding of the interdependence of surface chemistry modification and physical surface structures formed during the laser-based surface engineering methods. The role of surface chemistry on top of the surface structures is presented to decide the final wetting scenario. Specifically, by controlling the surface chemistry of a laser textured surface, wetting can be modulated from extreme hydrophobicity to hydrophilicity, allowing freedom to achieve complex multi-wettability situations. In each section, we highlight the most fruitful approaches and underlying mechanisms to achieve a fitting combination of surface structures and surface chemistry. Durability and stability of the treated surface are also discussed in corrosive and abrasive environments. Finally, challenges in current studies and prospects in future research directions of this rapidly developing field are also discussed. This review will provide a comprehensive guideline for the design of laser texturing methods and the fabrication of extreme wetting surfaces for metal alloys. (C) 2020 The Authors. Published by Elsevier Ltd.