Zhang Dongxing, Xiao Junfeng, Bai Yang, Guo Qiuquan, Zheng Mingyue, Liu Mei, Moorlag Carolyn, Yang Jun
Department of Mechanical and Materials Engineering, Faculty of Engineering, Western University, London, Ontario, Canada N6A 3K7.
Shanghai Key Laboratory of Intelligent Manufacturing and Robotics, School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200072, China.
ACS Appl Mater Interfaces. 2020 Oct 28;12(43):49073-49079. doi: 10.1021/acsami.0c13996. Epub 2020 Oct 2.
Delicate metal parts with superior electrical, mechanical, and thermal properties have attracted a lot of interest, but it is yet challenging to fabricate. Herein, a strategy of making complex metallic structures is developed in this research through integrating a bioinspired catechol-based initiator, dopamine, as an example, into the three-dimensional (3D) printing process followed by the assistance of surface modification. The wealthy catechol groups growing on the polymer enable the metal coating with a high adhesion stability. A series of complex metallic structures were fabricated, such as Ni-Co, Cu, and Ni Eiffel towers, Ag micro-stretching-dominated architecture, and Au auxetic structure. The introduced metal coating enables the 3D-printed objects with multiple classes of functionalities, such as magnetism or high conductivity. In particular, this method allows in situ repairing of the damaged metallic structures, which not only prolongs the lifespan of products but also solves the long-lasting challenge of repairing 3D printing parts. The detailed fabrication and repairing processes of functional metallic parts are presented and discussed. The proposed strategy has great potential in practical applications related to electronics, energy storage, healthcare, and so on.
具有优异电学、机械和热性能的精密金属部件引起了广泛关注，但制造起来仍具有挑战性。在此，本研究通过将一种受生物启发的基于儿茶酚的引发剂（以多巴胺为例）整合到三维（3D）打印过程中，并辅以表面改性，开发了一种制造复杂金属结构的策略。在聚合物上生长的丰富儿茶酚基团使金属涂层具有高附着力稳定性。制造了一系列复杂的金属结构，如镍钴、铜和镍埃菲尔铁塔、银微拉伸主导结构和金负泊松比结构。引入的金属涂层使3D打印物体具有多种功能，如磁性或高导电性。特别是，这种方法允许对受损金属结构进行原位修复，这不仅延长了产品的使用寿命，还解决了3D打印部件修复这一长期存在的挑战。文中介绍并讨论了功能性金属部件的详细制造和修复过程。所提出的策略在与电子、储能、医疗保健等相关的实际应用中具有巨大潜力。
