Scalable multi-material additive manufacturing of bioinspired polymeric material with metallic structures via electrically assisted stereolithography
Scalable multi-material additive manufacturing of bioinspired polymeric material with metallic structures via electrically assisted stereolithography
复制标题
通过电辅助立体光刻技术对具有金属结构的仿生聚合物材料进行可扩展的多材料增材制造
DOI：
10.1115/1.4055793
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Li, Xiangjia
中科院分区：
文献类型：
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作者：
Tang, Tengteng;Ahire, Bhushan;Li, Xiangjia
由金属结构和聚合物基体组成的异质材料系统对于集成电路、微机电设备、天线、传感器、执行器和超材料等应用具有重要意义。生活在深海的鳞足蜗牛由于由金属和聚合物制成的独特外壳而具有高强度和耐高温性。最近，已经使用多种制造工艺通过金属沉积来制造不同的多材料结构。然而，使用这些复杂的混合工艺构建具有增强性能、高分辨率和时间效率的复杂异质材料三维 (3D) 结构具有挑战性。在这里，我们建立了一种新颖的制造策略，使用电辅助立体光刻技术利用异质材料系统构建仿生分层结构。开发了可作为电荷转移电解质的光固化印刷溶液，并进一步研究了印刷溶液的固化特性。通过基于物理的多尺度建模和模拟，研究了对聚合物基体上金属结构形成机制的基本了解。确定了金属结构形态、打印溶液特性和打印工艺参数之间的相关性，及其在使用异质材料构建仿生分层结构中的影响。构建了示范性测试用例来验证所提出方法的打印性能。这项研究工作将提供一种可扩展的增材制造（AM）工艺，可以促进基于仿生异质材料和结构的各种有趣的应用。
Heterogeneous material systems consisting of metallic structures and polymer matrixes are of significance for applications such as integrated circuits, microelectromechanical devices, antennas, sensors, actuators, and metamaterials. Scaly-foot snail which lives in the deep ocean exhibits high strength and temperature resistance due to unique shells made of metal and polymer. Recently, different multi-material structures have been fabricated with metal deposition using multiple manufacturing processes. However, using these complicated hybrid processes is challenging to construct complexthree-dimensional (3D) structures of heterogeneous material with enhanced properties, high resolution, and time efficiency. Here, we establish a novel manufacturing strategy to build bioinspired hierarchical structures with heterogeneous material systems using electrically assisted stereolithography. The photocurable printing solution that can act as an electrolyte for charge transfer was developed, and the curing characteristic of the printing solution was further investigated. A fundamental understanding of the formation mechanism of metallic structures on the polymer matrix was studied through physics-based multi-scale modeling and simulations. The correlation between metallic structures morphology, printing solution properties, and printing process parameters, and their effects in building bioinspired hierarchical structures with heterogeneous materials were identified. Demonstrative test cases were built to verify the printing performance of the proposed approach. This research work will deliver a scalable additive manufacturing (AM) process that can facilitate various interesting applications based on bioinspired heterogeneous material and structures.