Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 214122, Wuxi, Jiangsu, China.
International Research Center for Photoresponsive Molecules and Materials, Jiangnan University, 214122, Wuxi, Jiangsu, China.
Nat Commun. 2023 Apr 25;14(1):2381. doi: 10.1038/s41467-023-38082-8.
In the three-dimensional printing process of ceramic with low-angle structures, additional supporting structures are usually employed to avoid collapse of overhanging parts. However, the extra supporting structures not only affect printing efficiency, but the problems caused by their removal are also a matter of concern. Herein, we present a ceramic printing method, which can realize printing of unsupported multi-scale and large-span ceramics through the combination of direct ink writing and near-infrared induced up-conversion particles-assisted photopolymerization. This printing technology enables in-situ curing of multi-scale filaments with diameters ranging from 410 µm to 3.50 mm, and ceramic structures of torsion spring, three-dimensional bending and cantilever beam were successfully constructed through unsupported printing. This method will bring more innovation to the unsupported 3D manufacturing of complex shape ceramics.
在具有低角度结构的陶瓷三维打印过程中，通常采用附加支撑结构来避免悬空部分的塌陷。然而，额外的支撑结构不仅影响打印效率，而且去除它们所带来的问题也令人关注。在此，我们提出了一种陶瓷打印方法，通过直接墨水书写和近红外上转换粒子辅助光聚合的结合，可以实现无支撑多尺度和大跨度陶瓷的打印。该打印技术可以原位固化直径为 410μm 至 3.50mm 的多尺度纤维，并通过无支撑打印成功构建扭转弹簧、三维弯曲和悬臂梁等陶瓷结构。该方法将为复杂形状陶瓷的无支撑 3D 制造带来更多创新。
