Ziaee Morteza, Johnson James W, Yourdkhani Mostafa
Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado 80523, United States.
School of Advanced Materials Discovery, Colorado State University, Fort Collins, Colorado 80523, United States.
ACS Appl Mater Interfaces. 2022 Apr 13;14(14):16694-16702. doi: 10.1021/acsami.2c02076. Epub 2022 Mar 30.
3D printing of fiber-reinforced thermoset composites is desirable for rapid fabrication of 3D composite objects with minimal tooling. One of the main issues in 3D printing of thermoset composites is the low cure rates of matrix resins, which prevents rapid curing and rigidization of composite materials during the printing process and capturing the desired print geometry. Here, we demonstrate a new technique for printing and curing of carbon-fiber-reinforced thermoset composites without any postcuring or postprocessing steps. Upon extrusion and deposition of the composite ink from a printing nozzle, the ink is cured via frontal polymerization, leading to rapid printing of high-quality composites. Tailoring the processing conditions allows for freeform or rapid, supported printing of 3D composite objects with zero void content and highly oriented carbon fiber reinforcements.
纤维增强热固性复合材料的3D打印对于快速制造具有最少工具的3D复合物体是很理想的。热固性复合材料3D打印的主要问题之一是基体树脂的固化速率低，这会阻止复合材料在打印过程中快速固化和硬化，并难以获得所需的打印几何形状。在此，我们展示了一种用于打印和固化碳纤维增强热固性复合材料的新技术，无需任何后固化或后处理步骤。当复合油墨从打印喷嘴挤出并沉积时，油墨通过前沿聚合进行固化，从而实现高质量复合材料的快速打印。调整加工条件可实现3D复合物体的自由形式或快速、有支撑的打印，其孔隙率为零，碳纤维增强材料高度取向。
