Zhang Manyu, Tian Xiaoyong, Li Dichen
State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
Polymers (Basel). 2021 Sep 18;13(18):3176. doi: 10.3390/polym13183176.
To fully exploit the preponderance of three-dimensional (3D)-printed, continuous, fiber-reinforced, thermoplastic composites (CFRTPCs) and self-reinforced composites (which exhibit excellent interfacial affinity and are fully recyclable), an approach in which continuous fiber self-reinforced composites (CFSRCs) can be fabricated by 3D printing is proposed. The influence of 3D-printing temperature on the mechanical performance of 3D-printed CFSRCs based on homogeneous, continuous, ultra-high-molecular-weight polyethylene (UHMWPE) fibers and high-density polyethylene (HDPE) filament, utilized as a reinforcing phase and matrix, respectively, was studied. Experimental results showed a qualitative relationship between the printing temperature and the mechanical properties. The ultimate tensile strength, as well as Young's modulus, were 300.2 MPa and 8.2 GPa, respectively. Furthermore, transcrystallization that occurred in the process of 3D printing resulted in an interface between fibers and the matrix. Finally, the recyclability of 3D-printed CFSRCs has also been demonstrated in this research for potential applications of green composites.
为了充分利用三维（3D）打印的连续纤维增强热塑性复合材料（CFRTPC）和自增强复合材料（具有优异的界面亲和力且可完全回收）的优势，本文提出了一种通过3D打印制造连续纤维自增强复合材料（CFSRC）的方法。研究了3D打印温度对以均匀、连续的超高分子量聚乙烯（UHMWPE）纤维和高密度聚乙烯（HDPE）长丝分别作为增强相和基体的3D打印CFSRC力学性能的影响。实验结果表明了打印温度与力学性能之间的定性关系。极限拉伸强度和杨氏模量分别为300.2MPa和8.2GPa。此外，3D打印过程中发生的异相成核导致了纤维与基体之间的界面。最后，本研究还证明了3D打印CFSRC的可回收性，以用于绿色复合材料的潜在应用。
