A novel 3D printing strategy for continuous glass fiber reinforced polylactic acid (CGF/PLA) composites was proposed. CGF/PLA filament was prepared by a melting impregnation device, and then CGF/PLA filament was directly supplied to the self-modified 3D printing device. The impregnation process was optimized systematically, and the fiber content reached up to 45 wt%. A specific compatibilizer was used and the amount of compatibilizer was optimized to enhance the interfacial bonding between fiber and polymer. The effects of printing parameters such as nozzle diameter, edge width, layer thickness, printing speed and temperature on the mechanical properties and microstructure of the final printed products were studied. The flexural strength and flexural modulus of the printed products reached 312 MPa and 21.5 GPa, respectively. The fabrication strategies proposed in this study can provide a low-cost and high-strength method for the industrial application of 3D printed continuous fiber reinforced thermoplastic composites.

提出了一种连续玻璃纤维增​​强聚乳酸（CGF / PLA）复合材料的新型3D打印策略。通过熔融浸渍装置制备CGF / PLA细丝，然后将CGF / PLA细丝直接提供给自改性3D打印装置。系统地优化了浸渍工艺，纤维含量达到了45 wt％。使用了特定的增容剂，优化了增容剂的用量以增强纤维与聚合物之间的界面结合力。研究了诸如喷嘴直径，边缘宽度，层厚度，印刷速度和温度等印刷参数对最终印刷产品的机械性能和微观结构的影响。印刷产品的弯曲强度和弯曲模量分别达到312 MPa和21.5 GPa。