ATBC对3D打印用PLA/PCL线材的制备与性能的影响研究

Influence of addition of ATBC on the preparation and properties of PLA/PCL filaments for FDM 3D printing

以乙酰柠檬酸三丁酯(ATBC)为相容剂,通过熔融共混法制备了PLA(聚乳酸)/PCL(聚己内酯)/ATBC共混物,然后采用微型挤出机制备用于熔融沉积(FDM)3D打印的共混物线材,研究了ATBC用量对共混物线材的直径、表面粗糙度、极限拉应力以及共混物相容性的影响,以及ATBC用量对3D打印制品的吸水性与力学性能的影响。结果表明,随着ATBC含量的增加,共混物线材的直径、表面粗糙度、极限拉应力逐渐变小,相容性得到改善。打印制品的吸水率降低,拉伸强度降低,但冲击性能得到有效地改善;当ATBC用量为6%时,3D打印共混物的断裂伸长率可达94.6%,冲击强度可达10.5kJ/m^2。

In this paper,PLA（Polylactic acid）/PCL（Polycaprolactone）blends were prepared by melt blending method with acetyl tributyl citrate（ATBC）as the compatibilizer.Filaments of PLA/PCL blends for FDM 3D printing technique were then prepared by micro extruder,and the effects of ATBC content on the filaments’ diameter,surface roughness,ultimate tensile stress,compatibility,together with the water absorption and mechanical properties of the 3D printed parts,were studied.The results show that the diameter,surface roughness and the tensile strength of the filaments of PLA/PCL blends gradually decreases with the increase of ATBC content,and the compatibility of the filaments was improved.The water absorption and tensile strength is reduced,but the impact performance is effectively improved.The breaking elongation of the printed parts can reach 94.6%,and the impact strength reaches 10.5 kJ/m^2 when the amount of ATBC relative to PLA/PCL blends is 6%.