Yu Wangwang, Li Mengya, Lei Wen, Chen Yong
School of Mechanical Engineering, Nanjing Vocational University of Industry Technology, Nanjing 210023, China.
Jiangsu Province Precision Manufacturing Engineering and Technology Research Center, Nanjing 210023, China.
Polymers (Basel). 2024 Apr 18;16(8):1140. doi: 10.3390/polym16081140.
Biodegradable polylactic acid (PLA) has been widely used in fused deposition modeling (FDM) 3D printing. In order to improve its comprehensive properties in 3D printing, in this study, 0-40% content of polybutylene adipate terephthalate(PBAT) was selected to be blended with PLA in a twin-screw extruder; the resulting pellets were drawn into a homogeneous filament; then, PBAT/PLA samples were prepared by FDM 3D printing, and the effects of the dosage of PBAT on the mechanical properties, thermal behavior, surface wettability and melt flowability of the samples were investigated. The results showed that all the samples could be printed smoothly, and the ductility was slightly improved by the increase in the PBAT dosage; the thermal stability of PLA was enhanced by blending with PBAT, and the crystallinity increased monotonically with the increase in PBAT. After blending with PBAT, the surfaces of the samples were more hydrophilic and flowable. The important conclusion achieved in this work was that the PBAT/PLA blends, especially those containing 30%PBAT, showed great potential to replace petroleum-based plastics and are suitable for use in FDM 3D printing technologies for different applications.
可生物降解的聚乳酸（PLA）已广泛应用于熔融沉积建模（FDM）3D打印。为了改善其在3D打印中的综合性能，本研究选择0-40%含量的聚己二酸丁二醇酯对苯二甲酸酯（PBAT）在双螺杆挤出机中与PLA共混；将所得粒料制成均匀的长丝；然后，通过FDM 3D打印制备PBAT/PLA样品，并研究PBAT用量对样品力学性能、热行为、表面润湿性和熔体流动性的影响。结果表明，所有样品均能顺利打印，随着PBAT用量的增加，延展性略有提高；与PBAT共混提高了PLA的热稳定性，结晶度随PBAT的增加而单调增加。与PBAT共混后，样品表面更亲水且流动性更好。本工作得出的重要结论是，PBAT/PLA共混物，尤其是含30%PBAT的共混物，具有取代石油基塑料的巨大潜力，适用于不同应用的FDM 3D打印技术。
