聚乳酸/聚己内酯（PLA/PCL）是一种环境友好的生物可降解复合材料，但材料的力学性能较差限制其使用范围。文章在PLA/PCL基体中掺杂了纳米蒙脱石3（NMM）制备PLA/PCL/NMM，并使用X射线衍射仪（XRD）、动态力学性能分析仪（DMA）和热重分析仪（TG）对PLA/PCL/NMM的性能进行表征。结果表明：NMM掺杂含量3%时，复合材料具有较好的综合性能。PLA/PCL/3%NMM的拉伸强度和弹性模量分别为58.1 MPa和4.1 GPa，相比PLA/PCL提升了31.4%和41.4%。PLA/PCL/3%NMM的断裂伸长率和冲击强度分别为6.4%和48.1 J/m²，相比PLA/PCL提升了14.3%和15.6%；PLA/PCL/3%NMM的储能模量提升至2 380 MPa。PLA/PCL/3%NMM的T _5%为312 ℃，说明复合材料的热稳定性增强。

Poly(lactic acid)/poly(caprolactone) (PLA/PCL) is an environmentally friendly biodegradable composite, but the poor mechanical properties limit its range of use. PLA/PCL/NMM was prepared by doping nano montmorillonite (NMM) into the PLA/PCL matrix, and the performance of PLA/PCL/NMM was characterized using X-ray diffraction (XRD), dynamic mechanical performance analyzer (DMA), and thermogravimetric analyzer (TG). The results show that when the NMM doping content is 3%, the composite has good comprehensive performance. The tensile strength and elastic modulus of PLA/PCL/3%NMM are 58.1 MPa and 4.1 GPa, respectively, which are 31.4% and 41.4% higher than PLA/PCL. The fracture elongation and impact strength of PLA/PCL/3%NMM are 6.4% and 48.1 J/m², respectively, which are 14.3% and 15.6% higher than PLA/PCL; The storage modulus of PLA/PCL/3%NMM is increased to 2 380 MPa. The T _5% of PLA/PCL/3%NMM is 312 ℃, indicating an enhanced thermal stability of the composite.