采用双螺杆挤出机液体进料工艺，制备了聚乳酸/柠檬酸三丁酯（PLA/TBC）固-液共混材料，表征了其性能。结果表明：双螺杆挤出机液体进料工艺能够精确控制TBC在PLA中的质量分数；傅里叶红外光谱仪微观结构表征了2877 cm-1特征峰的出现、羟基伸缩振动峰红移，证明TBC对PLA起到了增塑作用；当TBC含量为16%(质量分数)时共混材料从脆性材料转变为韧性材料；降解实验显示，这种共混薄膜在6个月内性能基本消失，轻微受力时薄膜粉碎。

PLA/TBC solid-liquid blend materials were prepared through liquid feeding process in twin-screw extruder and its performance was characterized. Test results showed that the twin-screw extruder liquid feeding process can precisely control the mass fraction of the PLA in TBC score. 2877 cm-1 the characteristic peak and the emergence of —OH telescopic vibrating peaks red-shift was founded in FT-IR spectrometer inspection, which proved that TBC has the plastic role; when TBC content w=16%, its mechanical performance of materials change from brittle into ductile material; through the degradation test, the mechanical properties of PLA/TBC blend materials disappearance within 180 days and the film changes into pieces form by slightly power.