实验制备了聚对苯二甲酸-己二酸丁二醇酯（PBAT）/淀粉复合材料，比较了几种表面活性剂对复合材料力学性能的影响，选择最佳表面活性剂并研究其用量对复合材料性能的影响。分析了PBAT/淀粉复合材料力学性能、熔体流动性能、亲水性能、热学性能。采用红外光谱仪、偏光显微镜对复合材料的分子结构与微观组织形貌进行表征。结果表明：表面活性剂十二烷基苯磺酸钠（SDBS）对淀粉的改性效果更好。当SDBS用量为15 g时，复合材料的拉伸强度为10.15 MPa，断裂伸长率达到639.49%。随着SDBS用量的增加，复合材料的熔体流动速率先减小后趋于平缓，亲水性能增加，结晶温度升高，但对熔融温度影响不明显。偏光显微镜显示晶体细化、尺寸变小。3 340 cm^-1的红外响应峰强度呈上升趋势。

In this experiment, poly(butylene adipate-co-terephthalate) (PBAT)/starch composites were prepared. The effects of several surfactants on the mechanical properties of the composites were compared, and the best surfactants were selected to study the effects of their dosage on the properties of the composites. The mechanical properties, melt flow, hydrophilic and thermal properties of PBAT/starch composites were analyzed, and the molecular structure and microstructure morphology of the composites were characterized by infrared spectroscopy and polarization microscope. The results show that sodium dodecylbenzene sulfonate (SDBS) has a better modification effect on starch. When the dosage of SDBS is 15 g, the tensile strength of the composite is 10.15 MPa, and the elongation at break is 639.49%. With the increase of SDBS, the melt flow rate of composites first decreases and then changes little, the hydrophilicity increases, and the crystallization temperature increases, but the effect on the melting temperature is not significant. Polarization microscopy shows that the crystal refinement and the size decreases. Infrared characterization shows an increasing trend in the intensity of the response peak at 3 340 cm^-1.