以木薯淀粉为研究对象，添加不同表面性质的纳米二氧化硅（SiO₂），通过熔融共混法制备热塑性木薯淀粉（TPS）/SiO₂复合材料，研究复合材料的塑化性能、力学性能、耐水性和稳定性。研究结果表明，疏水SiO₂能较好地促进淀粉的塑化，且添加疏水纳米SiO₂的淀粉复合材料TPS-L12塑化时间最短、拉伸强度最高；添加疏水纳米SiO₂的淀粉复合材料的透光率低于添加亲水纳米SiO₂，但耐水性有所提高；添加疏水纳米SiO₂的淀粉复合材料的热分解温度高于添加亲水纳米SiO₂，其中TPS-L12的热降解温度最高。

Thermoplastic cassava starch (TPS)/SiO₂ composites are prepared through melt blending method by using cassava starch as research object and adding nano-SiO₂ with different surface properties.The plasticizing properties, mechanical properties, water resistance and stability of the composites are explored.It is shown that hydrophobic SiO₂ can promote the plasticization of starch.The starch composite added with hydrophobic TPS-L12 nano-SiO₂ needs the shortest plasticization time and represents the highest tensile strength.The tensile strength of the sample added with hydrophilic TPS-H10 is the lowest.The starch composites added with hydrophobic nano-SiO₂ show lower light transmittance, higher water assistance and higher thermal decomposition temperature than that added with hydrophilic SiO₂.The starch composites added with hydrophobic TPS-L12 nano SiO₂ exhibits the highest thermal degradation temperature.