The purpose of the present work is to investigate the influence of plasma treatment on the microstmcture and tensile deformation of the plasma treated nano-SiO2/polypropylene (PP)/polylactic acid (PLA) nano-composite filaments. The APPJ plasma treatment parameters, such as treatment helium, treatment oxygen, treatment time and output power, had very close relations with the tensile and thermal properties of the plasma treated nano-SiO2/PP/PLA nano-composite filaments based on the experimental results of tensile tests and DSC. The combination of 0. 1mL/min treatment oxygen and 18mL/min treatment helium for the sample resulted in the largest activation volume of sample, indicating that the two parameters effectively assisted nano-SiO2 to act as obstacles to dislocation motion during mircro-structural plastic deformation mechanisms. And sample with 17mL/min treatment helium had the highest viscosity among all the chosen samples. Then, sample processed under 0. 2mL/min treatment oxygen, 20mL/min treatment helium, 108s treatment time and 120W output power was the optimum plasma treatment condition for Tg and Tm of the nano-composite filaments.%等离子体处理参数对聚丙烯/聚乳酸纳米复合长丝微观结构和拉伸变形性能有非常密切的关系.拉伸试验、DSC和电镜实验结果表明,加工参数为氧0.1L/min和氨18L/min处理得到样品的热激活体积大;纳米二氧化硅在纳米复合长丝高分子微观结构塑性变形机制中起到阻碍作用.加工参数:氧0.2L/min、氮20L/min、处理时间108s和处理功率120W,可以得到相应加工范围的最佳Tg和Tm的纳米复合长丝.
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