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采用熔融共混技术制备了氧化石墨烯(GO)-nano SiO_2杂化材料填充改性的形状记忆热塑性聚氨酯(GO-nano SiO_2/TPU)复合材料,探讨了GO-nano SiO_2杂化材料对复合材料力学性能、熔融指数及形状记忆性能的影响。结果表明:GO-nano SiO_2含量对GO-nano SiO_2/TPU复合材料的力学性能有明显的影响,其含量为0.5wt%~1wt%时,GO-nano SiO_2/TPU复合材料的综合力学性能较好。熔融指数分析表明,填料的加入会降低材料的加工流动性能。形状记忆性能研究表明,加入GO-nano SiO_2杂化材料使得GO-nano SiO_2/TPU复合材料的形状固定率先降低后上升,在含量为1wt%后上升趋势更加明显;而形状回复率随填料含量的增加而呈降低趋势,并且在100℃高温这种变化趋势更加明显和稳定,回复温度越高,形状回复率越好。
GO-nano SiO 2 / TPU composites filled with graphene oxide (GO) -nano SiO 2 hybrid materials were prepared by melt blending technique. The effects of GO-nano SiO 2 hybrid materials on the composites Mechanical properties, melt index and shape memory properties. The results show that the GO-nano SiO 2 / TPU composites have a significant effect on the mechanical properties of GO-nano SiO 2 / TPU composites. When the content of GO-nano SiO 2 / TPU is 0.5wt% ~ 1wt%, GO- . Melt index analysis shows that the addition of filler will reduce the processing flow properties of the material. The shape memory properties of GO-nano SiO 2 / TPU composites show that the shape retention of GO-nano SiO 2 / TPU composites firstly decreases and then increases, and then increases with the addition of GO-nano SiO 2. The shape recovery of GO-nano SiO 2 / Increase and showed a downward trend, and at 100 ℃ high temperature this trend is more obvious and stable, the higher the recovery temperature, the better the shape recovery rate.