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Electrical and Thermal Conductivity of Polylactic Acid (PLA)-Based Biocomposites by Incorporation of Nano-Graphite Fabricated with Fused Deposition Modeling

机译:通过融合沉积建模制造的纳米石墨聚乳酸(PLA)为基础的生物复合材料的电导率和导热率。

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摘要

The aim of the study was to improve the electrical and thermal conductivity of the polylactic acid/wood flour/thermoplastic polyurethane composites by Fused Deposition Modeling (FDM). The results showed that, when the addition amount of nano-graphite reached 25 pbw, the volume resistivity of the composites decreased to 108 Ω·m, which was a significant reduction, indicating that the conductive network was already formed. It also had good thermal conductivity, mechanical properties, and thermal stability. The adding of the redox graphene (rGO) combined with graphite into the composites, compared to the tannic acid-functionalized graphite or the multi-walled carbon nanotubes, can be an effective method to improve the performance of the biocomposites, because the resistivity reduced by one order magnitude and the thermal conductivity increased by 25.71%. Models printed by FDM illustrated that the composite filaments have a certain flexibility and can be printed onto paper or flexible baseplates.
机译:该研究的目的是通过熔融沉积建模(FDM)改善聚乳酸/木粉/热塑性聚氨酯复合材料的电导率和导热率。结果表明,当纳米石墨的添加量达到25 pbw时,复合材料的体积电阻率降低到10 8 Ω·m,这是一个明显的降低,表明导电网络是已经形成。它还具有良好的导热性,机械性能和热稳定性。与单宁酸官能化的石墨或多壁碳纳米管相比,将氧化还原石墨烯(rGO)与石墨结合添加到复合材料中是一种有效的方法,可提高生物复合材料的性能,因为电阻率会降低一个数量级,导热系数提高了25.71%。 FDM打印的模型表明,复合长丝具有一定的柔韧性,可以印在纸或柔性基板上。

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