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首页> 外文期刊>Journal of Applied Polymer Science >Morphological and electrical characterization of conductive polylactic acid based nanocomposite before and after FDM 3D printing
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Morphological and electrical characterization of conductive polylactic acid based nanocomposite before and after FDM 3D printing

机译：FDM 3D印刷前后导电聚乳酸纳米复合材料的形态学和电学特性

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摘要

Three dimensional (3D) printing holds strong potential for the formation of a new class of multifunctional nanocomposites. Therefore, both the nanocomposites and 3D printing communities need to make more collaborations and innovations for developing and processing of new polymers and composites to get benefit of functionalities of 3D printed nanocomposites. The contribution of this paper is the creation of 3D printable filaments from conductive polymer nanocomposites using a melt mixing process. Multi-walled carbon nanotubes (MWNTs) and high-structured carbon black (Ketjenblack) (KB) were incorporated into polylactic acid. The percolation threshold of MWNT composites is 0.54 wt % and of KB composites is 1.7 wt % by four-point resistance measurement method. In the similar melt mixing process, there was no dependence of diameter of produced 3D printer filaments on the MWNT loading, instead the diameter was dependent on the KB loading and increased with increasing the filler amount. The conductivity of extruded filaments from 3D printer in low filler contents decreases with increasing extruder temperature, yet in higher filler contents there is no effect of extruder temperature on conductivity. Finally, the resistance decreases exponentially with the increase of cross-sectional area of 3D printed tracks. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47040.
机译：三维（3D）印刷对形成新类多功能纳米复合材料具有很强的潜力。因此，纳米复合材料和3D印刷社区都需要制定更多的合作和创新，用于开发和加工新的聚合物和复合材料，以获得3D印刷纳米复合材料的功能的益处。本文的贡献是使用熔融混合方法从导电聚合物纳米复合材料中创建3D可打印长丝。将多壁碳纳米管（MWNT）和高结构炭黑（Ketjenblack）（Kb）掺入聚乳酸中。 MWNT复合材料的渗透阈值为0.54wt％，kB复合材料是通过四点电阻测量方法为1.7wt％。在类似的熔融混合过程中，在MWNT负载上没有产生的3D打印机长丝的直径依赖性，而是取决于Kb负载并随着增加填料量而增加。在低填充物内从3D打印机的挤出长丝的导电性随着挤出机温度的增加而降低，但在较高的填充物含量中没有挤出机温度对电导率的影响。最后，随着3D印刷轨道的横截面积的增加，电阻呈指数级增长。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,47040。

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