Two-dimensional layered materials (2DLMs), MoS₂ and WS₂, and three-dimensional (3D) graphite were infused in thermoplastic polymer matrices comprised of acrylonitrile butadiene styrene (ABS) and polyethylene terephthalate glycol (PETG). Two processing approaches were examined for creating polymer tensile test specimens using the composites for mechanical testing, which included three-dimensional (3D) printing and injection molding. The ductility generally decreased with the addition of the fillers indicated by an increase in Young’s modulus and a corresponding decrease in yield stress and tensile stress for the 2DLM-polymer composites. The dynamic friction data of the composites were measured in an attempt to exploit the solid phase lubricating properties of graphite and the 2DLM fillers. Graphite proved to lower the dynamic friction in the cases of 3D printed PETG and injection molded ABS, while MoS₂ and WS₂ were found to reduce friction in 3D printed PETG and ABS. Finally, the thermal conductivities of these polymer matrix composites were measured and compared to the pure polymer matrices. The thermal conductivity increased in both ABS and PETG composites containing graphite, MoS₂, and WS₂, irrespective of their processing routes. The use of 2DLM-based polymer composites remains an area of interest for a wide range of applications in the future, such as wearable electronics and sensors with low-cost additive manufacturing approaches.

中文翻译：

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具有2D层状材料的3D打印和注塑聚合物基复合材料

二维分层材料（2DLM），MoS ₂和WS ₂，然后将三维（3D）石墨注入到由丙烯腈丁二烯苯乙烯（ABS）和聚对苯二甲酸乙二醇酯（PETG）组成的热塑性聚合物基体中。使用了用于机械测试的复合材料检查了两种处理方法以创建聚合物拉伸测试样品，包括三维（3D）打印和注塑成型。2DLM-聚合物复合材料的杨氏模量增加以及屈服应力和拉应力的相应降低表明，添加了填料后，塑性通常下降。测量了复合材料的动摩擦数据，以尝试利用石墨和2DLM填料的固相润滑性能。事实证明，石墨可以降低3D打印PETG和注塑ABS的动态摩擦，而MoS发现₂和WS ₂可以减少3D打印PETG和ABS中的摩擦。最后，测量了这些聚合物基复合材料的导热率，并将其与纯聚合物基体进行了比较。包含石墨，MoS ₂和WS _2的ABS和PETG复合材料的热导率均增加，而与它们的加工路线无关。基于2DLM的聚合物复合材料的使用仍然是未来广泛应用的关注领域，例如具有低成本增材制造方法的可穿戴电子产品和传感器。