Abstract Graphite microsheets as conductive fillers have their unique advantages compared with a traditional conductive fillers such as carbon black. Graphite microsheets have a large diameter-thickness ratio, which greatly reduces the percolation threshold of conductive composite system with graphite microsheets as conductive fillers. Under the action of applied electric field, the orientation of graphite microsheets in polymers changes the distribution of graphite in polymers. The conductivity of the composites can be changed. Because of the large diameter-thickness ratio, the nanographite microchip is easier to form conductive pathways in the composites. It can be imagined that the conductivity of ordinary graphite nanosheets can be achieved at a lower content as the ultra-fine dispersed graphite nanosheets. With the use of the conductive materials stated above and through the effect of applied electric field, we were able to get a new method of processing materials and functional materials with a higher design and better comprehensive performance. As conductive fillers, graphite nanosheets can be induced by the AC electric field in unsaturated polyester resin and then prepared oriented unsaturated polyester resin/graphite nanosheets composite. Compared with one-dimensional structure of carbon nanofiber and carbon nanotubes, two-dimensional lake-like shape graphite nanosheets have high aspect ratio. Applying an electric field during the preparation of the composite, graphite nanosheets can be oriented conquering the shearing action of viscous in an insulating polymer matrix due to the cooperative effect of the electric torque exerted by the electric field directly on the nanosheets. Finally, through the change of electric current of composite materials prepared in different media under electric field, we determine the influence factors of conductivity of composite materials and the conductive mechanism of nano-graphite micro-sheets under electric field.

中文翻译：

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电场制备不饱和树脂/石墨微芯片与纳米石墨微芯片复合材料的对比研究

摘要 石墨微片作为导电填料与炭黑等传统导电填料相比具有独特的优势。石墨微片具有较大的径厚比，大大降低了以石墨微片为导电填料的导电复合体系的渗透阈值。在外加电场的作用下，聚合物中石墨微片的取向改变了石墨在聚合物中的分布。复合材料的电导率可以改变。由于径厚比大，纳米石墨微芯片更容易在复合材料中形成导电通路。可以想象，普通石墨纳米片的导电性可以在比超细分散石墨纳米片更低的含量下实现。利用上述导电材料，通过外加电场的作用，我们得到了一种设计更高、综合性能更好的材料和功能材料的加工新方法。作为导电填料，石墨纳米片可以在不饱和聚酯树脂中通过交流电场诱导，进而制备取向不饱和聚酯树脂/石墨纳米片复合材料。与碳纳米纤维和碳纳米管的一维结构相比，二维湖状石墨纳米片具有较高的纵横比。在复合材料的制备过程中施加电场，由于电场直接施加在纳米片上的电扭矩的协同效应，石墨纳米片可以定向克服粘性在绝缘聚合物基体中的剪切作用。最后，通过在不同介质中制备的复合材料在电场作用下电流的变化，确定了复合材料电导率的影响因素和纳米石墨微片在电场作用下的导电机理。