Abstract Carbon nanomaterials are effective conductive fillers for permanent antistatic composites due to their long-term stability in electrical conductivity under ambient temperature and humidity. Where graphene or graphene-like materials have been demonstrated to be the most promising conductive fillers. However, the preparation of graphene and further dispersion into polymer matrices to obtain interconnected conductive networks is still a big challenge for conductive composites. A facile green path (all solid states), microsphere rolling transfer method, has been adopted to introduce nano-graphite conductive fillers for polyethylene. The nano-graphites were well dispersed into polyethylene matrices to give interconnected networks with low loading. The conductivity reinforcements of nano-graphite fillers even overtake those of complicated graphene fillers. The percolation threshold of the conductive composites with nano-graphite fillers for polyethylene has been demonstrated to be as low as 0.85 wt%. The electrical conductivity of the conductive composites was measured to increase by 13 orders of magnitude with 2.05 wt% nano-graphite fillers (0.02 S/m), much higher than traditional solid mixing methods and approaching to the best effects from complicated solution mixing of graphene fillers. The nano-graphite conductive networks are easily adjusted and the method is feasible to almost all conventional solid resins and industrial production.

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互连纳米石墨网络取代石墨烯作为导电填料的简便绿色途径

摘要 碳纳米材料因其在环境温度和湿度下的长期导电稳定性而成为永久性抗静电复合材料的有效导电填料。其中石墨烯或石墨烯类材料已被证明是最有前途的导电填料。然而，石墨烯的制备和进一步分散到聚合物基质中以获得互连的导电网络仍然是导电复合材料的一大挑战。一种简便的绿色路径（全固态），微球滚动转移方法，已被用于为聚乙烯引入纳米石墨导电填料。纳米石墨很好地分散在聚乙烯基质中，以提供低负载的互连网络。纳米石墨填料的导电性增强甚至超过了复杂的石墨烯填料。具有用于聚乙烯的纳米石墨填料的导电复合材料的渗透阈值已被证明低至 0.85 wt%。导电复合材料的电导率在 2.05 wt% 纳米石墨填料 (0.02 S/m) 的情况下增加了 13 个数量级，远高于传统的固体混合方法，并接近石墨烯复杂溶液混合的最佳效果填料。纳米石墨导电网络易于调节，该方法几乎适用于所有常规固体树脂和工业生产。85 重量％。导电复合材料的电导率在 2.05 wt% 纳米石墨填料 (0.02 S/m) 的情况下增加了 13 个数量级，远高于传统的固体混合方法，并接近石墨烯复杂溶液混合的最佳效果填料。纳米石墨导电网络易于调节，该方法几乎适用于所有常规固体树脂和工业生产。85 重量％。导电复合材料的电导率在使用 2.05 wt% 纳米石墨填料 (0.02 S/m) 的情况下提高了 13 个数量级，远高于传统的固体混合方法，并接近石墨烯复杂溶液混合的最佳效果填料。纳米石墨导电网络易于调节，该方法几乎适用于所有常规固体树脂和工业生产。