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Synergy effect in hybrid nanocomposites based on carbon nanotubes and graphene nanoplatelets

机译：基于碳纳米管和石墨烯纳米孔的杂种纳米复合材料中的协同作用

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Hybrid nanocomposites reinforced with a mixture of graphene nanoplatelets (GNPs) and carbon nanotubes (CNTs) have shown improvement in filler dispersion while providing a cost-effective alternative to CNT monofiller composites. Depending on their composition, hybrid composites can exhibit electrical performance superior to either of the constituent monofiller composites due to synergistic effects. In this work, we develop a three-dimensional tunneling-based continuum percolation model for hybrid nanocomposites filled with hardcore particles of elliptical GNPs and cylindrical CNTs. Using Monte Carlo simulations, parametric studies of the filler content, composition and morphology are carried out to analyze the conditions required for synergy in percolation onset and electrical conductivity. Our results suggest that for hybrid systems with well-dispersed fillers, the electrical performance is linked to the number of tunneling junctions per filler inside the percolated network of the nanocomposites. More importantly, hybrid composites filled with specific morphology of GNP and CNT, exhibit synergy in their electrical performance when the monofiller composites of each of those exact fillers have similar percolation onset values. The simulations results are in agreement with relevant experimental data on hybrid nanocomposites.
机译：用石墨烯纳米片（GNP）和碳纳米管（CNT）的混合物增强的杂化纳米复合材料显示出填充分散体的改善，同时为CNT单氮杂复合材料提供经济有效的替代方案。取决于它们的组成，混合复合材料可以由于协同效应而表现出优于组分单氮杂复合材料的电气性能。在这项工作中，我们开发了一种用于填充有椭圆形GNP和圆柱形CNT的硬核颗粒的杂化纳米复合材料的三维隧道连续渗透模型。使用蒙特卡罗模拟，进行了填料含量，组成和形态的参数研究，以分析在渗透发作和导电性的协同作用所需的条件。我们的研究结果表明，对于具有良好分散的填料的混合系统，电气性能与纳米复合材料的渗滤网中每填充物的隧道连接数有关。更重要的是，填充具有GNP和CNT的特异性形态的混合复合材料，当每种精确填料的单馏出物复合材料具有类似的渗透发作值时，在其电气性能下表现出协同作用。模拟结果与杂化纳米复合材料有关的相关实验数据一致。

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