Abstract The mechanical properties, electrical conductivity and piezoresistive response of thermosetting polymer nanocomposites comprising carbon nanotubes (CNTs, one-dimensional topology, 1D), few-layer thermally reduced graphene oxide (FLG, two-dimensional topology, 2D), cubic-shaped few-layer graphene shells (CGSs, three-dimensional topology, 3D), and hybrid combinations of them (1D-2D and 1D-3D) are investigated. It is observed that the most electro-conductive materials are formed when CGSs, CNTs or a hybrid combination of both are used, likely because of the lower defect density of CGSs and the higher aspect ratio of CNTs. The mechanical properties and piezoresistive sensitivity are higher for composites comprising CNTs or a 1D-2D hybrid combination of CNTs and FLGs. While the increased mechanical properties for these two groups of composites are attributed to the higher aspect ratio/lateral size, higher number of dangling bonds and functionalities, and higher specific surface area (for the case of FLGs) of their fillers, the increased piezoresistive sensitivity is explained in terms of their higher excluded volume within the composite.

中文翻译：

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不同拓扑结构碳纳米结构聚合物复合材料力学、电学和压阻性能的比较研究

摘要 包含碳纳米管（CNTs，一维拓扑结构，1D）、少层热还原氧化石墨烯（FLG，二维拓扑结构，2D）、立方形少数结构的热固性聚合物纳米复合材料的机械性能、电导率和压阻响应。研究了层石墨烯壳（CGS、三维拓扑、3D）及其混合组合（1D-2D 和 1D-3D）。据观察，当使用 CGS、CNT 或两者的混合组合时，会形成最导电的材料，这可能是因为 CGS 的缺陷密度较低，而 CNT 的纵横比较高。包含 CNT 或 CNT 和 FLG 的 1D-2D 混合组合的复合材料的机械性能和压阻灵敏度更高。