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A numerical investigation on piezoresistive behaviour of carbon nanotube/polymer composites: Mechanism and optimizing principle

机译：碳纳米管/聚合物复合材料压阻行为的数值研究：机理和优化原理

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Carbon nanotubes (CNTs) filled polymeric composites can be used as a kind of flexible piezoresistive material in potentially many fields. Due to the diversity of CNTs and polymers, the mechanism and features of their piezoresistive behaviour is still not fully understood. This paper reports our investigations into the mechanism and optimization of piezoresistive CNT/polymer composites. Numerical simulation results showed that the junction resistances between CNTs are a major component of the network conductance of the composite as well as the piezoresistive behaviour. Average junction gap variation (AJGV) was introduced as a quantitative description of the conductance variation of a CNT network caused by strain and the conductance variation of the CNT network was found to be dominated by AJGV. Numerical simulation and analytical results indicated that the key parameters affecting AJGV include the orientation and diameter of CNTs, Poisson's ratio of the polymer, and the concentration of CNTs in the polymer matrix. An optimizing principle was then given for piezoresistive CNT/polymer composites.
机译：碳纳米管（CNT）填充的聚合物复合材料可用作潜在许多领域中的一种柔性压阻材料。由于碳纳米管和聚合物的多样性，其压阻行为的机理和特征仍不完全清楚。本文报告了我们对压阻CNT /聚合物复合材料的机理和优化的研究。数值模拟结果表明，碳纳米管之间的结电阻是复合材料网络电导以及压阻行为的主要组成部分。引入平均结隙变化（AJGV）作为对由应变引起的CNT网络电导率变化的定量描述，发现CNT网络的电导率变化受AJGV支配。数值模拟和分析结果表明，影响AJGV的关键参数包括CNT的方向和直径，聚合物的泊松比以及聚合物基质中CNT的浓度。然后给出了压阻CNT /聚合物复合材料的优化原理。

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