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首页> 外文期刊>Advanced Functional Materials >Piezoresistive Behavior Study on Finger-Sensing Silicone Rubber/Graphite Nanosheet Nanocomposites
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Piezoresistive Behavior Study on Finger-Sensing Silicone Rubber/Graphite Nanosheet Nanocomposites

机译：手指传感硅橡胶/石墨纳米片纳米复合材料的压阻行为研究

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摘要

A novel finger-sensing nanocomposite with remarkable and reversible piezoresistivity is successfully fabricated by dispersing homogeneously conductive graphite nanosheets (GNs) in a silicone rubber (SR) matrix. Because of the high aspect ratio of the graphite nanosheets. the nanocomposite displays a very low percolation threshold. The SR/GN nanocomposite with a volume fraction of conductive nanosheets closest to that for the percolation threshold presents a sharp positive-pressure coefficient effect of the resistivity under very low pressure, namely, in the finger-pressure range (0.3-0.7 MPa), whereby the abrupt transition could be attributed to compressive-stress-induced deformation of the conducting network. The super-sensitive piezoresistive behavior of the nanocomposite is accounted for by an extension of the tunneling conduction theory which provides a good approximation to the piezoresistive effect.
机译：通过将均匀导电的石墨纳米片（GNs）分散在硅橡胶（SR）基质中，成功制造了具有出色且可逆压阻性的新型手指感应纳米复合材料。由于石墨纳米片的高长宽比。纳米复合材料的渗透阈值非常低。导电纳米片的体积分数最接近渗透阈值的SR / GN纳米复合材料在非常低的压力下（即在指压范围（0.3-0.7 MPa））呈现出电阻率的明显正压系数效应，因此，突然转变可以归因于压缩应力引起的导电网络变形。纳米复合材料的超灵敏压阻行为是通过隧穿传导理论的扩展来解释的，该理论为压阻效应提供了良好的近似值。

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