Silicone rubber/graphite nanosheet electrically conducting nanocomposite with a low percolation threshold
Silicone rubber/graphite nanosheet electrically conducting nanocomposite with a low percolation threshold
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DOI：
10.1002/pc.20323
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发表时间：
2007-08
影响因子：
5.2
通讯作者：
Ling Chen;Liangzhi Lu;Dajun Wu;Guohua Chen
中科院分区：
文献类型：
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作者：
Ling Chen;Liangzhi Lu;Dajun Wu;Guohua Chen
通过将均匀导电的石墨纳米片（GN）分散在绝缘硅橡胶（SR）基质中，成功制备了一种新型导电纳米复合材料。 GN 是通过在乙醇水溶液中超声粉碎膨胀石墨来制备的。 GN厚度为30-80 nm、高长径比的特殊几何形状有助于形成导电网络的优势，使得SR/GN纳米复合材料的渗流阈值约为0.009，远低于传统石墨复合材料的渗流阈值。 SR/GN 纳米复合材料在极低的压力下表现出显着的压阻行为，这与复合材料的低弹性模量有关。讨论了不同GN含量和不同压缩速度下纳米复合材料的弹性模量。
A novel electrically conductive nanocomposite was successfully fabricated by dispersing homogeneously conductive graphite nanosheets (GN) in an insulating silicone rubber (SR) matrix. GN were prepared by powdering expanded graphite with sonication in aqueous alcoholic solution. The particular geometry of GN 30-80 nm in thickness with high aspect ratio contributes to the advantage of forming the conducting network, so that the percolation threshold of SR/GN nanocomposite is about 0.009, much lower than that of composites with conventional graphite. The SR/GN nanocomposite presents a remarkable piezoresistive behavior under much low pressure, related to the low elastic modulus of the composite. The elastic modulus of the nanocomposite with various GN content and at the different speed of compression was discussed.