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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Low filled conductive P(VDF-TrFE) composites: Influence of silver particles aspect ratio on percolation threshold from spheres to nanowires
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Low filled conductive P(VDF-TrFE) composites: Influence of silver particles aspect ratio on percolation threshold from spheres to nanowires

机译：低填充导电P（VDF-TrFE）复合材料：银颗粒的长宽比对从球到纳米线的渗透阈值的影响

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摘要

Polymer composites filled with silver nanowires enable the highest value of electrical conductivity known up to now in the case of conductive nanoparticle dispersion with a percolation threshold less than 1 vol%. Silver nanowires with high aspect ratio were elaborated by two types of synthesis: electrochemical deposition in a template and polyol synthesis. For the first time the influence of each kind of nanowires in composites was studied and compared to spherical nanoparticles as reference. The value of percolation threshold and conductivity level above the percolation threshold were measured and compared. These silver nanowires were introduced into poly(vinylidenedifluoride-trifluoroethylene) in comparison to spherical silver nanoparticles. The preparation method modified the effective aspect ratio of nanowires. The low percolation threshold and the microscopy observations confirmed the good dispersion of nanowires in composites. The lowest percolation threshold was determined in the case of the polyol synthesis nanowires (0.63 vol%) in comparison with electrochemical deposited nanowires (2.2 vol%). The level of conductivity above the percolation threshold obtained with each kind of particles is in the same range near 100 S.m ~(- 1). The value of electrical conductivity obtained above the percolation threshold is unusual at this low content of conductive filler and is observed for the first time in a conductive polymer composite.
机译：填充有银纳米线的聚合物复合材料在渗透阈值小于1 vol％的导电纳米颗粒分散体的情况下，可以实现迄今为止已知的最高电导率。高纵横比的银纳米线可通过两种类型的合成进行精加工：模板中的电化学沉积和多元醇合成。首次研究了各种纳米线在复合材料中的影响，并与球形纳米颗粒作了比较。测量并比较渗透阈值和高于渗透阈的电导率水平。与球形银纳米颗粒相比，这些银纳米线被引入到聚（偏二氟乙烯-三氟乙烯）中。该制备方法改变了纳米线的有效长径比。低渗透阈值和显微镜观察结果证实了纳米线在复合材料中的良好分散性。与多元醇合成纳米线（2.2体积％）相比，在多元醇合成纳米线（0.63体积％）的情况下确定最低的渗透阈值。用每种颗粒获得的超过渗滤阈值的电导率水平在100 S.m〜（-1）附近的相同范围内。在这种低含量的导电填料下，获得高于渗滤阈值的电导率值是不寻常的，并且在导电聚合物复合材料中首次观察到。

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