作 者 :卢克阳 傅 峰 蔡智勇 张恩玖
期 刊 :林业科学 2009年 45卷 7期 页码:169-174
关键词:铜纤维 ;脲醛树脂 ;导电膜片 ;渗滤效应 ;三维导电网络 ;
摘 要 :
Conductive sheets consisting of copper fibers,urea formaldehyde resins and decorative papers were prepared by hot pressing. The results showed that the sheet resistance of composites had mutations with the increasing of copper fiber filling ratio.The sheets exhibited percolation threshold effect. The threshold of sheets filled with 5 mm copper fibers was about 16% and the threshold of sheets filled with 10 mm or 15 mm copper fibers were about 8.7%. Meanwhile,the sheets showed piezoresistive characteristics and the conductive structure of sheets have been gradually developped into “three-dimensional conductive network” from “two-dimensional conductive network”. Moreover,the length of copper fibers showed strong effects to the conductivity. Under the same fiber filling ratio,the larger length of fiber was,the higher conductivity and the lower percolation threshold could be.
Abstract:
copper fiber; urea formaldehyde resin; conductive sheet; percolation threshold effect; three-dimensional conductive network
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