铜纤维/脲醛树脂复合膜片的导电性能  

Conductive Properties of UF Adhesive Sheets Filled with Copper Fiber

作　　者：卢克阳[1] 傅峰[1] 蔡智勇 张恩玖 

机构地区：[1]中国林业科学研究院木材工业研究所,北京100091 [2]美国林产品研究所,麦迪逊537262398 [3]浙江久盛地板有限公司,湖州313009

出　　处：《林业科学》2009年第7期169-174,共6页Scientia Silvae Sinicae

基　　金："十一五"国家科技支撑课题"家具装修材增值加工技术"(2006BAD18B06);中央级公益性科研院所基本科研业务费专项资金"电磁屏蔽板材的制备及工程应用技术研究"(CAFYBB2008019)资助

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.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.

关 键 词：铜纤维 脲醛树脂 导电膜片 渗滤效应 三维导电网络 

分 类 号：TQ342.83[化学工程—化纤工业]