Electrical percolation of fibre mixtures

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• 作者：Juan Xie ; Stuart Gordon ; Hairu Long ; Menghe Miao
• 刊名：Applied Physics A: Materials Science & Processing
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：121
• 期：2
• 页码：589-595
• 全文大小：1,296 KB
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• 作者单位：Juan Xie (1) (2) (3)
  Stuart Gordon (1)
  Hairu Long (2) (3)
  Menghe Miao (1)
  
  1. CSIRO Manufacturing, P.O. Box 21, Belmont, VIC, 3216, Australia
  2. College of Textiles, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China
  3. Key Laboratory of Textile Science & Technology, Ministry of Education, Donghua University, Shanghai, 201620, China
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Condensed Matter
  Optical and Electronic Materials
  Nanotechnology
  Characterization and Evaluation Materials
  Surfaces and Interfaces and Thin Films
  Operating Procedures and Materials Treatment
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-0630

文摘

In the development of conductive threads for wearable electronics, nonconductive cotton fibres and conductive stainless steel fibres are mixed to produce composite yarns at a wide range of stainless steel fibre weight fractions. The electrical resistance of the composite yarns is measured at different probe span lengths, ranging from 0.5 to 10 L _ss (L _ss = 50 mm is the average length of stainless steel fibres). The percolation threshold and critical exponent are determined for each span length. The critical exponent followed a decreasing trend from 1.87 to 1.17 as the span length was increased. When the conductive fibre loading was expressed in terms of conductive fibre volume fraction, the percolation critical exponent showed a similar trend of change with probe span length. Such a dependence of percolation critical exponent on resistance probe span length has not been previously reported for conductive particle-filled polymer composites, probably because the probe span length used in resistance measurement is orders of magnitude larger than the dimension of the conductive fillers in the composites.