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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Mechanical and electrical properties of carbon nanotube reinforced
 epoxide resin composites
LIANG Shu-quan(梁叔全), JIA Chun-yan(贾春燕), TANG Yan(唐  艳),
ZHANG Yong(张  勇), ZHONG Jie(钟  杰), PAN An-qiang(潘安强)

School of Materials Science and Engineering, Central South University, Changsha 410083, China

Abstract:Carbon nanotubes (CNTs)/epoxide resin composites were prepared, the mechanical and electrical properties of the composites were investigated. The effects of concentration and dispersion state of CNTs on the tensile strength, tensile modulus and electrical resistance of the composites were studied. The results indicate that the CNTs can be dispersed well in the epoxide resin matrix by ultrasonic method, and the mechanical and electrical properties of epoxide resin matrix can be improved significantly. The tensile tests show that the tensile strength and tensile modulus are higher than those of epoxide resin if the content of CNTs is less than 1.75% (mass fraction). When the content of CNTs is 0.75%, the conditional best results are obtained, the tensile strength of the composite is the highest, increased by 18.3% and the tensile modulus is increased by 20.5% compared with the matrix. With the increase of CNTs, the electrical resistance of the composites decreases greatly, while the conductivity of the composite increases. The percolation threshold values of electrical characteristic transformation for this composite material were determined for the first time.

 

Key words: carbon nanotubes; composites; epoxide resin; mechanical properties; electrical properties

ISSN 1672-7029
CN 43-1423/U

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