中国物理B ›› 2009, Vol. 18 ›› Issue (3): 1221-1226.doi: 10.1088/1674-1056/18/3/063

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Electrical, dielectric and surface wetting properties of multi-walled carbon nanotubes/nylon-6 nanocomposites

龙云泽1, 李蒙蒙1, 隋万美1, 张磊1, 孔庆山2   

  1. (1)College of Physics Science, Qingdao University, Qingdao 266071, China; (2)Laboratory of Fibre Materials and Modern Textile, the Growing Base for State Key Laboratory, Qingdao University, Qingdao 266071, China
  • 收稿日期:2008-07-09 修回日期:2008-08-13 出版日期:2009-03-20 发布日期:2009-03-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10604038) and the Program for New Century Excellent Talents in University of China (Grant No NCET-07-0472).

Electrical, dielectric and surface wetting properties of multi-walled carbon nanotubes/nylon-6 nanocomposites

Long Yun-Ze(龙云泽)a)†, Li Meng-Meng(李蒙蒙)a), Sui Wan-Mei(隋万美)a), Kong Qing-Shan(孔庆山)b), and Zhang Lei(张磊)a)   

  1. a College of Physics Science, Qingdao University, Qingdao 266071, China; b Laboratory of Fibre Materials and Modern Textile, the Growing Base for State Key Laboratory, Qingdao University, Qingdao 266071, China
  • Received:2008-07-09 Revised:2008-08-13 Online:2009-03-20 Published:2009-03-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10604038) and the Program for New Century Excellent Talents in University of China (Grant No NCET-07-0472).

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摘要： This paper reports that the multi-walled carbon nanotubes (MWCNT)/nylon-6 (PA6) nanocomposites with different MWCNT loadings have been prepared by a simple melt-compounding method. The electrical, dielectric, and surface wetting properties of the CNT/PA6 composites have been studied. The temperature dependence of the conductivity of the CNT/PA6 composite with 10.0 wt{\%} CNT loading ($\sigma _{\rm RT} \sim 10^{-4}$ S/cm) are measured, and afterwards a charge-energy-limited tunnelling model (ln $\sigma (T) \sim T^{-1/2})$ is found. With increasing CNT weight percentage from 0.0 to 10.0 wt%, the dielectric constant of the CNT/PA6 composites enhances and the dielectric loss tangent increases two orders of magnitude. In addition, water contact angles of the CNT/PA6 composites increase and the composites with CNT loading larger than 2.0 wt%even become hydrophobic. The obtained results indicate that the electrical and surface properties of the composites have been significantly enhanced by the embedded carbon nanotubes.

关键词: carbon nanotubes, composites, electrical conductivity, dielectric property

Abstract: This paper reports that the multi-walled carbon nanotubes (MWCNT)/nylon-6 (PA6) nanocomposites with different MWCNT loadings have been prepared by a simple melt-compounding method. The electrical, dielectric, and surface wetting properties of the CNT/PA6 composites have been studied. The temperature dependence of the conductivity of the CNT/PA6 composite with 10.0 wt% CNT loading ($\sigma _{\rm RT} \sim 10^{-4}$ S/cm) are measured, and afterwards a charge-energy-limited tunnelling model (ln $\sigma (T) \sim T^{-1/2})$ is found. With increasing CNT weight percentage from 0.0 to 10.0 wt%, the dielectric constant of the CNT/PA6 composites enhances and the dielectric loss tangent increases two orders of magnitude. In addition, water contact angles of the CNT/PA6 composites increase and the composites with CNT loading larger than 2.0 wt%even become hydrophobic. The obtained results indicate that the electrical and surface properties of the composites have been significantly enhanced by the embedded carbon nanotubes.

Key words: carbon nanotubes, composites, electrical conductivity, dielectric property

中图分类号:  (Nanotubes)

  • 73.63.Fg
68.08.Bc (Wetting) 73.40.Gk (Tunneling) 77.22.Ch (Permittivity (dielectric function)) 77.22.Gm (Dielectric loss and relaxation)