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

作　　者：龙云泽 李蒙蒙 隋万美 孔庆山 张磊 

机构地区：[1]College of Physics Science,Qingdao University [2]Laboratory of Fibre Materials and Modern Textile,the Growing Base for State Key Laboratory,Qingdao University

出　　处：《Chinese Physics B》2009年第3期1221-1226,共6页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No 10604038);the Program for New Century Excellent Talents in University of China (Grant No NCET-07-0472)

摘　　要：This paper reports that the multi-walled carbon nanotubes （MWCNT）/nylon-6 （PA6） nanocomposites with dif- ferent 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 10.0wt% CNT loading （σRT - 10^-4 S/cm） are measured, and afterwards a charge-energy-limited tunnelling model （In σ（T） - 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.This paper reports that the multi-walled carbon nanotubes （MWCNT）/nylon-6 （PA6） nanocomposites with dif- ferent 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 10.0wt% CNT loading （σRT - 10^-4 S/cm） are measured, and afterwards a charge-energy-limited tunnelling model （In σ（T） - 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 

分 类 号：O613.71[理学—无机化学] TB383.1[理学—化学]