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

【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 con-ductivity of the CNT/PA6 composite with 10.0 wt% CNT loading(σRT-10-4 S/cm) are measured,and afterwards a charge-energy-limited tunnelling model(ln 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.更多还原

【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 con-ductivity of the CNT/PA6 composite with 10.0 wt% CNT loading(σRT-10-4 S/cm) are measured,and afterwards a charge-energy-limited tunnelling model(ln 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.更多还原