高速剪切对碳纳米管/环氧树脂复合材料导电性能的影响

Effect of High Speed Shear on Conductive Performance of Carbon Nanotube/Epoxy Resin Composite

摘要: 为提高碳纳米管在复合材料中的分散性,利用高速剪切分散工艺将碳纳米管分散于环氧树脂基体中制备碳纳米管/环氧树脂复合材料,研究了剪切时间和碳纳米管加入量对复合材料导电性能的影响.结果表明:剪切速率一定时,复合材料表面电阻率随剪切时间的增加而降低,但当剪切时间超过10 min,对导电性能的影响不再明显;随着碳纳米管加入量的增加,复合材料导电性能提高,当碳纳米管的质量分数高于10%时,导电性能的变化趋于平缓.

Abstract: To improve the disperse ability of carbon nanotubes (CNTs) in composites,CNTs were blended with epoxy resins (EP) to prepare conductive composite materials using high speed shear dispersion process.And the effects of shearing time and fraction of CNTs on the conductive performance of the composites was investigated.The results show that when shearing speed is certain,the conductivity of composites is improved with the increase of shearing time.But when shearing time exceed 10 min,the effect is not evident any more.The conductivity of composites is improved with the increase of CNTs content,but when it exceeds 10%,the conductivity of composites does not increase any more.