碳纤维的表面处理与成纸导电性能

Surface Treatment of Carbon Fiber and Conductive Properties of Paper

研究氧化改性、偶联处理和分散剂对碳纤维的分散和结合性能的影响,分析不同碳纤维配比与成纸物理强度和导电性能的关系。通过纤维分析仪图像考察处理后纤维表面的形态,浆料的Zeta电位和吸光度来反映纤维的分散性能。结果表明:偶联改性能显著改善碳纤维的分散性能,并优于氧化改性,分散性能的提高可增加碳纤维网络的导电性,四种表面活性剂中CPAM的效果最佳,碳纤维含量30%时达到导电材料的"渗滤阈值"。

The influences of the oxidative modification, coupling treatment and dispersing agent for carbon fiber dispersion and binding properties were investigated, and the relationships of different ratio of carbon fiber with the physical strength and electrical conductivity of the paper were analyzed. Meanwhile fiber surface morphology, zeta potential and absorbance were tested. The result showed that： coupling modification significantly improved the dispersion performance of carbon fiber, superior than oxidative modification, the increase of the dispersion would enhance the conductivity of carbon fiber network, the effect of CPAM was best in four kinds of surface-active agent, and 30% content of carbon fiber achieved the ＂percolation threshold＂ of conductive material.