研究了不同分子量级分的木质素磺酸钠(SLS)在多壁碳纳米管(MWCNTs)上的吸附特征及其对分散性能的影响.不同级分的SLS及其对MWCNTs的分散性能通过凝胶渗透色谱(GPC),紫外-可见(UV-Vis)光谱、元素分析、傅里叶变换红外(FT-IR)光谱、zeta电位、扫描电子显微镜(SEM)来表征.结果表明,分子量较大的SLS级分中芳香环含量较高,其与MWCNTs之间的π-π作用更强,在MWCNTs上的吸附量大,表现出最佳的分散性能,所分散的MWCNTs的电阻率最小,导电性能较佳. The influence of sodium lignosulfonate (SLS) fractions with different molecular weights on the adsorption characteristics of multi-walled carbon nanotubes (MWCNTs) and their dispersion performance was studied using gel permeation chromatography (GPC), UV-Vis spectroscopy, elementary analysis, Fourier transform infrared (FT-IR) spectroscopy, zeta potential analysis, and scanning electron microscopy (SEM). The results indicate that SLS with higher molecular weight disperse MWCNTs better and that dispersed MWCNTs exhibit lower specific resistance and increased conductivity. It is supposed that SLS fraction with higher molecular weight has more aromatic rings, thus accounting for stronger π-π interactions with MWCNTs and increased adsorption amount
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