物理化学学报 >> 2015, Vol. 31 >> Issue (10): 1991-1996.doi: 10.3866/PKU.WHXB201509073

材料物理化学 上一篇    下一篇

不同分子量木质素磺酸钠对多壁碳纳米管分散性能的影响

叶晃青1,邓永红1,严燕2,张美杰2,钱勇1,邱学青1,*()   

  1. 1 华南理工大学化学与化工学院,广州510640
    2 天奈(镇江)材料科技有限公司,江苏镇江212000
  • 收稿日期:2015-07-02 发布日期:2015-10-10
  • 通讯作者: 邱学青 E-mail:xueqingqiu66@163.com
  • 基金资助:
    国家自然科学基金(21436004);国家自然科学基金(21374032)

Influence of Soldium Lignosulfonate with Different Molecular Weights on the Dispersion of Multiwalled Carbon Nanotubes

Huang-Qing. YE1,Yong-Hong. DENG1,Yan. YAN2,Mei-Jie. ZHANG2,Yong. QIAN1,Xue-Qing. QIU1,*()   

  1. 1 School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
    2 Cnano (Zhenjiang) Technology Limited, Zhenjiang 212000, Jiangsu Province, P. R. China
  • Received:2015-07-02 Published:2015-10-10
  • Contact: Xue-Qing. QIU E-mail:xueqingqiu66@163.com
  • Supported by:
    The project was supported by the National Natural Science Foundation of China(21436004);The project was supported by the National Natural Science Foundation of China(21374032)

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摘要：

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.

关键词: 木质素磺酸盐, 分子量, 碳纳米管, 吸附, 分散

Abstract:

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.

Key words: Lignosulfonate, Molecular weight, Carbon nanotube, Adsorption, Dispersion