修饰后多壁碳纳米管的分散性对比及其应用研究  

The dispersibility and applications of modified multi-walled carbon nanotubes

作　　者：程晓圆 孙晓刚[1,2] 庞志鹏[1] 付琦[1] 

机构地区：[1]南昌大学机电工程学院,江西南昌330031 [2]南昌大学(宜春)锂电及新能源汽车研究院,江西宜春336000

出　　处：《现代化工》2015年第6期87-90,共4页Modern Chemical Industry

基　　金：国家自然科学基金(60661001);江西省科技厅科研项目(2012ZBBE50012);江西省教育厅(KJLD13006)

摘　　要：通过化学处理方式分别对碳纳米管进行酸化和胺化改性,处理后的碳纳米管溶于水进行超声、剪切等步骤制成相应的分散液并进行分散性对比。然后将该分散液与纸浆混合,经高速剪切制成可运用于电子器件的碳纳米管导电纸。利用红外光谱仪、扫描电子显微镜、矢量网络分析仪对其进行表征。结果表明,该实验方法能成功改性碳纳米管,在其末端引入羧基或酰胺基,经过酸化后的碳纳米管具有较好的分散性,能保持25 d才沉淀完全,酸化后的碳纳米管导电纸与胺化后的导电纸都具有良好的屏蔽性能,将该导电纸用于电池集流体代替传统的石墨时,最多可以提高电池的50.56%电压放电时间,为改善电池的放电性能提供了新的依据。The acidified and amine-modified carbon nanotubes are dissolved into water through ultrasonic, shear and centrifugation methods. Their dispersibility is compared as well. Subsequently, a carbon nanotube conductive paper is prepared by mixing the dispersion with pulp. Infrared spectrometer, scanning electron microscopy and shielding effectiveness are used to characterize the carbon nanotube conductive paper. The result shows that the carboxyl group or an amide groups can be successfully introduced to the end of carbon nanotubes. The acidified carbon nanotubes have a good dispersion for 25 days. The MWCNTs-COOH conductive paper and MWCNTs-ODA conductive paper have preferable shielding effectiveness. The discharge capacity of Zinc manganese battery can be improved by 50. 56% when the carbon nanotubes conductive paper has taken the place of graphite as the cathode current collector. This provides a new idea for improving discharge performance of a battery.

关 键 词：碳纳米管改性 分散性 碳纳米管导电纸 电磁屏蔽性能 电池性能 

分 类 号：O631[理学—高分子化学]