碳纳米管整理腈纶及其导电性的研究

Finish of acrylic fiber with carbon nanotubes and its electrical conductivity

用强酸改性多壁碳纳米管,将改性后的多壁碳纳米管用高温水浴的方法整理到腈纶上。以纤维体积比电阻为指标,通过单因素分析确定制备碳纳米管腈纶的优化工艺参数,并对其性能进行测试分析。红外光谱测试结果表明,强酸改性后的碳纳米管成功接上-COOH官能团。当溶液的pH为3,碳纳米管的质量分数为0.03%,黏合剂的用量为3 mL时,碳纳米管腈纶的体积比电阻最小。扫描电镜分析结果表明,经碳纳米管整理后的纤维表面分布有管状导电物质。机械性能测试结果表明,碳纳米管腈纶断裂强力和断裂伸长率都有所提高。TG测试结果表明,碳纳米管腈纶的热稳定性有一定的提升。

Multi-walled carbon nanotubes （MWCNTs） are treated by strong acid and then applied into acrylic fibers by a high-temperature water bath. The optimum process of carbon nanotubes acrylic fibers is determined by single factor analysis with the fiber volume resistivity as the index, and their properties are tested and analyzed. Infrared spectroscopy shows that the carbon nanotubes are successfully grafted into the -COOH functional groups. The results show that the volume resistivity of carbon nanotube acrylic fiber is the smallest when the pH value of the solution is 3, the mass fraction of carbon nanotubes is 0.03%, and the amount of binder is 3 mL. Scanning electron microscopy （SEM） shows that the surface of the fibers is distributed tubular materials after the carbon nanotubes are finished. Mechanical tests show that the breaking strength and breaking elongation of carbon nanotube acrylic fiber increase. TG test results show that the thermal stability of carbon nanotube acrylic fiber has a certain increase.