碳纳米管涂层氨纶传感材料的性能研究  

Property research of carbon nanotube coating spandex sensing material

作　　者：张雨晴 姚明远 尹思一 刘玮[1] ZHANG Yuqing;YAO Mingyuan;YIN Siyi;LIU Wei(Shanghai University of Engineering Science,Shanghai,201620,China)

机构地区：[1]上海工程技术大学,上海201620

出　　处：《棉纺织技术》2024年第5期15-22,共8页Cotton Textile Technology

摘　　要：为了获得良好导电性和弹性的碳纳米管(CNT)氨纶复合材料,采用浸渍方法在氨纶长丝表面附着碳纳米管。使用3⁃氨基丙基三乙氧基硅烷溶液将氨基接枝在氨纶表面,再将处理后的氨纶浸入不同质量分数的羧基化多壁CNT分散液中,获得碳纳米管涂层氨纶复合传感材料。对碳纳米管氨纶材料的红外光谱图、力学性能、导电性等进行表征分析。结果表明:随着CNT质量分数的增加,氨纶表面CNT数量逐渐增加,当CNT质量分数达到7%时,氨纶表面的CNT数量明显增多且浮在表面有较多孔隙。而随着CNT涂层的形成,纱线的强度较氨纶原纱有所降低,断裂伸长也较氨纶原纱有一定程度的下降,但复合纱线仍然能保持1000%以上的断裂伸长率。当CNT质量分数从1%增加至5%时,在不同拉伸应变下,电阻的相对变化较大,说明传感纱线响应灵敏。在500次拉伸/释放循环期间,响应阻力变化的峰值和基线波动较小,传感纱线性能稳定。认为:碳纳米管涂层氨纶传感材料的响应时间快,且具有良好的应变响应稳定性,在小应变传感领域具有潜在应用。To achieve carbon nanotube spandex composite materials with superior conductivity and elasticity,carbon nanotube were adhered to the surface of spandex filament using an impregnation method.Amino groups were introduced to the spandex surface through a solution of 3-aminopropyltriethoxysilane.Subsequently,the treated spandex was immersed in dispersions of carboxylated multi-walled carbon nanotubes with varying mass fractions to create a composite sensing material with a carbon nanotube coating.The infrared spectrum,mechanical property,conductivity and so on of carbon nanotube spandex material were evaluated and analyzed.The results showed the number of CNT on the spandex surface was increased as the CNT mass fraction increased.When the CNT mass fraction was reached 7%,the number of CNT was increased significantly and accompanied by the presence of numerous pores on the surface.Despite a reduction in strength and breaking elongation compared to the original spandex yarn due to the CNT coating,the composite yarn maintained a breaking elongation ratio over 1000%.When CNT mass fraction was increased from 1%to 5%,under different tensile strains,the sensing yarn exhibited a significant relative change in resistance,which indicating a sensitive response.Throughout 500 times stretching/releasing cycles,the sensing yarn demonstrated minimal peak and baseline fluctuations in response to resistance changes,showcasing stable performance.It is considered that carbon nanotube coating spandex sensing materials exhibit a rapid response time and excellent strain response stability.It holds potential applications in the field of small strain sensing.

关 键 词：碳纳米管 氨纶 涂层 传感 化学改性 

分 类 号：TS102.6[轻工技术与工程—纺织工程]