功能化碳纳米管复合薄膜及其膜卷纱的电热性能

碳纳米管(CNT)具有优异的电学性能,为了更好地将其应用于纺织品加热领域,采用加捻CNT薄膜的方法制备膜卷纱,并通过预喷涂导电聚合物聚(3,4-乙烯二氧噻吩):聚(苯乙烯磺酸盐) (PEDOT:PSS)溶液的方式进一步优化CNT膜卷纱的电热性能;随后分析PEDOT:PSS喷涂浓度对CNT薄膜及其膜卷纱的结构和导电性能的影响,以及施加不同电压条件下CNT薄膜及其膜卷纱的温度变化。结果表明:随着PEDOT:PSS质量分数从0.01%增加至1.4%,所喷涂的CNT薄膜电导率由344.2 S/cm逐渐增大至668.9 S/cm;当PEDOT:PSS质量分数为0.07%时,所制备的CNT复合膜卷纱具有优异的电热性能,当在其两端施加电压时,温度可到达214 ℃,响应时间为5 s,发热温度是其未加捻薄膜的1.6倍,具有较好的应用潜力和开发价值。

Electrothermal properties of functionalization carbon nanotube composite films and films twisted yarns

Carbon nanotubes(CNT) have excellent electrical properties. In order to better applied it's performance to electrothermal fabric, the CNT films twisted yarn was prepared by twisting CNT film. The electrothermal properties of the yarn was further optimized by pre-spraying poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT:PSS)solution. The influence of the solution concentration on the structure and conductivity of CNT film and its films twisted yarns were studied, as well as the temperature changes of CNT film and its films twisted yarns under different applied voltage. As the PEDOT:PSS mass fraction increased from 0.01% to 1.4%, the conductivity of the sprayed CNT film gradually increased from 344.2 S/cm to 668.9 S/cm. When the electric voltage was applied across it, the spinning temperature of PC films twisted yarns can reach 214 ℃ with a response time of 5 s, which is 1.6 times of its untwisted films. That's indicates the good application potential and development value of the PEDOT:PSS/CNT film twisted yarn.