碳纳米管/水性聚氨酯涂层导电纱线的制备及性能研究

Preparation and study of CNT/WPU coated conductive yarn

采用碳纳米管(CNT)/水性聚氨酯(WPU)导电油墨对蓬松多孔的涤纶拉伸变形丝进行浸渍涂层,制备了高导电碳纳米管/水性聚氨酯涂层导电纱线(CNT/WPU涂层导电纱线)。研究了不同WPU质量分数[ω(WPU)]的导电油墨和涂层次数对导电纱线导电性能的影响。结果表明,当CNT/WPU导电油墨中ω(WPU)为2%时,CNT/WPU涂层导电纱线的电导率可达2000 S/m。通过扫描电子显微镜(SEM)观察发现,WPU能够有效改善碳纳米管与纱线表面的界面结合性能,在纱线内部和表面形成均匀连续的导电通路。

Highly conductive carbon nanotube(CNT)/waterborne polyurethane(WPU)coated conductive yarn(CNT/WPUT coated conductive yarn)was prepared by impregnating the fluffy polyester draw texturing yarn with CNT/WPU conductive ink.The effects of conductive inks with different WPU contents and coating times on the conductive properties of conductive yarns were studied.The results showed that when the quality score of WPU in CNT/WPU conductive ink was 2%,the prepared CNT/WPU coated conductive yarn showed the highest conductivity and uniform yarn structure.By repeated dip-coating and drying process,the conductivity of CNT/WPU coated conductive yarn can reach 2000 S/m,which can light the small bulb easily.Scanning electron microscope observation(SEM)showed that WPU can effectively improve the interfacial bonding performance between CNTs and the yarn surface,and form uniform and continuous conductive paths inside yarn.