【作者】 李善霖； 田晶晶； 孙梅洁； 赵素玲； 陈志宏；

【Author】 Shanlin Li;Jingjing Tian;Meijie Sun;Suling Zhao;ZhiHong Chen;State Key Laboratory of Advanced Technology for Materials Synthesis and Processing;School of Science, Wuhan University of Technology;

【机构】 武汉理工大学材料复合新技术国家重点实验室； 武汉理工大学理学院；

【摘要】 基于石墨烯导电纤维的柔性导体在可穿戴式电子器件和柔性生物电子器件中具有广泛的应用,但目前该类石墨烯导电纤维的制备方法较为复杂。为此,本文提出用聚多巴胺对静电纺丝聚合物纳米纤维进行表面改性,利用其与氧化石墨烯的静电吸附作用,构建一种液相反应用于简易制备石墨烯导电纳米纤维。主要研究多巴胺对苯乙烯-丁二烯-苯乙烯嵌段共聚物纳米纤维的表面改性原理,特别是对聚合物纳米纤维表面电荷属性及电荷量的调控规律,探索氧化石墨烯在静电吸附机制下在纤维表面的吸附动力学,研究多巴胺改性对石墨烯柔性导体性能的影响规律。结果表明,聚多巴胺颗粒能够较快的在纤维表面生成,但随着反应时间的增加,其逐渐以异相成核的方式填满聚合物纤维网络。经多巴胺改性后,聚合物纤维膜由疏水性变为亲水性,并且表面呈电正性。此外,氧化石墨烯能够较快的吸附在纳米纤维表面,经氢碘酸还原后,获得了具有较好弯曲、拉伸变形能力的柔性导电薄膜。更多还原

【Abstract】 This paper demonstrates the preparation approach of graphene nanofibers and their flexible conductor based on the electrostatic interaction between graphene oxide flakes and polydopamine. The results showed that polymerization of dopamine occurred immediately after the contact of polymer nanofibers with dopamine solution. With the increase of reaction time, the nanofiber mat would be covered gradually by polydopamine particles. Also, the nanofiber mat after polydopamine modification exhibited strong positive zeta potential. Mixing of graphene oxide solution with surface modified nanofiber resulted in the adsorption of graphene oxide flakes on nanofibers. After treatment by hydriodic acid, a flexible conductor based on reduced graphene oxide was achieved, which showed good bending, stretching and cyclic performances.更多还原