摘要
石墨烯的分散状态直接影响石墨烯-水性聚氨酯柔性应变传感元件的最终性能,采用聚乙烯吡咯烷酮增强石墨烯在水性聚氨酯体系中的分散性,固定水性聚氨酯与石墨烯的复合质量比,改变聚乙烯吡咯烷酮的掺量,采用溶液共混法并结合超声分散工艺制备石墨烯-水性聚氨酯复合导电浆料及其复合导电膜。通过紫外可见分光光度计和扫描电镜对石墨烯在水性聚氨酯中的分散性进行表征。研究结果表明:聚乙烯吡咯烷酮能够有效抑制石墨烯的团聚作用,从而提高石墨烯在水性聚氨酯中的分散性;随着聚乙烯吡咯烷酮掺量增加,石墨烯分散效果明显增强,聚乙烯吡咯烷酮与石墨烯的质量掺比(质量比)为3:1时石墨烯的分散效果最佳。
The dispersion state of graphene directly affects the final performance of graphene/water-borne polyurethane flexible strain sensing element. Polyvinylpyrrolidone was used to enhance the dispersion of graphene in water-borne polyurethane system, the composite ratio of water-borne polyurethane and graphene were fixed,and the content of polyvinylpyrrolidone was changed, graphene/water-borne polyurethane composite conductive slurry and composite conductive film were prepared by solution blending and ultrasonic dispersion process. The dispersibility of graphene in water-borne polyurethane was characterized by ultraviolet-visible spectrophotometer and scanning electron microscope. The results show that polyvinylpyrrolidone can effectively prevent the aggregation of graphene, so as to improve the dispersion of graphene in water-borne polyurethane. As the content of polyvinylpyrrolidone increases, the graphene dispersion effect is significantly enhanced. When the mixing ratio of polyvinylpyrrolidone and graphene is 3:1, the dispersion effect of graphene is the best.
作者
董荣珍
冯朝阳
卫军
祝学真
刘晨语
DONG Rongzhen;FENG Zhaoyang;WEI Jun;ZHU Xuezhen;LIU Chenyu(School of Civil Engineering,Central South University,Changsha 410075,China;School of Urban Construction,Wuchang Shouyi University,Wuhan 430064,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2022年第8期2988-2995,共8页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51778628,51578547)。
关键词
柔性应变传感元件
石墨烯
水性聚氨酯
聚乙烯吡咯烷酮
分散性
flexible strain sensing element
graphene
waterborne polyurethane
polyvinylpyrrolidone
dispersibility
