石墨烯
材料科学
数码产品
纳米技术
复合数
柔性电子器件
电导率
可穿戴技术
自愈
可穿戴计算机
复合材料
计算机科学
电气工程
化学
嵌入式系统
物理化学
病理
工程类
替代医学
医学
作者
Jinhui Li,Qiang Liu,Derek Ho,Songfang Zhao,Shengchun Wu,Lei Ling,Fei Han,Xiaoxiao Wu,Guoping Zhang,Rong Sun,Ching‐Ping Wong
标识
DOI:10.1021/acsami.7b19649
摘要
Wearable electronics with excellent stretchability and sensitivity have emerged as a very promising field with wide applications such as e-skin and human motion detection. Although three-dimensional (3D) graphene structures (GS) have been reported for high-performance strain sensors, challenges still remain such as the high cost of GS preparation, low stretchability, and the lack of ability to heal itself. In this paper, we reported a novel self-healing flexible electronics with 3D GS based on Diels–Alder (DA) chemistry. Furfurylamine (FA) was employed as a reducing as well as a modifying agent, forming GS by FA (FAGS)/DA bonds contained polyurethane with the “infiltrate-gel-dry” process. The as-prepared composite exhibited excellent stretchability (200%) and intrinsic conductivity with low incorporation of graphene (about 2 wt %), which could be directly employed for flexible electronics to detect human motions. Besides, the FAGS/DAPU composite exhibited lower temperature retro-DA response for the continuous graphene networks. Highly effective healing of the composites by heat and microwave has been demonstrated successfully.
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