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A ENR-based conductive film integrating electricity-triggered self-healing, damage detection and high sensitivity for flexible sensors

文献类型： 外文期刊

作者： Kong, Lingli 1 ; Yang, Yunpeng 1 ; Lin, Zihao 1 ; Huang, Bai 1 ; Liao, Lusheng 2 ; Wang, Yueqiong 2 ; Xu, Chuanhui 1 ;

作者机构： 1.Guangxi Univ, Sch Chem & Chem Engn, Nanning 530004, Peoples R China

2.Chinese Acad Trop Agr Sci, Hainan Prov Key Lab Nat Rubber Proc, Agr Prod Proc Res Inst, Haikou 524001, Guangdong, Peoples R China

关键词： Electricity-triggered self-healing; Damage detection; Flexible sensors; Disulfide bonds

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：15.1； 五年影响因子：14.3 ）

ISSN： 1385-8947

年卷期： 2024 年 479 卷

页码：

收录情况： SCI

摘要： Wearable flexible sensors cannot lock damage location in time for self-healing due to a lack of damage detecting capacity, which will indulge slight damages to grow up to cause irreparable losses. To address this issue, we design a conductive film based on epoxidized natural rubber (ENR), lipoic acid (LA) and carbon nanotubes (CNT), which has electricity-triggered self-healing and damage detection capabilities for applications in flexible sensors. Due to the excellent electrothermal effect (approximate to 130 celcius in 20 V) of CNT, the film achieves a 100 % selfhealing efficiency under an applied voltage of 20 V for only 4 h. More importantly, the location of damage can be detected by the apparent color difference in the infrared thermogram caused by the different resistances between the damaged and undamaged areas under applied voltage. The film has an acceptable mechanical property of 3.36 MPa, excellent stretchability up to 479 %, and good conductivity of 0.77 S/m. Moreover, it shows high sensitivity (gauge factor up to 12.01) and good reliability (2000 cycles) in flexible sensing and can be used for human body operation detection and anti-counterfeiting. We believe that this functional film provides ideas for the development of a new generation of wearable flexible sensors integrating electricity-triggered selfhealing and damage detection.

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