Self‐Healable Elastomeric Network with Dynamic Disulfide, Imine, and Hydrogen Bonds for Flexible Strain Sensor. Issue 21 (9th March 2023)

• Record Type: Journal Article
• Authors: Zeng, Wangyi; Deng, Longjiang; Yang, Guang
• Is Part Of: Chemistry. Volume 29:Issue 21(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2023-03-09
• Subjects: dynamic covalent bonds -- flexible strain sensor -- human motion detection -- polysiloxane elastomer -- self-healing; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.202203478
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: Self‐healable and stretchable elastomeric material is essential for the development of flexible electronics devices to ensure their stable performance. In this study, a strain sensor (PIH2 T1 ‐tri/CNT‐3) composed of self‐repairable crosslinked elastomer substrate (PIH2 T1 ‐tri, containing multiple reversible repairing sites such as disulfide, imine, and hydrogen bonds) and conductive layer (carbon nanotube, CNT) was prepared. The PIH2 T1 ‐tri elastomer had excellent self‐healing ability (healing efficiency=91 %). It exhibited good mechanical integrity in terms of elongation at break (672 %), tensile strength (1.41 MPa). The Young's modulus (0.39 MPa) was close to that of human skin. The PIH2 T1 ‐tri/CNT‐3 sensor also demonstrated an effective self‐healing function for electrical conduction and sensing property. Meanwhile, it had high sensitivity (gauge factor (GF)=24.1), short response time (120 ms), and long‐term durability (4000 cycles). This study offers a novel self‐healable elastomer platform with carbon based conductive components to develop flexible strain sensors towards high performance soft electronics. Abstract : A strain sensor (PIH2 T1 ‐tri/CNT‐3) composed of self‐repairable crosslinked elastomer substrate and conductive layer was prepared. The PIH2 T1 ‐tri elastomer had excellent self‐healing ability and good mechanical integrity. The PIH2 T1 ‐tri/CNT‐3 sensor had high sensitivity, short response time, and long‐term durability.