High strength, stable and self-healing copolyimide for defects induced by mechanical and electrical damages

Baoquan Wan; Xiaodi Dong; Xing Yang; Ming-Sheng Zheng; George Chen; Jun-Wei Zha

doi:10.1039/D2TC01605B

High strength, stable and self-healing copolyimide for defects induced by mechanical and electrical damages†

Baoquan Wan,^a Xiaodi Dong,^a Xing Yang,

^a Ming-Sheng Zheng,*^a George Chen^b and Jun-Wei Zha

*^acd

Author affiliations

* Corresponding authors

^a School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
E-mail: zhajw@ustb.edu.cn

^b Department of Electronics and Computer Science, University of Southampton, Southampton SO17 1BJ, UK

^c Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China

^d Shunde Graduate School of University of Science and Technology Beijing, Foshan 528300, P. R. China

Abstract

Self-healing of damage is a common phenomenon in organisms but is hardly ever encountered in rigid polymer materials. For next-generation electricals and electronics, it is crucial to accurately mimic organisms to detect and heal mechanical/electrical damage. Herein, disulfide bond exchange is designed to introduce the self-healing ability in a copolymerized polyimide (copolyimide). A copolyimide insulation film with two diamine monomers is successfully prepared, which also possesses good self-healing ability after being mechanical/electrical damaged. Furthermore, the self-healing copolyimide film still maintains its good Young's modulus (E) >4 GPa, high thermal stability with glass transition temperature (T_g) >190 °C, and excellent insulation property with breakdown strength (E_b) >300 kV mm⁻¹. The combination of the simple copolymerization and unique self-healing ability is suitable for high T_g polyimide to make this an ideal method for insulation field.

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DOI: https://doi.org/10.1039/D2TC01605B
Article type: Paper
Submitted: 19 Apr 2022
Accepted: 12 Jul 2022
First published: 12 Jul 2022

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J. Mater. Chem. C, 2022,10, 11307-11315

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High strength, stable and self-healing copolyimide for defects induced by mechanical and electrical damages

B. Wan, X. Dong, X. Yang, M. Zheng, G. Chen and J. Zha, J. Mater. Chem. C, 2022, 10, 11307 DOI: 10.1039/D2TC01605B

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Journal of Materials Chemistry C

High strength, stable and self-healing copolyimide for defects induced by mechanical and electrical damages†

Abstract

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High strength, stable and self-healing copolyimide for defects induced by mechanical and electrical damages

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