Colorless polyimides with excellent optical transparency and self-healing properties based on multi-exchange dynamic network

Young Nam Kim, Juheon Lee, Young O. Kim, Jaewoo Kim, Haksoo Han, Yong Chae Jung

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Colorless polyimides (CPIs) with outstanding mechanical properties are used as essential materials in the production of future flexible display panels, foldable windows, and spacecraft cockpit materials. However, under repetitive stress and deformation, fatigue fractures caused by cracks and radio waves may act as critical determinants of the properties and duration of the material. To solve this problem, the present study developed a CPI capable of self-healing, wherein the transparency and any damage caused by external stress are rapidly and easily restored. Our synthesized CPI films showed ultra-transmittance (> 95%) and excellent self-healing efficiency (> 98%) with a simultaneously induced multi exchange network. Notably, the films exhibited excellent mechanical properties even after a bending fatigue test involving more than 10,000 cycles. This study therefore suggests a new type of CPI with a self-healing function and shows that the trade-off between the durability and functionality can be completely resolved.

Original languageEnglish
Article number101226
JournalApplied Materials Today
Volume25
DOIs
Publication statusPublished - 2021 Dec

Bibliographical note

Publisher Copyright:
© 2021 Elsevier Ltd

All Science Journal Classification (ASJC) codes

  • General Materials Science

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