Journal
CHINESE JOURNAL OF CHEMISTRY
Volume 41, Issue 17, Pages 2125-2131Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cjoc.202300011
Keywords
Sol-gel processes; Thin films; Sustainable chemistry; Polyimide thermoset; Dynamic covalent bond; Recyclable polymers; EMI shielding
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Malleable conductive poly(imide-imine) hybrid (PIIH) vitrimer-graphene aerogel (GA) composites with good mechanical strength, reprocessability, and conductivity have been prepared. These composites show potential for use in flexible and stretchable electronics.
Although polyimides (PIs) have shown great potential for a broad range of applications, it remains very challenging to achieve the malleability, rehealability and recyclability for PIs and their composites targeting various applications, particularly for the rapidly emerging flexible and stretchable electronics. Herein, malleable conductive poly(imide-imine) hybrid (PIIH) vitrimer-graphene aerogel (GA) composites have been prepared, for the first time, via simple sol-gel film formation followed by heat-press. The resulting PIIH-GA composites exhibit not only the highly desired properties of thermosetting (strong mechanical strength) and thermoplastic (reprocessability) polymers, but also good conductivity enabled by the GA filler. PIIH3-GA-10 (with 10 wt% GA) showed one of the highest electrical conductivities (26.7 S/m) for PI-based composites, as well as good electromagnetic interference (EMI) shielding performance. Moreover, the PIIH-GA films could maintain good performance during stretching and even after chemical recycling, which opens new opportunities for flexible and sustainable electronics development.
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