Dielectric self-healing BNNS/PU nanocomposites based on DA chemistry

摘要

With the rapid development of flexible wearable devices, more requirements such as excellent mechanical property and flexibility have been put forward for dielectric materials. Herein, a dielectric boron nitride nanosheets filled polyurethane (BNNS/PU) nanocomposite with self-healing property was prepared by in-situ polymerization based on Diels-Alder (DA) reaction. The material not only possesses an enhanced dielectric performance but also exhibits excellent mechanical properties and flexibility. More importantly, a good self-healing property was achieved under a mild ambient temperature. This work provides a simple method to synthesize a self-healing dielectric nanocomposites which shows potential applications in various electronic devices.