Bio-inspired self-healing flexible films with pomegranate-shaped nanosphere loaded graphene for electromagnetic interference shielding and superhydrophobicity performances. Issue 45 (10th November 2022)

• Record Type: Journal Article
• Authors: Zhou, Jianlin; Yuan, Zhonghua; Liu, Han; He, Weixing; Yu, Kejing; Chen, Kunlin
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 45(2022)
• Page Start: 24331
• Page End: 24344
• Publication Date: 2022-11-10
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d2ta05088a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Inspired by the pomegranate structure and gecko feet, a multi-stimuli self-healing flexible film with EMI shielding and superhydrophobicity was fabricated, which produces a long-term stable performance in a complicated outdoor environment. Abstract : A self-healing strategy is an urgent requirement for extending the service life of the electromagnetic interference (EMI) shielding films. In this study, the multi-stimuli self-healing flexible films with EMI shielding and self-cleaning properties were prepared by using bionic pomegranate-shaped magnetic nanosphere loaded graphene sheets (PMNs-FG) and pyrene-grafted multi-branched polyurethane (MPU). Due to the unique structure of PMNs-FG, the fabricated PMNs-FG/MPU composite film exhibits excellent EMI shielding effectiveness and self-cleaning ability. Interestingly, inspired by geckos' feet, the pyrene groups of MPU can stick to the surface of graphene via π–π interaction, which allows the damaged film to completely self-heal. The repaired film can recover its initial EMI shielding efficiency and superhydrophobicity. Moreover, owing to the great photothermal and electrothermal properties, the self-healing process can be triggered by solar irradiation or electricity except for the direct heating, broadening the application prospects of self-healing materials and providing a novel approach for the fabrication of durable functional films.