Roll-to-roll processable MXene-rGO-PVA composite films with enhanced mechanical properties and environmental stability for electromagnetic interference shielding. Issue 17 (1st September 2022)

• Record Type: Journal Article
• Authors: Si, Yunfa; Jin, Huihui; Zhang, Qiong; Xu, Dewen; Xu, Renxin; Ding, Anxin; Liu, Dan
• Is Part Of: Ceramics international. Volume 48:Issue 17(2022)
• Page Start: 24898
• Page End: 24905
• Publication Date: 2022-09-01
• Subjects: Ti3C2TX MXene -- Nacre-mimetic structure -- Blade-casting -- Mechanical properties -- Electromagnetic interference shielding; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.05.143
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: MXene films promise potential electromagnetic interference (EMI) shielding materials, but poor scalable processability, environmental instability, and weak mechanical properties severely restrict their applications. Herein, we engineer the large-area, high-performance, and compact nacre-like MXene-based composite films through cooperative co-assembly of Ti3 C2 TX MXene and reduced graphene oxide (rGO) in the presence of polyvinyl alcohol (PVA). The resulting MXene-rGO-PVA composite films benefit from enhanced bonding strength and extra chain bridging effect of linear PVA molecules enriched with hydroxyl groups. Therefore, the composite film achieves high tensile strength (∼238 MPa) and toughness (∼1.72 MJ m −3 ) while having high conductivity of ∼32 S cm −1 . A significant EMI shielding effectiveness (41.35 dB) is also demonstrated, with an excellent absolute shielding effectiveness of ∼20, 200 dB cm 2 g −1 at only 12-μm thickness. Moreover, due to the synergistic effect of multiple components, the composite films maintain a stable EMI shielding performance in harsh environments (sonication, hot/cold annealing, and acid solution) with mechanical properties that fluctuate only within 10% compared to the original film. More importantly, commercial polyethylene terephthalate release liner can be applied for the film coating, facilitating continuous roll-to-roll production of large-area films and future applications.