Interface sintering engineered superhydrophobic and durable nanofiber composite for high-performance electromagnetic interference shielding. (30th January 2022)

• Record Type: Journal Article
• Authors: Zhang, Lulu; Luo, Junchen; Zhang, Shu; Yan, Jun; Huang, Xuewu; Wang, Ling; Gao, Jiefeng
• Is Part Of: Journal of materials science & technology. Volume 98(2022)
• Page Start: 62
• Page End: 71
• Publication Date: 2022-01-30
• Subjects: Carbon nanofibers -- Silver nanoparticles -- Superhydrophobic -- Conductive -- Electromagnetic interference shielding; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2021.05.014
• Languages: English
• ISSNs: 1005-0302

Abstract

Highlights: A superhydrophobic nanofiber composite with dual conductive network is prepared. "Photo-thermally induced interfacial sintering" improves the interfacial interaction. "Photo-thermally induced interfacial sintering" enhances both the mechanical properties and electrical conductivity. The nanofiber composite possesses excellent durability. The nanofiber composite exhibits a high EMI SE and specific SE of 59.4 dB and 333.9 dB mm −1 . Abstract: Electrically conductive fibric composites (CFCs) have been widely used as electromagnetic interference (EMI) shielding materials; however, it is still difficult to achieve combination of strong interfacial adhesion, outstanding water proof performance, multi-functionality and superb EMI shielding performance for the CFCs. Herein, we report a novel "photo-thermally induced interfacial sintering" method to prepare flexible and superhydrophobic CFCs with excellent interfacial adhesion. The CFC possesses dual conductive network composed of carbon nanofiber and silver nanoparticles (AgNPs), and a conductivity of 112.1 S/cm, imparting to the material excellent Joule heating performance, revealing an large SE and SSE (59.4 dB and 333.9 dB mm −1 ) of the CFC in the X band, respectively. In addition, the CFC can maintain its superhydrophobicity, high conductivity and excellent EMI shielding performance after cyclic abrasion, stretching and ultrasonication washing. This "interfacial sintering" strategy provides a new way to fabricating multi-functional and durable conductive polymer composite.