Electromagnetic Shielding by MXene-Graphene-PVDF Composite with Hydrophobic, Lightweight and Flexible Graphene Coated Fabric

• Published in: Materials Vol. 11; no. 10; p. 1803
• Main Authors: Raagulan, Kanthasamy, Braveenth, Ramanaskanda, Jang, Hee Jung, Seon Lee, Yun, Yang, Cheol-Min, Mi Kim, Bo, Moon, Jai Jung, Chai, Kyu Yun
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI 22.09.2018; MDPI AG
• Subjects: composite; EMI shielding; fabric; graphene; MXene; composite; fabric; graphene; MXene; EMI shielding
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma11101803

MXene and graphene based thin, flexible and low-density composite were prepared by cost effective spray coating and solvent casting method. The fabricated composite was characterized using Raman spectroscopy, X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and energy dispersive X-ray (EDX). The prepared composites showed hydrophobic nature with higher contact angle of 126°, -43 mN·m wetting energy, -116 mN·m spreading Coefficient and 30 mN·m lowest work of adhesion. The composites displayed excellent conductivity of 13.68 S·cm with 3.1 Ω·sq lowest sheet resistance. All the composites showed an outstanding thermal stability and constrain highest weight lost until 400 °C. The MXene-graphene foam exhibited excellent EMI shielding of 53.8 dB (99.999%) with reflection of 13.10 dB and absorption of 43.38 dB in 8⁻12.4 GHz. The single coated carbon fabric displayed outstanding absolute shielding effectiveness of 35,369.82 dB·cm²·g . The above results lead perspective applications such as aeronautics, radars, air travels, mobile phones, handy electronics and military applications.