Sandwich-shaped multifunctional electromagnetic shielding material based on fiber–carbon nanotube system

Abstract

In this article, a novel flexible, wearable material with great EMI shielding performance was prepared through structuring fiber–carbon nanotube composite system. The composite possessed satisfactory heating performance and glucose-sensing characteristics, based on its excellent electrical conductivity and thermal conductivity. The carbon nanotube and epoxy resin composite material was cured by isopachous-rolling-shaping (IRS) process without sensitization. Under the optimal processing condition, the resultant sample showed a high electrical conductivity of 1.19 × 106 S m−1, the saturation magnetization of 4.83 emu/g. Surface morphologies, functional groups, and elemental analysis of composite were characterized by SEM and ATR-FTIR, respectively. Remarkably, the multilayer material exhibited favorable electromagnetic shielding performance with effectiveness of 60.9 dB (30–6000 MHz). In addition, it could stably heat up to 45 °C at a constant voltage of 3 V. Excellent electrocatalytic performance for glucose oxidation was shown in 0.1 mM NaOH solution, with the sensitivity up to 10190.35 μA mM−1 cm−2. By virtue of mutual reinforcement between multiwalled carbon nanotubes (MWNTs) and epoxy resin composites (RC), excellent electromagnetic properties and serviceability were obtained, which resulted in high durability for practical applications in electronic device engineering.