Ultralight and Multifunctional CNT/CNF Aerogels with Excellent EMI Shielding and Photothermal Conversion Properties

Abstract

Modern communications infrastructure has given rise to significant levels of electromagnetic wave interference (EMI), leading to increased requirements for the preparation of multifunctional EMI shielding composites. Ti3C2TX aerogels are well-studied materials to achieve this, with the abundant functional groups of hydroxylated nanocellulose able to achieve sufficient electromagnetic wave attenuation. This article reports that samples of NC/35C/25M6 achieved an EMI SE of 30.3 dB and an SSE/t of 2346 dB cm2g−1 using 1.15 g of conductive fillers with a density of only 0.06 g/cm3. In addition, the photothermal conversion properties of this material contribute to efficient energy utilization, demonstrating the multiple functionality of Ti3C2TX aerogels. Therefore, these ultralight, low-cost and multifunctional aerogels meet the requirements of EMI shielding and photothermal conversion, providing a valuable method for the fabrication of EMI shielding composites.