CoNi/MXene/Cotton Fiber-Based Nonwoven Fabric for Efficient Microwave Absorption
Chunhui Chen, Wei Jiang, Yiqun Fu, Lu Shi, Qiang Ji, Zhijiang Li and Duo Xu*
Abstract
The rapid advancement of communication technology, coupled with the increasing severity of electromagnetic pollution, has driven the development of high-performance microwave absorbing materials. In this study, a cotton fiber-based fabric coated with Co-Ni alloy and Ti3C2Tx MXene (CFMXSM) was prepared for efficient microwave absorption. Due to the excellent electromagnetic properties of Co-Ni/MXene and the three-dimensional porous structure of the cotton fabric, electromagnetic waves can be attenuated through various mechanisms including dielectric loss, magnetic loss, and multiple reflection loss. By controlling the chemical plating time of Co-Ni and optimizing impedance matching, effective absorption of electromagnetic waves was achieved. With an MXene concentration of 10 mg/ mL, a dipping time of 5 minutes, and a chemical plating time of 15 minutes, the 2.6 mm-thick fabric achieved a reflection loss (RL) of -53.4 dB in the X-band (8.2–12.4 GHz), with an effective absorption bandwidth (RL < -10 dB) covering the entire frequency range. At a thickness of 2.2 mm, the X-band RL reached an excellent value of -64.5 dB. Thus, the fabricated CFMXSM hybrid demonstrates promising potential for applications in the electromagnetic wave protection industry.
