Electromagnetic interference shielding with absorption-dominant performance of Ti <sub>3</sub> C <sub>2</sub> T <sub>X</sub> MXene/non-woven laminated fabrics
Hengyu Zhang, Jianying Chen, Hui Ji, Ni Wang, Shuo Feng, Hong Xiao
Abstract
Electromagnetic interference (EMI)-shielding materials with remarkable shielding effectiveness (SE) based on dominant absorption are highly desirable, especially if they are also flexible and lightweight. Herein, we prepared MXene (Ti 3 C 2 T X, T X -=O,-OH,-F)-based lightweight and absorption-dominant EMI-shielding non-woven fabrics. In view of the porosity and soft properties of textiles, as well as the unique high conductivity and hydrophilicity of Ti 3 C 2 T X MXene, Ti 3 C 2 T X MXene was coated on the fiber skeleton of three different non-woven fabrics made from polyester, cotton, and calcium alginate. The conductive layer formed by Ti 3 C 2 T X MXene on the fiber led to heterogeneous interfaces. They improved the multiple reflection of electromagnetic waves among Ti 3 C 2 T X MXene sheets and then contributed to the attenuation of the electromagnetic waves. Among all the samples, calcium alginate/Ti 3 C 2 T X MXene reached a maximum SE of 25.26 dB at 12.4 GHz with the fabric thickness of 3.17 mm. Cotton/Ti 3 C 2 T X MXene achieved maximum SSE t (ratio of specific shielding effectiveness (SSE) to thickness) of 2301.95 dB cm 2 g −1 at 1.36 mm with a loading of Ti 3 C 2 T X MXene of only 5.77mg/cm 3 . Further, fabric thickness, layer number, conductivity, and substrate type were selected to analyze the EMI-shielding mechanism.