Ultrathin, Lightweight, and Flexible CNT Buckypaper Enhanced Using MXenes for Electromagnetic Interference Shielding

Abstract

Lightweight, flexibility, and low thickness are urgent requirements for next-generation high-performance electromagnetic interference (EMI) shielding materials for catering to the demand for smart and wearable electronic devices. Although several efforts have focused on constructing porous and flexible conductive films or aerogels, few studies have achieved a balance in terms of density, thickness, flexibility, and EMI shielding effectiveness (SE). Herein, an ultrathin, lightweight, and flexible carbon nanotube (CNT) buckypaper enhanced using MXenes (Ti3C2Tx) for high-performance EMI shielding is synthesized through a facile electrophoretic deposition process. The obtained Ti3C2Tx@CNT hybrid buckypaper exhibits an outstanding EMI SE of 60.5 dB in the X-band at 100 μm. The hybrid buckypaper with an MXene content of 49.4 wt% exhibits an EMI SE of 50.4 dB in the X-band with a thickness of only 15 μm, which is 105% higher than that of pristine CNT buckypaper. Furthermore, an average specific SE value of 5.7 × 104 dB cm2 g−1 is exhibited in the 5-μm hybrid buckypaper. Thus, this assembly process proves promising for the construction of ultrathin, flexible, and high-performance EMI shielding films for application in electronic devices and wireless communications.

Structural Design Strategies of Polymer Matrix Composites for Electromagnetic Interference Shielding: A Review

“…Therefore, there is an urgent need for high-efficiency EMI shielding materials to attenuate electromagnetic waves to protect the normal operation of electronic equipment and human health. In this context, devoting to the development of various high-performance EMI shielding materials has become a research hotspot [ 4 – 6 ].…”

“…In this context, devoting to the development of various highperformance EMI shielding materials has become a research hotspot [4][5][6].…”

Flexible and Waterproof 2D/1D/0D Construction of MXene-Based Nanocomposites for Electromagnetic Wave Absorption, EMI Shielding, and Photothermal Conversion

“…Li et al manufactured Ti 3 C 2 T x MXene@graphene oxide aerogel microspheres by rapid freezing assisted electrostatic-spinning, which exhibited a low filler loading, a thin thickness, and a strong reflection loss [16]. Among them, one-dimensional (1D) carbon nanotubes (CNTs) with high conductivity, mechanical reliability, lightweight were integrated with MXene to assemble MXene/CNTs composites for efficiently shielding the electromagnetic waves [4,17,18] and absorbing electromagnetic wave [19]. Moreover, due to their high Snoek's limit, conductivity, strong anisotropy field, and high saturation magnetization, zero-dimensional (0D) magnetic nanoparticles (MNP) were widely used in electromagnetic wave absorbing and EMI shielding [20][21][22][23][24].…”

Direct Ink Writing of Highly Conductive MXene Frames for Tunable Electromagnetic Interference Shielding and Electromagnetic Wave-Induced Thermochromism

“…Two-dimensional (2D) Ti 3 C 2 T x MXene is firstly applied for electromagnetic interference (EMI) shielding in 2016 on the basis of its outstanding electrical conductivity, abundant surface hydrophilic functional groups, large specific surface area, and ease of process [2]. Till now, various MXene films [3,4], wearable fabrics [5,6], as well as multifunctional composites [7,8] are developed with excellent EMI shielding performances. Three-dimensional (3D) EMI shielding materials are usually designed with layer-by-layer, porous, or isolated internal structures to attenuate electromagnetic waves effectively by their conductive or magnetic components [9,10].…”