Enhanced terahertz shielding by adding rare Ag nanoparticles to Ti₃C₂T _x MXene fiber membranes

Abstract

Polyacrylonitrile/Ti3C2T x MXene/silver nanoparticles fiber membranes with different silver nanoparticles contents and thickness of porous structure have been successfully prepared by electrospinning. Through the measurement of terahertz time domain spectrum, the shielding effect of the fiber membrane with 1% silver nanoparticles content can reach up to 12 dB. Moreover, the thickness of the spinning fiber membranes is controlled by adjusting the spinning time, so as to better analyze the influence of the thickness of the shielding performance in terahertz band. We attribute this excellent phenomenon to porous structure of the spun fiber membrane and combination of Ti3C2T x MXene with few-layers and silver nanoparticles to increase the absorption and conductivity of the fiber membrane, thereby enhancing the shielding effect in terahertz range. Meanwhile, the prepared polyacrylonitrile/Ti3C2T x MXene/silver nanoparticles fiber membranes show good stability and little change in terahertz shielding effect after high temperature annealing. This may provide potential ideas about the development of high-performance terahertz shielding materials, which are of great significance of terahertz electromagnetic shielding.

Constructions and applications of MXene-based porous films

“…Zou [16] et al successfully prepared polyacrylonitrile (PAN)/MXene/silver nanoparticles (AgNPs) fiber films with diverse silver nanoparticle components and porous structure thicknesses by electrostatic spinning. The shielding effect of 1% silver nanoparticles was measured by terahertz timedomain spectrum up to 12 dB, and the prepared PAN/Ti 3 C 2 T x MXene/AgNPs fiber films showed good stability, and the terahertz shielding effect did not change much after high annealing.…”

Electrospun MXene Nanosheet/Polymer Composites for Electromagnetic Shielding and Microwave Absorption: A Review

“…Zou et al dispersed Ti 3 C 2 T x powder and silver nanoparticles (AgNPs) in a PAN solution. They successfully prepared porous composite fiber membranes embedded with Ti 3 C 2 T x and AgNPs through electrospinning technology.…”

3D Architectural MXene‐based Composite Films for Stealth Terahertz Electromagnetic Interference Shielding Performance

“…[1][2][3][4] According to previous reports, traditional EMI shielding materials can be divided into two main categories, namely, i) metals and metal matrix composites (MMCs) and ii) polymer-carbonbased composites. [4,9] However, the main drawbacks of metals and MMCs are their high specific weight, high density of defects, susceptibility to oxidation and corrosion, high cost, and low flexibility. [4,9] In this case, polymer-carbon filler composites are the best choice for vehicles and aircraft with EMI shielding due to their improved electrical conductivity, flexibility, low density, high stability (both thermal and mechanical), and interfacial boundary scattering of the incident EM waves.…”

“…[4,9] However, the main drawbacks of metals and MMCs are their high specific weight, high density of defects, susceptibility to oxidation and corrosion, high cost, and low flexibility. [4,9] In this case, polymer-carbon filler composites are the best choice for vehicles and aircraft with EMI shielding due to their improved electrical conductivity, flexibility, low density, high stability (both thermal and mechanical), and interfacial boundary scattering of the incident EM waves. [3] Traditional polymer-carbon-based composites show high absorption-based EMI shielding effectiveness (SE); however, they are unfavorable at terahertz bandwidth absorption, and the processing difficulties of carbon material with solvent cause agglomeration of carbon structures and bonding with host due to the lack of functional groups.…”

“…[3] Traditional polymer-carbon-based composites show high absorption-based EMI shielding effectiveness (SE); however, they are unfavorable at terahertz bandwidth absorption, and the processing difficulties of carbon material with solvent cause agglomeration of carbon structures and bonding with host due to the lack of functional groups. [3,9] In general, EMI shielding with frequency selective surface (FSS) is a popular design strategy for achieving strong shielding efficiency in the specific resonance bandwidth frequency. [1,14] Recently Hlaing et al [1] designed a carbon-based 3D pyramidal periodic architecture for improved FSS terahertz shielding with plasmonic enhancements.…”