Transparent electromagnetic shielding film has great application requirements in communication equipment, medical equipment, instrumentation, aerospace and other fields, attracting widespread attention. However, in the current transparent shielding materials, it is difficult to achieve both high light transmittance and high shielding effectiveness. Therefore, it is of great significance to study methods for maintaining high light transmittance with high electromagnetic shielding efficiency.
Silver nanowire (AgNW) is a new type of one-dimensional conductive material, which combines the ultra-high conductivity of silver and the scale effect of nanomaterials, so it is often used as a conductive skeleton in composite materials. The network structure film composed of AgNW has certain conductive properties and at the same time allows the transmission of visible light. Therefore, the AgNW film can be used for transparent conductive films. However, the overlap between the AgNW has a large contact resistance, which leads to poor conductivity of the AgNW film. , Affecting its application in the field of electromagnetic shielding.
MXene is a new type of two-dimensional transition metal carbides and carbonitrides. It has metal-like high electrical conductivity and abundant functional groups. It is very suitable for applications such as sensing and electromagnetic shielding. However, because MXene has a strong absorption effect on visible light, the pure MXene film has a poor shielding performance and poor light transmission performance.
In order to reconcile the contradiction between light transmittance and shielding performance, Professor Yu Zhongzhen and Professor Zhang Haobin of Beijing University of Chemical Technology recently reported a multi-scale design of Ti3C2Tx MXene/AgNW transparent conductive film, which has high light transmittance and high Electromagnetic shielding and sound sensing function. The research results were published in "ACS NANO" under the title of "Flexible, Transparent, and Conductive Ti3C2Tx MXene-Silver Nanowire Films with Smart Acoustic Sensitivity for High-Performance Electromagnetic Interference Shielding"