A Lightweight, Elastic, and Thermally Insulating Stealth Foam With High Infrared‐Radar Compatibility

Abstract

The development of infrared-radar compatible materials/devices is challenging because the requirements of material properties between infrared and radar stealth are contradictory. Herein, a composite of poly(3, 4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) coated melamine foam is designed to integrate the advantages of the dual materials and the created heterogeneous interface between them. The as-designed PEDOT:PSS@melamine composite shows excellent mechanical properties, outstanding thermal insulation, and improved thermal infrared stealth performance. The relevant superb radar stealth performance including the minimum reflection loss value of −57.57 dB, the optimum ultra-wide bandwidth of 10.52 GHz, and the simulation of radar cross section reduction value of 17.68 dB m 2 , can be achieved. The optimal specific electromagnetic wave absorption performance can reach up as high as 3263.02 dB•cm 3 g −1 . The average electromagnetic interference shielding effectiveness value can be 30.80 dB. This study provides an approach for the design of high-performance stealth materials with infrared-radar compatibility.

Bioinspired Carbon Superstructures for Efficient Electromagnetic Shielding

“…4−6 Inspired by natural superstructures such as fly's compound eyes, butterfly's wing scales, and honeycomb, the candidates are used as raw materials to prepare EM shielding metamaterials (Figure 1) by various methods including photolithography, nanoindentation, and 3D printing. 7,8 However, metals and alloys are normally expensive, heavy, and prone to corrosion, inducing poor performance stability and limited application scenarios. The types and electrical conductivity of conductive polymers are limited, making them translucent to EMWs when used alone.…”

“…Developing high-performance EM shielding materials is the key to realize EM shielding in the new era. These materials should be with advantages of light weight, easy processing, low cost, and good shielding capacity. , In decades, a large number of materials have been studied as EM shielding candidates including metals, alloys, conductive polymers, carbon-based materials, and Mxenes. − Inspired by natural superstructures such as fly’s compound eyes, butterfly’s wing scales, and honeycomb, the candidates are used as raw materials to prepare EM shielding metamaterials (Figure ) by various methods including photolithography, nanoindentation, and 3D printing. , …”

Green, Sustainable Architectural Bamboo with High Light Transmission and Excellent Electromagnetic Shielding as a Candidate for Energy-Saving Buildings

“…The increasingly deteriorating electromagnetic environment not only endangers people’s health, but also interferes with the normal operation of all types of electronic equipment. Therefore, it is essential to study electromagnetic shielding materials used in buildings and homes [ 51 ]. To further explore the application potential of translucent whole bamboo materials in other fields, an electromagnetic shielding film covering was used.…”

Broadband and High-Efficiency Microwave Absorbers Based on Pyramid Structure

“…Generally, the absorbing materials used in anechoic chambers require higher absorptivity and wider absorption bandwidth. The structural design of microwave-absorbing materials is one of the most effective methods. − For example, porous structure, , honeycomb, pyramid, − hollow pyramid, etc., have been employed in the electromagnetic wave field due to their structural advantages . At present, the processing technology of structural microwave-absorbing materials includes direct three-dimensional (3D) printing molding, model impregnation with microwave-absorbing slurry, one-step injection molding, foaming molding, and so on.…”