Chemical crosslinking porous polymers prepared by thiol-ene click reaction with two-sided MXene layers for highly efficient infrared stealth

Abstract

As the capabilities of infrared detection advance, materials with a single working modes are no longer sufficient for the effect. Designing a multi-module cooperative infrared stealth composite material has become particularly important. However, materials with multiple working modules face challenges such as long procession and difficulty in integration. Therefore, we employed thiol-ene click reaction to prepare porous polymers as thermal insulation substrates, incorporated phase change microcapsules for heat absorption and temperature delay, and loaded two MXene layers at the top and bottom are low emissivity for infrared stealth and radiative heating, respectively. This sandwich-structured composite material exhibits a minimum infrared emissivity of 0.289 (3–5 μm) and 0.212 (8–14 μm), showing excellent camouflage capability for infrared thermal signals under an infrared camera, generating a temperature difference of about 61 °C with the hot target at 100 °C. Additionally, the bottom MXene layer used for radiative heating can raise the temperature of artificial skin by 2.5 °C. Furthermore, the as-prepared M28PP0.36M6 also demonstrates superior mechanical properties (300 kPa, 50 %). We believe that, due to the synergistic effects of temperature control and low emissivity, combined with advantages of facile preparation, it will become a promising candidate in the field of infrared stealth.