Infrared Stealth Sio2m Fiber@Mxene Composite Fabric Prepared by Wet Spinning And Hot-Pressing Method

Abstract

Fabric-based infrared stealth composite materials have both thermal insulation performance and low emissivity characteristics, and are suitable for fields such as infrared camouflage and thermal management. Therefore, we herein combine insulating materials with a low-emissivity coating on the fabric base prepared by wet spinning and hot-pressing method to form a multi-layer structure fabric. MXene materials are applied to the fabric surface to form a functional layer with low infrared emissivity, and the fabric uses silica aerogel microspheres (SiO2M) and gel fibers composed of fibers as the insulation layer, jointly achieving the combination of internal insulation and surface low emission. Under the heating condition of 70 °C, the thickness of this fabric is 1.263 mm and a temperature difference effect of 11 °C can be achieved. After adding SiO2M, the heat insulation temperature difference increased by 5.8 °C Its thermal conductivity is only 0.04651 W/(m·K), demonstrating excellent heat insulation performance. The infrared emissivity of the MXene coating in the 8~14 μm band is only 0.282, significantly reducing the infrared characteristic signal of the fabric. In sum, when heated to 70 °C, the radiation temperature only shows 43.4 °C, which means that the intensity of the infrared signal is significantly reduced. Therefore, this multi-layer structure fabric composite material has potential application prospects in the field of infrared stealth.

Keywords: Infrared stealth, Thermal insulation gel fiber, Hot-pressed Multilayer structure fabric, Low emissivity.