Infrared stealth property study of mesoporous carbon-aluminum doped zinc oxide coated cotton fabrics

Abstract

Low-emitting cotton fabric with low infrared emissivity near to 0.795 at the wavebands of 8–14 µm was prepared using mesoporous carbon-aluminum doped zinc oxide (C-AZO) coatings. The effects of binders, the content of C-AZO composites, coating thickness and roughness of fabrics on the infrared emissivity were investigated. Results showed that the emissivity firstly decreased, and then gradually reached a stable and lowest value as the content of C-AZO composites and coating thickness increased. The lowest infrared emissivity of coated fabric was obtained when the content of C-AZO composites was around 40 wt% with coating thickness over 300 µm. Moreover, infrared transparent binders and a smooth surface were found to reduce the infrared emissivity. The coated fabric with infrared emissivity of 0.795 could be matched in the surroundings of withered grass or rock under the condition of no sunshine.

Preparation and characteristics of polymer matrix composite coatings with low infrared emissivity and high‐temperature resistance

“…Therefore, reducing the infrared emissivity of the target is an effective method for achieving infrared stealth. [8][9][10][11] In recent years, several lowinfrared-emissivity materials, such as semiconductors, [12,13] photonic crystals, [14,15] conducting polymers, [16,17] and organic/inorganic composites [18,19] have been developed. Among these materials, resin/metal composite coatings play an important role in infrared stealth owing to their low infrared emissivity, manufacturing convenience, excellent engineering performance, and low price.…”

Far-infrared emissive polypropylene/wood flour wood plastic composites: Manufacturing technique and property evaluations

“…31 Wang et al coated cotton fabrics with mesoporous carbon-aluminum doped zinc oxide (C-AZO) and found that a coating layer of 40 wt% C-AZO and a thickness of 300 mm provided the fabrics with a far-infrared emissivity of 0.79. 32 According to these literature sources, most far-infrared emissive products are in the form of fabrics. Therefore, this study uses PP, WF, and far-infrared masterbatches to make wood plastic composites with far-infrared emissivity, the function of which can be further used in the construction industry, for health care equipment, and for daily applications for the human body.…”

Low infrared emissivity composite materials for multi-band camouflage

“…First of all, from the perspective of textile materials, there are mainly the following methods: developing new low emissivity fibers, [10][11][12][13] modifying existing fibers, [14][15][16] and designing special structures of fabrics. [17][18][19] Secondly, considering the exterior of textile materials, other materials with infrared camouflage function can be physically arranged on the surface of the fabric, such as low infrared emissivity coating, [20][21][22][23] heat insulation and temperature control coating. [24][25][26][27][28] In addition, with the continuous progress of multi-band detection technology and antiinfrared camouflage technology, multifunctional textile materials (for example, the material has infrared camouflage performance and visible light camouflage 29 / electromagnetic absorption [30][31][32] function at the same time) and infrared adaptive textile materials [33][34][35] (which can automatically adjust the infrared emissivity according to the infrared radiation characteristics of the environment) have also attracted much attention.…”