文献类型：期刊文献

英文题名：Asymmetric Al/Bi₂O₃/WPU composite foam with low emissivity and thermal insulation performance for high-efficiency infrared stealth

作者：Wang, Yu[1];Chang, Yuqi[2];Wang, Wei[2];Du, Chengjie[1];Song, Xiyu[1];Qian, Hongfei[1];Yu, Dan[2,3]

机构：[1]Shaoxing Univ, Key Lab Clean Dyeing & Finishing Technol Zhejiang, Shaoxing Key Lab High Performance fiber & Prod, Shaoxing 312000, Peoples R China;[2]Donghua Univ, Coll Chem & Chem Engn, Shanghai 201620, Peoples R China;[3]2999 North Renmin Rd, Shanghai 201620, Peoples R China

年份：2024

卷号：683

外文期刊名：COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

收录：SCI-EXPANDED(收录号：WOS:001145863200001)、、WOS

基金：The research was supported by Zhejiang Provincial Natural Science Foundation of China under Grant No. LQ23E030007.

语种：英文

外文关键词：Asymmetric composite foam; Infrared stealth; Low infrared emissivity; Thermal insulation

外文摘要：High-efficiency infrared stealth materials with low emissivity and heat-insulating ability are indispensable in fundamental materials science and modern military, but it still remains a great challenge of realizing these two features integration in a composite material with all-in-one structure, and without interface compatibility and adhesive problems. Herein, a lightweight aluminum/bismuth oxide/waterborne polyurethane (Al/Bi2O3/WPU) composite foam with asymmetric structure was fabricated by a simple density-induced fillers separation associated freeze-drying process, in which the asymmetric structure was derived from the high-density Al/Bi2O3 sheets deposited at the bottom of composite by the gravity effect during the processing, acting as a low infrared emissivity layer, while the WPU foam formed on the top side as a thermal insulation layer. Through joining the two features in this all-in-one composite foam, it shows a relatively low surface infrared emissivity (0.68), low thermal conductivity (similar to 48.5 mWm(-1)K-1) and good infrared stealth ability to infrared thermal signal. And the temperature difference of about 48.5 degrees C can be generated with the hot target at 100 degrees C. Furthermore, benefiting from the interconnected porous framework, the composite also exhibits good mechanical and thermal stabilities, making it possible for application in various scenarios. This study provides a promising inspiration for designing and developing high-efficiency infrared stealth materials.