Advanced Textile Technology ›› 2022, Vol. 30 ›› Issue (1): 61-69.DOI: 10.19398/j.att.202101025

• Materials Engineering • Previous Articles     Next Articles

Preparation of a composite material with woven fabric/thermal insulation coating sandwich structure and its infrared stealth performance

ZHAO Hongjie, ZHU Chengyan, JIN Xiaoke, WENG Xiaoxia, TIAN Wei()   

  1. Key Laboratory of Advanced Textile Materials and Preparation Technology of Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018
  • Received:2021-01-22 Online:2022-01-10 Published:2021-06-29
  • Contact: TIAN Wei

机织物/隔热涂层三明治结构复合材料的制备及红外隐身性能

赵洪杰, 祝成炎, 金肖克, 翁小霞, 田伟()   

  1. 浙江理工大学先进纺织材料与制备技术教育部重点实验室,杭州 310018
  • 通讯作者: 田伟
  • 作者简介:赵洪杰(1996-),男,河南洛阳人,硕士研究生,主要从事红外隐身纺织材料方面的研究。
  • 基金资助:
    浙江理工大学研究生创新研究项目(201820302056)

Abstract:

In order to prepare an infrared stealth composite material, a low-emissivity woven fabric is used as the upper and lower layers, a thermal insulation coating is used as the middle layer, and a composite material with sandwich structure is obtained through hot pressing process. Among them, the low-emissivity woven fabric takes FDY polyester filament as the warp yarn, and silver-plated nylon filament as the weft yarn; the surface-modified SiO2 aerogel is selected as the functional filler for the thermal insulation coating, and E51 epoxy resin is the film forming agent. The morphology and structure of the silver-plated fiber and SiO2 aerogel particles, infrared emissivity of the woven fabric, thermal conductivity of thermal insulation coating film, infrared stealth performance of the composite material, etc. are tested and analyzed, and the optimal process conditions are determined. The results show that when the particle size of the SiO2 aerogel is 15 μm and the mass fraction in the coating is 12%, the thermal insulation performance of the coating film is the best, the thermal conductivity is as low as 0.05835 W/(m·K), and the corresponding composite material has the best infrared stealth effect. Using the composite material to camouflage a heat source target and testing with a thermal infrared imager, it can be concluded that the differences between the surface of material and the surrounding environment in terms of image grayscale and infrared radiation temperature are the smallest.

Key words: low emissivity woven fabric, SiO2 aerogel, thermal insulation coating, composite material with sandwich structure, infrared stealth performance

摘要:

为制备一种红外隐身复合材料,以低发射率机织物作为上下表层,隔热涂层作为中间层,采用热压工艺得到了一种三明治结构复合材料。其中低发射率机织物选取FDY涤纶长丝为经纱,镀银尼龙长丝为纬纱;隔热涂层选取表面改性的SiO2气凝胶为功能填料,E51环氧树脂为成膜剂。对镀银纤维和SiO2气凝胶颗粒的形貌结构、机织物的红外发射率、隔热涂层膜的导热系数、复合材料的红外隐身性能等进行了测试与分析,确定了最佳工艺条件。结果表明:当SiO2气凝胶粒径为15 μm、在涂层中的质量分数为12%时,涂层膜的隔热性能最好,导热系数低至0.05835 W/(m·K),同时对应复合材料的红外隐身效果最好,使用复合材料伪装热源目标并用热红外成像仪进行测试,可以得出材料表面与周围环境的图像灰度差和红外辐射温度差最小。

关键词: 低发射率机织物, SiO2气凝胶, 隔热涂层, 三明治结构复合材料, 红外隐身性能

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