目的：优化水性红外隐身涂层材料制备工艺，提高低发射率红外隐身涂料隐身性能。方法采用红外辐射率测量仪、红外光谱吸收仪等，研究涂层固化温度、涂层表面粗糙度和涂层厚度对低发射率红外隐身涂料隐身性能的影响。结果固化温度对涂层红外发射率和基体树脂红外吸收光谱影响不大，但随着固化温度升高，涂层固化时间明显缩短；随着涂层表面粗糙度的增加，涂层红外发射率增加；表面粗糙材料红外发射率受测试角度影响小于表面光滑材料；在基材上制备不同厚度的涂层，当涂层厚度小于30μm时，涂层红外发射率受基材表面红外发射率影响较大，当大于30μm时，影响较小。结论可以根据实际时间需求选择合适的涂层固化温度，宜选择刮涂方式使涂层表面保持一定的粗糙度，涂层厚度宜为30~40μm。
ABSTRACT:Objective In order to promote the stealth performance of the low-emissivity infrared stealth coatings, the preparation process of water-based infrared stealth coatings was optimized. Methods Infrared emissivity measurement instrument, infrared spectrum analyzer and so on were used in this paper to study the effects of the curing temperature, surface roughness and coating thickness on the stealth performance of the low-emissivity infrared stealth coatings. Results Curing temperature had little effect on the emissivity of coatings and IR absorption spectrum of matrix resin, but the coating curing time obviously shortened with increas-ing curing temperature. The infrared emissivity increased with the increase of surface roughness. The test angle had larger influence on the infrared emissivity of materials with smooth surface than that of materials with rough surface. Coatings with different coating thickness were perpetrated on substrate, the infrared emissivity was obviously affected by the infrared emissivity of the substrate sur-face when the coating thickness was below 30 μm, but the influence was relatively small when the coating thickness was above 30μm. Conclusion Proper curing temperature could be chosen according to the actual need of time. The process of blade coating should be chosen to keep a certain surface roughness. The coating thickness should be between 30 μm and 40 μm.
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