颜料含量对复合涂层红外发射率的作用机制研究  

Mechanism of Pigment Content on Infrared Emissivity of Composite Coatings

作　　者：张伟钢[1] 徐国跃[1] 徐飞凤[1] 丁儒雅[1] 谭淑娟[1] 

机构地区：[1]南京航空航天大学材料科学与技术学院,江苏南京210016

出　　处：《光谱学与光谱分析》2012年第10期2661-2663,共3页Spectroscopy and Spectral Analysis

基　　金：国家重点基础研究发展计划(973计划)项目(XXXXX03zt2-06-ZZT2);国家自然科学基金项目(51173079);航空科学基金项目(2009ZA52013);南京航空航天大学专项科研基金项目(1006_56XHA09002)资助

摘　　要：以聚氨酯(PU)为粘合剂,某片状金属粉为颜料,采用刮涂法制备了PU/片状金属复合涂层。对不同颜料含量条件下涂层的红外发射率进行了测试,并采用扫描电镜对涂层的微结构进行了观察。发射率测试结果表明,涂层发射率随金属粉含量增加呈"∪"型变化。微结构观察结果表明,PU/片状金属复合涂层由PU和片状金属粉交错堆叠而成,具有类似一维光子结构特征。基于涂层的微结构特征,对具有转折变化特征的4个金属粉含量点状态下涂层中一维光子结构的反射光谱进行了模拟计算,结果表明:PU/片状金属复合涂层的发射率随金属粉含量变化呈"∪"型变化关系特征主要是由涂层中一维光子结构的主反射峰中心波长随颜料含量增加所产生的蓝移现象引起的。Polyurethane （PU）/flaky metal composite coatings were prepared by using PU and flaky metal powders as adhesives and pigments, respectively. The infrared emissivity of coatings with different metal content was measured by infrared emissometer, and the microstructure of PU/flaky metal composite coatings was observed by scanning electron microscopy. The results of infrared emissivity measurement indicate that the emissivity changes significantly with increasing metal content and presents a ＂U＂ type. The results of microstrueture observation indicate that PU/flaky metal composite coatings have one-dimensional photonic structural characteristics. According to the microstructure characteristics, the optical reflection spectra of one-dimensional photonic structure in PU/flaky metal composite coatings with different metal content were simulated, and the results show that ＂U＂ type variation of emissivity with increasing metal content is derived from the blue-shift of reflection peak wavelength with increasing metal content of one-dimensional photonic structure in coatings.

关 键 词：复合涂层 红外发射率 颜料含量 作用机制 反射光谱 

分 类 号：E952.2[军事—军事工程]