吸波-相变微胶囊／环氧树脂红外微波隐身涂料

Study on RAM-MCPCM/Epoxy Compatible Stealth Coating

采用种子微悬浮聚合法,以月桂酸、硬脂酸丁酯为相变芯材,苯乙烯-二乙烯基苯共聚物为壁材,分别掺杂纳米Fe_3O_4和还原氧化石墨烯(RGO)2种雷达吸波材料(RAM),制备了具有红外、微波兼容隐身功能的微胶囊材料。采用差示扫描量热仪(DSC)、扫描电子显微镜(SEM)和振动样品磁强计(VSM)对微胶囊材料的热性能、微观形貌、磁学性能进行了表征,采用矢量网络分析仪和自制一维平板热传递模型测试了涂层微波吸收和红外伪装性能,并对涂层宏观力学性能进行了测试。结果表明:采用种子微悬浮聚合法制备掺杂RAM的相变微胶囊微观形貌呈表面微凸球状,掺杂RAM后微胶囊仍具有较高相变潜热,相变潜热随RAM质量分数增大而减小;涂层具备红外/微波兼容隐身性能,吸波率随RAM质量分数增加而提高,红外隐身能力随相变材料质量分数增加而提高;涂层具有良好的宏观力学性能。

Mieroeapsules with infrared and microwave compatible stealth function are pre- pared via the seeded micro-suspension polymerization, whieh uses poly （styrene-divinyl- benzene） as wall material and laurie avid or n-butyl stearate as core material and dopes two dirt）rent types of radar absorbing material （RAM） , nano-Fe304 and reduced graphene oxide （RGO）. The mierostructure, thermal properties, magnetic properties are characterized through dift）rential scanning calorimeter （DSC） , scanning electron microscopy （SEM） and vibrating sample magnetometer （VSM） , the infi＇ared and microwave compatible stealth properties of mi- erucapsules are characterized and measured through vector network analyzer and self＇-made one -dimensional plate heat transfer model, and the macroscopic mechanical properties of＂ the coating were tested. The results indicate that the RAM-doped phase change microcapsules pre- pared by the seeded micro-suspension polymerization have a slightly convex spherical suvIhce,and the microcapsules still have a higher latent heat of phase after doping RAM, with the in- crease of RAM mass fraction, the latent heat of phase change becomes smaller. The coatings have the function of infrared and microwave compatible stealth, the higher the RAM mass frac- tion is, the better the microcapsule absorbing performance is. The coatings have good macro- scopic mechanical properties.