摘要： 为提高冷冻设备中蒸发器的散热效率，以水可分散功能化石墨烯作为填料，通过相转移方法将其分散到环氧树脂基体中，在不锈钢基材上成功制备出石墨烯/环氧导热涂层。并对其导热性以及耐腐蚀性能进行研究。结果表明：不同石墨烯含量的涂层导热性能有显著差异，当石墨烯添加量为 9%时，导热率高达 5. 82 W/（m·K），可实现快速散热，且具有优异的耐水性、耐酸性，在适量的石墨烯添加量时，可获得防腐性能优异的导热涂层。相比无涂层试样，添加 9%石墨烯的导热涂层在室温下传热过程的最大温差可达 5℃，-80 ℃条件下的最大温差可达 16 ℃，这一涂层在速冻领域有潜在应用价值。

关键词: 导热涂层, 散热, 石墨烯, 环氧涂层

Abstract: To improve the heat dissipation efficiency of the evaporator in refrigeration equipment，water-dispersible functionalized graphene was used as a filler. It was dispersed intothe epoxy resin matrix through the phase transfer method，and a graphene/epoxy thermallyconductive coating was successfully prepared on the stainless steel substrate. Its thermal conductivity and corrosion resistance were studied. The results showed that there were significant differences in the thermal conductivity of coating with different graphene contents.When the amount of graphene added was 9%，the thermal conductivity was as high as 5. 82 W/（m·K），which could achieve rapid heat dissipation and had excellent water resistance andacid resistance. When the amount of graphene added was appropriate，a thermally conductivecoating with excellent corrosion resistance could be obtained. Compared with the uncoated sample，the maximum temperature difference of the heat transfer process of the thermally conductive coating with 9% graphene added could reach 5 ℃ at room temperature and 16 ℃ at -80 ℃. This coating had potential application value in the field of quick-frozen food.

Key words: thermal conductivity coating, heat dissipation, graphene, epoxy coating

中图分类号: 

• TQ637. 6