环氧树脂/聚多巴胺改性铝粉导热绝缘复合材料的制备与性能研究  

Preparation and Properties of Thermal Conductive Insulating Composites of Epoxy Resin/Polydopamine Modified Aluminum Powders

作　　者：尚蓓蓉[1] 赵晓莉[1] 郑水蓉[1] 王兆福[1] 齐暑华[1] 

机构地区：[1]西北工业大学理学院应用化学系,陕西西安710129

出　　处：《中国塑料》2016年第4期30-34,共5页China Plastics

摘　　要：采用化学包覆的方法在平均粒径分别为4.5μm和20μm的铝(Al)粉上包覆一层有机聚多巴胺(PDA),以环氧树脂(EP)为基体,包覆改性后的铝粉(PDA@A1)为导热填料,采用浇铸法制备了高导热绝缘环氧基复合材料(EP/PDA@Al)。结果表明,PDA@Al的加入有利于提高EP的热稳定性以及热导率,且当PDA@(20μm)Al的含量为20%(质量分数,下同)时,复合材料的热导率为0.521 W/(m·K),相比纯EP的热导率提高了184%;相对纯Al填充的EP复合材料,EP/PDA@Al复合材料的绝缘性能显著提高。Aluminum powder was first coated with a layer of polydopamine （PDA） and then was introduced into an epoxy resin forming a high thermal conductive insulation composite （EP/PDA@ A1）. When the content of coated A1 particles was 20 wt%, the thermal conductivity of the composite reached 0. 521 W/（m · K）, which was 184 % higher than that of neat EP. The coating of PDA made AI particles more effective in enhancing of thermal conductivity.

关 键 词：环氧树脂 聚多巴胺 铝粉 化学包覆 导热 

分 类 号：TB332[一般工业技术—材料科学与工程]