中国塑料 ›› 2016, Vol. 30 ›› Issue (04): 30-34 .DOI: 10.19491/j.issn.1001-9278.2016.04.005

• 材料与性能 • 上一篇    下一篇

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

尚蓓蓉1,赵晓莉2,郑水蓉1,王兆福1,齐暑华   

  1. 1. 西北工业大学2. 航天动力技术研究院经营计划部
  • 收稿日期:2015-11-20 修回日期:2016-01-05 出版日期:2016-04-26 发布日期:2016-04-26

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

  • Received:2015-11-20 Revised:2016-01-05 Online:2016-04-26 Published:2016-04-26

摘要: 采用化学包覆的方法在平均粒径分别为4.5 μm和20 μm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@Al)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@(20 μm)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。

关键词: 环氧树脂, 聚多巴胺, 铝粉, 化学包覆, 导热

Abstract: 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@Al).When the content of coated Al 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 Al particles more effective in enhancing of thermal conductivity.

Key words: epoxy resin, polydopamine, aluminum powder, chemical coating, thermal conductivity