PBT绝缘导热复合材料的性能及制备  

Properties and Preparation of PBT Insulating and Thermally Conductive Composite

作　　者：张宁 滕业方 赵东 汪称意 ZHANG Ning;TENG Yefang;ZHAO Dong;WANG Chenyi(School of Materials Engineering,Changzhou Institute of Industry Technology,Changzhou,Jiangsu 213000,China;School of Materials Science&Engineering,Changzhou University,Changzhou,Jiangsu 213000,China)

机构地区：[1]常州工业职业技术学院,材料工程学院,江苏常州213000 [2]常州大学,材料科学与工程学院,江苏常州213000

出　　处：《塑料》2024年第6期16-22,27,共8页Plastics

基　　金：校级博士创新基金(J020006)。

摘　　要：随着电子技术的发展,高集成和小型化电子器材在高频工作条件下产生的热量迅速累积,对其散热能力提出了更高的要求。因此,设计并合成一种具有优良绝缘导热性能的材料对电子技术发展具有重要意义,其中具备较好的绝缘和加工性能的聚合物材料在微电子技术和高集成电路等领域得到人们的广泛关注。以聚对苯二甲酸丁二醇酯(PBT)为连续相,改性氮化硼(BN-PDA)、多壁碳纳米管(MWCNTs)等导热填料为分散相,制备了绝缘导热复合材料。实验结果表明,PBT/BN-PDA/MWCNTs复合材料内部形成了三维导热网络结构,与PBT/BN-PDA@MWCNTs复合材料相比,其导热能力较好。添加20%BN与4%MWCNTs的PBT/BN-PDA/MWCNTs复合材料的综合性能最佳,热导率为0.94 W/(m·K),与纯PBT相比,提升了223.90%,并且,满足电气绝缘导热的要求。With the continuous development of electronic technology,the heat generated by highly integrated and miniaturized electronic devices under high-frequency working conditions accumulates rapidly,which put forward higher requirements for their heat dissipation capabilities.Therefore,the design and synthesis of a material with excellent insulating and thermal conductivity was of great significance for the development of electronic technology.Polymer materials with excellent insulation and processing properties had attracted a lot of attention in the fields of microelectronics technology and high integrated circuits.The insulating and thermal conductive composite were prepared with polybutylene terephthalate(PBT)as the continuous phase,modified Boron nitride(BN-PDA),multi wall carbon nanotubes(MWCNTs)and other thermal conductive fillers as the dispersed phase.The experimental results indicated that a three-dimensional thermal conductivity network structure was formed inside the PBT/BN-PDA/MWCNTs composite,and the thermal conductivity was slightly higher than that of the PBT/BN-PDA@MWCNTs composite.The PBT/BN-PDA/MWCNTs composite material with 20%BN and 4%MWCNTs had the best comprehensive performance,with a thermal conductivity coefficient of 0.94 W/(m·K),which was not only 223.90%higher than pure PBT,but also met the electrical insulation and thermal requirements.

关 键 词：聚对苯二甲酸丁二醇酯 氮化硼 多壁碳纳米管 绝缘导热 三维导热网络 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]