片状FeSiAl/Al2O3共填充聚偏氟乙烯复合材料的吸波导热性能研究  

Study on wave absorption and thermally conductive performance of flaky FeSiAl/Al2O3 co⁃filled polyvinylidene fluoride composites

作　　者：张之琪 李润焘 杨瑞程 代云良 章晓娟 温变英[1] ZHANG Zhiqi;LI Runtao;YANG Ruicheng;DAI Yuniang;ZHANG Xiaojuan;WEN Bianying(College of Chemistry and Materials Engineering,Beijing Technology and Business University,Beijing 100048,China)

机构地区：[1]北京工商大学化学与材料工程学院,北京100048

出　　处：《中国塑料》2023年第9期44-50,共7页China Plastics

基　　金：大学生科学研究与创业行动计划(G013)。

摘　　要：以片状铁硅铝(FeSiAl)与氧化铝(Al2O3)为功能填料、聚偏氟乙烯(PVDF)为基体制备了系列吸波导热复合材料,同时加入硅烷偶联剂进行表面改性,详细研究了不同填料的配比与偶联剂处理对复合材料吸波和导热性能的影响。结果表明,经偶联剂处理后,当片状FeSiAl与Al2O3的填充量都仅为20%(质量分数,下同)时即获得良好吸波性能,最低反射损耗值达到了-37.1 dB,而当FeSiAl与Al2O3的含量分别为20%和30%时,热导率较纯PVDF提升了168.2%;通过将片状FeSiAl和Al2O3两种填料进行复配并结合偶联剂处理,在较低填充量下实现了吸波和导热性能的兼顾提升。A series of microwave absorbing and thermally conductive composites were prepared using polyvinylidene fluo-ride(PVDF)as a matrix resin,flaky FeSiAl and alumina(Al2O3)as functional fillers,and silane coupling agent as a sur-face modifier.The effects of filler content and coupling agent treatment on the wave absorption and thermal conductive performance of the composite samples were intensively investigated.The results indicated that when only 20 wt%of sur-face-treated FeSiAl and Al2O3 was incorporated as fillers,the PVDF/FeSiAl/Al2O3 composites exhibited good wave ab-sorbing performance,and their lowest reflection loss value was-37.1 dB.When the contents of FeSiAl and Al2O3 were 20 wt%and 30 wt%,respectively,the composites obtained an increase in thermal conductivity by 168.2%compared to pure PVDF.Through a combination of flake FeSiAl and Al2O3,followed by the surface treatment with a coupling agent,the wave absorption and thermal conductive performance were both improved at a low filler content.

关 键 词：片状铁硅铝 片状氧化铝 聚偏氟乙烯 吸波性能 导热性能 

分 类 号：TQ325.4[化学工程—合成树脂塑料工业]