膨胀石墨/碳纤维复合材料的制备及毫米波衰减性能  

Preparation and Millimeter-wave Attenuation Performance of Expanded Graphite and Carbon Fiber Compound Material

作　　者：陈昕[1] 韩爱军[1] 叶明泉[1] 刘厅[1] 冯炜[1] 

机构地区：[1]南京理工大学化工学院,南京210094

出　　处：《光电技术应用》2016年第2期39-42,61,共5页Electro-Optic Technology Application

基　　金：国家自然科学基金(61171043)

摘　　要：以天然鳞片石墨和聚丙烯腈基碳纤维为原料,以HCl O_3-H_3PO_4-Cr O_3为插层剂,乙醇为分散剂,制备了膨胀石墨/碳纤维复合干扰材料。用扫描电镜、四探针法及毫米波动态测试系统表征了复合干扰材料的形貌、导电性及毫米波衰减性能。研究表明,碳纤维呈单根分散,均匀搭连在膨胀石墨表面。在一定的质量范围内,碳纤维的加入使膨胀石墨的导电性能明显增强,毫米波衰减性能显著提高。当天然鳞片石墨原料粒径为180μm、1.5~2 mm长的短切碳纤维质量含量为20%时,衰减性能最优。With the material of natural flake graphite and polyacrylonitrile-based carbon fiber, the compoundinterference material of expanded graphite and carbon fiber is developed using HCl O3-H3PO4-Cr O3 as intercalantand alcohol as dispersing agent. The morphology, conductive performance and millimeter-wave（MMW） attenuationperformance are characterized by means of scanning electron microscope（SEM）, four probe method and MMW dy-namic testing systems. The results indicate that carbon fiber disperses uniformly among the expanded graphite assingle fiber. Within certain mass range, the conductive performance of the expanded graphite is strengthened andMMW attenuation performance is improved obviously when mixed with carbon fiber. When the grain size of naturalflake graphite is about 180 μm and the mass content of short carbon fiber with 1.5 to 2 mm length reaches 20%,MMW attenuation performance is the best.

关 键 词：膨胀石墨 碳纤维 复合干扰材料 毫米波衰减 

分 类 号：TQ129[化学工程—无机化工]