GF/CF/ACFFS多层复合材料的吸波性能研究  

MICROWAVE ABSORPTION PROPERTY OF GF / CF / ACFFS MULTILAYER COMPOSITIES

作　　者：姚斌[1,2] 夏少旭[1,2] 欧湘慧 程朝歌 李敏[1,2] 吴琪琳[1,2] 

机构地区：[1]东华大学纤维材料改性国家重点实验室,上海201620 [2]东华大学材料学院,上海201620 [3]华东师范大学,上海200241

出　　处：《玻璃钢／复合材料》2016年第4期26-30,共5页Fiber Reinforced Plastics/Composites

基　　金：国家自然科学基金(60975059);上海市教育委员会科研创新重点项目(14zz069)

摘　　要：基于结构型复合材料的复合效应和设计原理,以圆形缝隙型活性碳毡电路屏（ACFFS）为基础吸波剂,短切碳纤维（CF）为增强吸波剂,以玻璃纤维（GF）增强的环氧树脂（EP）为阻抗匹配层,设计了GF/CF/ACFFS多层吸波复合材料。研究了短切碳纤维质量分数和层间排布对GF/CF/ACFFS多层复合材料吸波性能的影响。研究结果表明,在2～18GHz频率范围内,CF质量分数为0.7%,底层为ACFFS/EP的三层吸波复合材料最大反射衰减（RL）为-38.54d B,且有效吸收带宽（RL〈-10d B）达到11.33GHz（6.17～17.5GHz）。当短切碳纤维质量分数适量时可以有效提高复合材料的吸波性能,将CF和ACFFS合理组合有利于获得性能优异的吸波材料。On the basis of the complex effect and design principle of structural composites,applying activated carbon fiber felts screen / epoxy（ ACFFS / EP） as wave-absorption layers,carbon fibers（ CF） as enhanced wave-absorption agents and glass fiber（ GF） as impedance matching layer respectively,GF / CF / ACFSS was prepared by layer-by-layer assembly technique with the help of tailor-made mold. The effect of chopped CF mass fraction and of arrangements between the layers on microwave absorbing performance of GF / CF / ACFFS was investigated. Experimental results show that the maximum reflection loss（ RL） to electromagnetic wave was up to-38. 54 d B at the frequency of 14. 2 GHz for three-layers GF / CF / ACFFS composites with ACFFS / EP at bottom when the mass fraction of CF is 0. 7% within the frequency range of 2 ～ 18 GHz. In addition,the effective absorbing bandwidth（ RL-10 d B） was acquired at 11. 33 GHz（ 6. 17 ～ 17. 5 GHz）. Optimum microwave absorbing property of composites can be acquired with the suitable mass fraction of chopped CF,and absorbing materials with excellent property will be obtained when keeping reasonable combination of CF and ACFFS.

关 键 词：活性碳毡电路屏 短切碳纤维 反射衰减 吸收带宽 

分 类 号：TB332[一般工业技术—材料科学与工程]