钩针工艺之于活性碳纤维/环氧树脂电路屏吸波复合材料的设计  

Crochet process in design of activated carbon fibers/epoxy circuit screen composites with high microwave absorbing

作　　者：姚斌[1,2] 马葳葳 夏少旭[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]东华大学材料科学与工程学院,上海201620

出　　处：《复合材料学报》2017年第1期47-52,共6页Acta Materiae Compositae Sinica

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：通过钩针工艺将活性碳纤维(ACF)和玻璃纤维(GF)混编,提高了频率选择性表面(FSS)的可设计性和复杂性,制备了ACF钩针结构单元电路屏碳纤维/环氧树脂(ACF/EP)复合材料。研究了不同编织结构和ACF质量分数对复合材料吸波性能的影响。结果表明:ACF质量分数为100%的4针枣形FSS的ACF/EP复合材料和质量分数为50%的16针枣形FSS复合材料的最大反射损耗(RL)可以达到-50dB以上,有效吸收带宽(RL<-10dB)达10GHz以上。复杂的钩针设计使ACF/EP复合材料的多孔结构增多,有效吸收带宽变宽,4针枣形结构具有较多不规整孔径使吸波效果显著。适量的ACF质量分数结合编织结构有利于获得理想的CF/EP吸波复合材料。Crochet process was specially applied to combine activated carbon fibers（ACF）with glass fibers（GF）to improve the designability and complexity of frequency selective surface（FSS）,ACF crochet structure circuit screen carbon fibers/epoxy（ACF/EP）composites were prepared.The effect of different knitted structure and ACF mass fraction to microwave absorbing performance of composites was discussed.The results show that the maximum reflection loss（RL）of both 4-needle-date-shaped FSS CF/EP composites with 100% CF and 16-needle-dateshaped FSS composites with 50% CF are higher than-50 dB,in addition,the effective absorption bandwidth（RL〈-10dB）could reach to 10 GHz.With complex crochet design,the porous structure of CF/EP composites increase,effective absorption bandwidth（RL〈-10dB）broaden,and 4-needle-date-shaped structure with more irregular aperture has excellent microwave absorbing property.Ideal CF/EP microwave absorbing composites will be obtained by combining the suitable mass fraction of chopped CF and knitted structure.

关 键 词：钩针工艺 碳纤维 频率选择型表面 多孔结构 吸波性能 

分 类 号：TB332[一般工业技术—材料科学与工程]