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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。
Through the crochet process, ACF and glass fiber (GF) were interlaced to improve the designability and complexity of frequency selective surface (FSS). ACF crochet structure unit circuit board carbon fiber / epoxy resin (ACF / EP) composite. The effects of different braided structures and ACF mass fractions on the microwave absorbing properties of the composites were investigated. The results show that the maximum reflection loss (RL) of ACF / EP composites with 4-pin jujube-shaped FSS with 100% ACF and FSS with 16-pin jujube FSS with mass fraction of 50% can reach above -50dB, Bandwidth (RL <-10dB) up to 10GHz. The complicated crochet design increases the porous structure of ACF / EP composites, widens the effective absorption bandwidth, and has more irregular apertures in the 4-pin jujube structure to make the wave absorption effect remarkable. Appropriate amount of ACF mass fraction combined with braided structure is conducive to obtaining the ideal CF / EP absorbing composite material.