分别以短切碳纤维(添加环氧树脂)膜和轻质闭孔聚乙烯泡棉作为电阻层和无损间隔层,通过将短切纤维树脂膜粘接在聚乙烯泡棉上,制备具有Salisbury Screen结构的雷达吸波材料。通过测试材料的反射率,研究吸收剂含量和泡棉厚度对材料吸波性能的影响规律。结果表明,当短切碳纤维含量为0.3%(wt,质量分数),聚乙烯泡棉厚度为3mm时,材料在8G～18GHz的吸波性能最优,其最大反射率可达-26.9dB。
A short carbon fibers(CF) epoxy resin(EP) film as a resistive sheet and the lightweight closed-cell polyethylene(PE) foam was used as a spacer,then adhered the short CF/EP film upon the foam to form the Salisbury Screen structure radar absorbing materials.The reflectivity of radar absorbing materials was measured to study the effect that the content of short CF and thickness of PE foam on the absorbing performance.The results shown that when the content of short CF was 0.3wt% and the thickness of PE foam was 3mm,the material had the best radar-wave absorption performance in 8G～18GHz,and the max reflectivity was -26.9dB.
[1] 索庆涛,许宝才,王建.雷达吸波材料低频化研究现状及进展[J].化工新型材料,2019,46(4):25-28.
[2] Neo C P,Varadan V K.Optimization of carbon fiber composite for microwave absorber[J].IEEE Transactions on Electromagnetic Compatibility,2014,46(1):102-106.
[3] 吴红焕.短切碳纤维和炭黑的介电性能研究[D].西安:西北工业大学,2007.
[4] 赵东林,沈曾民,迟伟东.炭纤维及其复合材料的吸波性能和吸波机理[J].新型炭材料,2001,16(2):66-72.
[5] 邹田春,赵乃勤,师春生.活性碳纤维/树脂复合吸波材料的设计[J].功能材料与器件学报,2007,13(1):54-58.
[6] Lee S E,Lee W J,Oh K S,et al.Broadband all fiber-reinforced composite radar absorbing structure integrated by inductive frequency selective carbon fiber fabric and carbon-nanotube-loaded glass fabrics[J].Carbon,2016,107:564-572.
[7] Wei F,Lin J Y,Nandika D,et al.Enhanced mechanical and radar absorbing properties of carbon/glass fiber hybrid composites with unique 3D orthogonal structure[J].Polymer Testing,2018,69:71-79.
[8] Wei H T,Zhang Q,Zhang Y C,et al.Enhancement of the Cr(VI) adsorption and photocatalytic reduction activity of g-C3N4 by hydrothermal treatment in HNO3 aqueous solution[J].Applied Catalysis A:General,2016,521(5):9-18.
[9] Guo D B,Liu Z H,Ye S T,et al.Microwave absorption properties of carbon fiber radar absorbing coatings prepared by water-based technologies[J].RSC Advances,2017,7(43):26658-26664.
[10] 刘辉,高云雷,赵东林.镀镍中间相沥青基碳纤维的吸波性能[J].安全与电磁兼容,2011,5:9-12.
[11] 陶睿,刘朝辉,班国东,等.2mm短切碳纤维吸波涂层的制备与吸波性能[J].当代化工,2017,10.
[12] 贺龙辉,胡照文,邓联文,等.宽频高性能短切碳纤维/聚氨酯泡沫吸波材料制备[J].功能材料,2017,23:23120-23123.
[13] 黄小忠,黎炎图,余维敏,等.短切磁性碳纤维泡沫复合材料吸波性能研究[J].磁性材料及器件,2010,41(5):15-18,26.
[14] 丁文皓,于名讯,朱洪立,等.含有短切导电纤维聚氨酯泡沫塑料的吸波性能研究[C].2007年中国工程塑料复合材料技术研讨会论文集.北京:中国工程塑料工业协会,2008:121-123.
[15] Fante R D,McCormack M T.Reflection properties of the salisbury screen[J].Transactions on Antennas and Propagation,1988,36(10):1443-1454.
