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《Acta Materiae Compositae Sinica》 2017-01
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Crochet process in design of activated carbon fibers/epoxy circuit screen composites with high microwave absorbing

YAO Bin;MA Weiwei;XIA Shaoxu;WU Qilin;State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Donghua University;College of Materials Science and Engineering,Donghua University;  
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.
【Fund】: 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)
【CateGory Index】: TB332
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