Fe_(3)O_(4)-MWCNTs杂化纳米纸对纤维增强复合材料吸波性能的影响  

Effect of Fe_(3)O_(4)-MWCNTs Hybrid Buckypapers on the Microwave Absorbing Properties of Fiber Reinforced Composites

作　　者：李威霖 王佳 焦剑[1] LI Weilin;WANG Jia;JIAO Jian(School of Chemistry and Chemical Engineering,Northwestern Polytechnical University,Xi'an 710129,China;Xi'an Chaoma Technology Co.,Ltd.,Xi'an 710025,China)

机构地区：[1]西北工业大学化学与化工学院,西安710129 [2]西安超码科技有限公司,西安710025

出　　处：《材料导报》2022年第5期188-193,共6页Materials Reports

基　　金：陕西省自然科学基础研究计划(2020JM-087)。

摘　　要：本工作采用原位合成法及真空抽滤法制备了四氧化三铁-多壁碳纳米管(Fe_(3)O_(4)-MWCNTs)杂化纳米粒子及杂化纳米纸,并将这类杂化纳米纸铺贴于玻璃纤维/环氧树脂(GF/EP)基板上制备了吸波复合材料,此类吸波材料极大地改善了吸波涂层在应用中用量受限、成型工艺差、吸波性能难以调控的问题。研究结果表明:在Fe_(3)O_(4)含量为30%(质量分数,下同)时,Fe_(3)O_(4)/MWCNTs杂化纳米粒子及其纳米纸吸波性能最佳,杂化纳米粒子的反射损耗RL<-10 dB的频宽为2.88 GHz,最小RL在14.7 GHz处可达-26.36 dB;杂化纳米纸的RL<-10 dB的频宽为6.0 GHz,最小RL在16.3 GHz处可达-26.4 GHz。吸波复合材料经EP表面处理后的吸波性能得到提高,最小RL在14.2 GHz处达到-25.6 dB;多层铺贴杂化纳米纸增加了吸波层厚度,提高了吸波复合材料的吸波性能,当铺贴两层纳米纸时材料的吸波性能最佳,RL<-6 dB的频宽为4.5 GHz,最小RL在12.4 GHz处可达-31.2 dB。Fe_(3)O_(4)-MWCNTs hybrid nanoparticles are prepared by in-situ synthesis method and hybrid buckypapers are prepared furtherly by vacuum filtration method.This kind of absorbing materials greatly solves the problems of limited dosage,poor molding process,and difficulty in controlling absorbing performance in the application of absorbing coatings.The Fe_(3)O_(4)/MWCNTs hybrid nanoparticles exhibit an effective absorption bandwidth of 2.88 GHz(below-10 dB)and minimum RL value of-26.36 dB at a frequency of 14.7 GHz at 30%loading of Fe_(3)O_(4).Under the same ratio,the bandwidth of hybrid buckypapers is 6.0 GHz(below-10 dB)and minimum RL value is-26.4 GHz at a frequency of 16.3 GHz.Additionally,the absorbing composites shows RL value of-25.6 dB at a frequency of 14.2 GHz,which indicates the absorbing performance of absorbing composites are improved after EP coating surface of composites.Moreover,the multi-layer hybrid buckypapers being pasted on the GF/EP composites increase the thickness of the absorbing layer,which improves the absorbing performance of the absorbing composites.The absorbing composites with two layers of hybrid buckypapers dominate their good absorbing performances including an effective absorption bandwidth of 4.5 GHz(below-6 dB)and the minimum RL value of-31.2 dB at a frequency of 12.4 GHz.

关 键 词：多壁碳纳米管(MWCNTs) 四氧化三铁(Fe_(3)O_(4)) 杂化纳米纸 吸波复合材料 吸波性能 

分 类 号：TB332[一般工业技术—材料科学与工程]