碳纳米管/聚乙烯醇/羰基铁粉复合材料的制备及吸波性能研究  

Preparation and wave absorption of carbon nanotube/polyvinyl alcohol/carbonyl iron powder composites

作　　者：彭雪伟 张淇 谢志勇[1] Peng Xue-wei;Zhang Qi;Xie Zhi-yong(State Key Laboratory of Powder Metallurgy,Central South University,Hunan Changsha 410083,China)

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《炭素技术》2020年第2期39-43,共5页Carbon Techniques

基　　金：国家重点基础研究发展计划(973计划)。

摘　　要：通过液相共混法对羰基铁粉(CIP)表面进行聚乙烯醇(PVA)包覆处理,并将碳纳米管(CNT)均匀分散在表面得到复合吸波材料,通过SEM研究其微观形貌,使用矢量网络分析仪表征其电磁参数的关系。结果表明:均匀分散的CNT能有效提高CNT/PVA/CIP复合材料的吸波性能,当CNT的质量分数为0.6%时,复合材料反射损耗在-10 dB以下的频宽约为6.3 GHz,复合材料的反射在8.5 GHz处存在吸收峰,峰值为-50.0 dB。In this work,polyvinyl alcohol(PVA)coating containing homogeneously distributed carbon nanotubes(CNT)is deposited onto the surface of carbonyl iron powder(CIP)to obtain the CNT/PVA/CIP composite by liquid phase mixed method.The relationship between the micro-morphology and electromagnetic parameters is studied in a frequency of 2.0~18.0 GHz.The results show that the homogeneously dispersed CNT can effectively improve the absorption performance of CNT/PVA/CIP composites.When the mass ratio of CNT is 0.6%,the effective absorbing width(reflection loss lower than-10 dB)of the composites is about 6.3 GHz,and the minimum reflection loss is-50.0 dB at 8.5 GHz.

关 键 词：碳纳米管 机械球磨 复合吸波材料 微波吸收 

分 类 号：O613.71[理学—无机化学] TB333[理学—化学]