镀镍碳纳米管/PPESK复合材料的制备及微波吸收性能  

Preparation and Characterization of Nickel-Coated MWNT/PPESK Microwave Absorbing Composites

作　　者：冯学斌[1] 廖功雄[1] 董黎明[1] 郑亮[1] 徐亚娟[1] 蹇锡高[1] 

机构地区：[1]大连理工大学化工学院,辽宁大连116012

出　　处：《高分子材料科学与工程》2008年第12期176-179,共4页Polymer Materials Science & Engineering

基　　金：国家863计划资助项目(2003AA33G030);辽宁省博士启动基金项目资助。

摘　　要：采用化学镀工艺在多壁碳纳米管表面包覆镍-磷合金,并将其与杂萘联苯聚醚砜酮(PPESK)混合制备吸波复合材料。通过扫描电镜、能量散射光谱对镀镍碳管的形貌和成分进行分析,反射率测试系统对复合材料在8 GHz^18 GHz频段的微波吸收特性进行表征。结果表明,在镀镍过程中使用超声振荡有利于得到均匀的镀层。当吸波样品平均厚度为0.97 mm,碳管含量为5 phr时,镀镍碳管/PPESK复合材料的最大吸收峰在10.9 GHz(RL=-27.5 dB),RL<-10 dB的频宽为4.0 GHz。随着填料含量增加,吸收峰往低频方向移动。The Ni-P alloy was successfully coated onto the surface of the MWNTs by electroless deposition, and nickel-coated MWNT/PPESK composites were prepared via the solution-mixing method. The morphology and component of MWNTs and nickel-coated MWNTs were characterized by scanning electron microscope and energy dispersive spectroscopy（EDS）. The properties of reflection loss （RL） versus frequency were determined by a reflection/transmission technique. The results show that ultrasonic vibrations facilitate the uniform nickel lays to be deposited onto MWNTs. For nickel- coated MWNT/PPESK composite wiih 5 phr MWNTs, the measured RL less than - 10 dB could be obtained in the frequency range of 9.5 GHz-13.5 GHz. The impedance matched frequency is 10.9 GHz and the RL shows a minimum value of - 27.5 dB. The frequency of the impedance matching point is shifted to a low value with increasing filler content.

关 键 词：碳纳米管 二氮杂萘酮 聚醚砜酮 微波吸收 

分 类 号：TB383[一般工业技术—材料科学与工程]