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电磁波吸收剂BaTiO_3/MWCNT及其与PAN杂化纤维的制备与性能研究 预览 被引量:6

Preparation and Properties of Electromagnetic Wave Absorption Materials BaTiO_3/MWCNT and Derived PAN Hybrid Fibers
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摘要 采用溶剂热法制备出一种包含BaTiO_3和多壁碳纳米管(MWCNTs)的复合吸波剂.通过透射电镜分析吸波剂的形貌发现:粒径为15~30 nm的BaTiO_3颗粒均匀地包覆在MWCNTs的外壁.电磁波吸收性能分析表明:BaTiO_3/MWCNT纳米复合吸波剂的反射损耗(RL)要大于BaTiO_3和MWCNTs,这是由于其有更好的阻抗匹配和更高的复合磁导率.当单层材料的计算厚度为2mm时,BaTiO_3/MWCNT纳米复合吸波剂的RL在9.6~13.1 GHz的频段中超过了-10dB,同时在10.4 GHz处达到最大值-37.5 dB.为了研究BaTiO_3/MWCNT纳米复合吸波剂与聚丙烯腈(PAN)基体的相容性和其杂化纤维的可纺性,采用静电纺丝成型制备吸波剂含量为10wt%的PAN杂化纤维.通过X射线衍射和扫描电子显微镜分析发现:BaTiO_3/MWCNT纳米复合吸波剂成功与PAN纤维杂化,吸波剂的结构在成型过程中没有变化,吸波剂的添加并未影响纤维形貌. BaTiO_3/multi-walled carbon nanotubes(MWCNTs) composite was synthesized by an efficient solvent-thermal route.Transmission electron microscope images clearly indicate that the surfaces of the MWCNTs are uniformly decorated by well-crystallized BaTiO_3 particles with diameters of 15-30 nm.The result of Electromagnetic (EM) wave absorption properties analysis,determined by the EM parameters,shows that the reflection loss(RL) in the BaTiO_3/MWCNT composite is higher than that occurring in pure MWCNTs or BaTiO_3,which resulted from the better matched characteristic impedance and enhanced complex permeability in the high frequency. The maximum RL of-37.5 dB in the BaTiO_3/MWCNT composite is obtained at a frequency of 10.4 GHz and the absorption range is under -10 dB in the frequency range of 9.6-13.1GHz with the absorber thickness of 2 mm. BaTiO_3/MWCNT/PAN hybrid fibres,derived from a PAN solution containing 10 wt%BaTiO_3/MWCNT composite, were prepared by the electrospinning process.The results of XRD and SEM indicated that both the structure of BaTiO_3/MWCNT composite and the morphology of PAN changed little after the hybrid process.BaTiO_3/MWCNT composite has the well compatibility with PAN matrix.
作者 毕成 朱美芳 张青红 李耀刚 王宏志 BI Cheng,ZHU Mei-Fang,ZHANG Qing-Hong,LI Yao-Gang,WANG Hong-Zhi (State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Engineering Research Center of Advanced Glasses Manufacturing Technology,MOE,Donghua University,Shanghai 201620,China)
出处 《无机材料学报》 SCIE EI CAS CSCD 北大核心 2010年第8期829-834,共6页 Journal of Inorganic Materials
基金 国家自然科学基金(50772022)
关键词 多壁碳纳米管 BaTiO_3纳米颗粒 电磁波吸收性能 PAN杂化纤维 multi-walled carbon nanotubes BaTiO_3 nanoparticle electromagnetic wave absorbing-ability PAN hybrid fiber
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