一种新型碳纳米纤维的电磁性能研究  

Electromagnetic Properties of Novel Carbon Nanofibers

作　　者：王改花[1] 代波[1] 马拥军[1] 任勇[1] 

机构地区：[1]西南科技大学材料科学与工程学院,四川省非金属复合与功能材料重点实验室,绵阳621010

出　　处：《无机材料学报》2013年第4期398-402,共5页Journal of Inorganic Materials

基　　金：国家973计划(2011CB612212);教育部“新世纪优秀人才计划”(NCET-11-1061)~~

摘　　要：细菌纤维素在一定温度下碳化,得到一种三维网状结构的纳米碳化纤维(CBC),利用X射线衍射仪、拉曼光谱仪和透射电子显微镜对这种新型碳纤维进行了分析表征。将CBC与石蜡按一定比例复合,采用矢量网络分析仪在0.1-18 GHz范围处测试了其电磁参数,发现此复合材料具有较大的介电常数实部和虚部,特别是在频率较低时,具有很大的介电损耗。将少量CBC与Fe3O4纳米颗粒复合,可极大地改善磁性颗粒的微波吸收性能,当样品厚度为1.2 mm时,反射损耗(RL)最小值从–2 dB降至–21 dB。Carbonized bacterial cellulose（CBC） with a three dimensional net-linked framework were synthesized from carbonized bacterial cellulose and investigated by X-ray diffraction,Raman spectrum and Transmission electron microscopy.The complex permittivity and permeability of CBC/paraffin wax composite with certain ratio of the composite were measured by vector network analysis in the frequency range of 0.1-18 GHz.It is found that the composite has high permittivity and dielectric loss,especially at the low frequency.The electromagnetic characteristics of the CBC/Fe3O4complex absorbers synthesized by mixing a small quantity of CBC with Fe3O4 were also studied,aiming at improving the microwave absorbing properties of Fe3O4/Wax composite.When the sample’s thickness was 1.2 mm,the reflection loss reached a minimal value of -21 dB for CBC-Fe3O4/Wax and of -2 dB for Fe3O4/Wax as well.

关 键 词：细菌纤维素 纳米碳纤维 三维网状结构 电磁性能 

分 类 号：O441[理学—电磁学]