Studies on the synthesis and microwave absorption properties of Fe3O4/polyaniline FGM
(0) Electrically conducting polyaniline (PANI)-magnetic oxide (Fe3O4) composites were synthesized by emulsion polymerization in the presence of dodecyl benzene sulfonic acid (DBSA) as the surfactant and dopant and ammonium persulfate (APS) as the oxidant. Transmission electron microscopy (TEM) indicates that the composite has a magnetic core and an electric shell and the modification has prevented the aggregation of Fe3O4 nanoparticles effectively. The electromagnetic parameter measurements (ε, ε, μ and μ) in the range of 2-18 GHz prove that Fe3O4 in the Fe3O4/PANI/DBSA is responsible for the electric and ferromagnetic behavior of the composites. As a result, the electromagnetic parameters can be designed by adjusting the content of the Fe3O4. The microwave absorption of functionally graded material (FGM) was simulated by the computer according to the principle of impedance match and the calculated results agreed quite well with the experimentally measured data (R<-20dB, Δf4>GHz).
Xiao Han Yuan-Sheng Wang
The State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China The Department of Training, Nay University of Engineering, Wuhan 430033, China
国际会议
第二届功能原料国际研讨会(The 2rd International Symposium on Functional Materials)
杭州
英文
335-339
2007-05-16（万方平台首次上网日期，不代表论文的发表时间）