Journal of Materials Science: Materials in Electronics

, Volume 30, Issue 23, pp 20515–20524 | Cite as

In situ synthesis of core–shell nanocomposites based on polyaniline/Ni–Zn ferrite and enhanced microwave absorbing properties

  • Quanfang Li
  • Xiangyuan Wang
  • Zilong Zhang
  • Suli Chen
  • Shuoyun Wei
  • Xue Gong
  • Liying Ma
  • Hongbing Yao
  • Xueyan DuEmail author


Core–shell nanocomposites based on polyaniline/Ni–Zn ferrite (PANI-NZFO) were successfully fabricated by a method of in situ oxidative polymerization, and the aggregation of Ni–Zn ferrite (NZFO) nanospheres can be controlled through adjusting the weight ratio of NZFO/aniline (NZFO/ANI). As a result, the sample with NZFO/ANI weight ratio of 3:100 exhibits the optimal reflection loss (RL) value of − 46.5 dB. Particularly, PANI-NZFO present excellent dielectric loss (0.18 < tanδe < 0.35) due to the coating of PANI. TEM images show the core–shell structure of PANI-NZFO and the dispersibility of NZFO is favorable. In order to avoid the NZFO nanospheres from being damaged by the acid, their surface was firstly grafted with amidogen (–NH2). Simultaneously, it is clear that the NZFO nanospheres haven’t been destroyed during the process of coating, which has been confirmed by XRD patterns, and a formation mechanism was designed. FTIR spectra indicate that the coating observed in TEM images is exactly polyaniline (PANI). The effects of NZFO/ANI weight ratio (or conductivity), volume fraction (of PANI-NZFO/paraffin containing PANI-NZFO) and layer thickness on microwave absorbing properties were investigated at room temperature in the frequency range of 0–18 GHz.



The authors gratefully acknowledge financial supports from the National Natural Science Foundation of China (Grant Nos. 51363015; 51501042), and thank the measurements supports from the Key Laboratory of Magnetism and Magnetic Materials of Ministry of Education (Lanzhou University).


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Key Laboratory of Evidence Science of Gansu ProvinceGansu University of Political Science and LawLanzhouChina
  2. 2.Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of EducationInstitute of Polymer, Northwest Normal UniversityLanzhouChina
  3. 3.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Key Laboratory of Nonferrous Metal Alloys and ProcessingMinistry of Education, School of Materials Science & Engineering, Lanzhou University of TechnologyLanzhouChina
  4. 4.College of Chemistry and Chemical EngineeringLanzhou UniversityLanzhouChina

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