Double-shell PANS@PANI@Ag hollow microspheres and graphene dispersed in epoxy with enhanced microwave absorption

  • Bin ZhangEmail author
  • Jun WangEmail author
  • Jiashun Peng
  • Jiuxiao Sun
  • Xiaogang Su
  • Yi Zou
  • Yu Zhou


Double-shell hollow conductive poly(acrylonitrile) microspheres@polyaniline@Ag (PANS@PANI@Ag) was synthesized by a facile two-step method. Polyaniline-coated poly(acrylonitrile) microspheres (PANS@PANI) prepared by in situ polymerization exhibited a porous, corrugated and compact conductive network, making for the formation and attachment of Ag nanoparticles. Incorporating these hollow conductive spheres and reduced graphene oxide (RGO) into epoxy resin, a lightweight microwave absorber was brought out. The chemical composition, micro-structure surface morphology and electromagnetic properties were thoroughly characterized and analyzed. The calculated results showed that the optimal reflection loss (RL) was − 44.9 dB at 9.16 GHz with a constitution of 1 wt% dielectric RGO and 1 wt% conductive PANS@PANI@Ag, and the corresponding effective bandwidth was about 2 GHz. However, the microwave absorption capacity gradually reduced with the raise of PANS@PANI@Ag content, derived from the high conductivity leading to more microwave reflection. As the PANS@PANI@Ag content increased to 5 wt%, the minimum RL was − 14.7 dB and still remained an effective absorption performance with a lower density of 0.47–0.53 g/cm3. Therefore, the as-obtained composites paved a new route for lightweight and strong absorption microwave absorbers in commercial and military application.



We gratefully thank for the financial support from the National Natural Science Foundation of China (Grant No. 51672201) and the Fundamental Research Funds for the Central Universities (WUT 2017-YB-006).


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Authors and Affiliations

  1. 1.School of Materials Science and EngineeringWuhan Textile UniversityWuhanPeople’s Republic of China
  2. 2.Ministry of Education Key Laboratory of Textile Fiber ProductsWuhan Textile UniversityWuhanPeople’s Republic of China
  3. 3.School of Materials Science and EngineeringWuhan University of TechnologyWuhanPeople’s Republic of China
  4. 4.Shenzhen Foreign Languages SchoolShenzhenPeople’s Republic of China

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