3 years ago

Facile Preparation of Core–Shell Fe3O4@Polypyrrole Composites with Superior Electromagnetic Wave Absorption Properties

Facile Preparation of Core–Shell Fe3O4@Polypyrrole Composites with Superior Electromagnetic Wave Absorption Properties
Donggui Tan, Mengxing Su, Jingjing Wang, Lei Li, Ke Tian, Zhengchen Wu, Wei Hu
Core–shell Fe3O4@polypyrrole (PPy) composites with excellent electromagnetic wave absorption properties have been prepared by a sequential process of etching, polymerization, and replication. Templating from pre-prepared Fe3O4 microspheres, ferric ions were released from the skin layer of the microspheres by acid etching and initiated the oxidative polymerization of pyrrole in suit. The morphological and textural evolution of core–shell Fe3O4@PPy composites depending on etching time was investigated by scanning and transmission electron microscope. A maximum reflection loss of as much as −41.9 dB (>99.99% absorption) at 13.3 GHz with a matching layer thickness of 2.0 mm was achieved when the etching time was 5 min. In comparison with other conductive polymer-based core–shell composites reported previously, the Fe3O4@PPy composites in this study not only possess better reflection loss performance but also demonstrate a wider effective absorption bandwidth (<−10.0 dB) over the entire Ku band (12.0–18.0 GHz). The excellent electromagnetic wave absorption properties of the core–shell Fe3O4@PPy composites are mainly attributed to the enhanced dielectric loss from the PPy shell.

Publisher URL: http://dx.doi.org/10.1021/acs.jpcc.7b04230

DOI: 10.1021/acs.jpcc.7b04230

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.