| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1440311 | Synthetic Metals | 2015 | 9 Pages |
•Novel 3D CIP@PPy aerogel composites were synthesized.•Dopamine was used as intermediary to connect CIPs with PPy.•Flaky carbonyl iron powder enhance internal multiple reflections.•Two strong absorption peaks are −38.9 and −39.5 dB, the bandwidth is 6.1 GHz.•Interfacial polarization and geometry effect are the crucial mechanisms.
Novel 3D CIP@PPy aerogel composites were synthesized through a self-assembled polymerization method using dopamine as intermediary. The 3D CIP@PPy aerogel composites were characterized by scanning electron microscope (SEM), X-ray diffractometer (XRD) and Fourier transform infrared spectrometer (FTIR). The absorption properties were investigated by a vector network analyzer (VNA) in the frequency range of 2–18 GHz. For the CIP@PPy 33 wt% aerogel, the RLs show two strong absorption peaks values of −38.9 and −39.5 dB at 12.2 GHz and 14.2 GHz under the thickness of 2.2 mm, respectively, and the bandwidth can reach 6.1 GHz. The CIP@PPy aerogel composites would be a promising candidate as microwave absorption materials (MAMs) with strong absorption, wide frequency band and lightweight. The improvement of microwave absorbing properties can be attributed to interfacial polarization and geometry effect.
