Efficient and thin microwave absorption materials fabricated by polyzwitterion wrapped carbon nanotube
Abstract
Carbon nanotube (CNT) has a strong microwave (MW) attenuated ability due to its high ability of dielectric loss. However, the impedance mismatch of pure CNT-based absorber makes MW is earlier reflection than absorption. Herein, it is reported that the polyzwitterion wrapped CNT (PZ@CNT) with core-shell structure is prepared through in-situ polymerization of 1-vinyl-3-imidazole-propane sulfonate. Because the high polarity polyzwitterion shell layer in the polyzwitterion-wrapped CNTs (PZ@CNTs) optimizes the impendence match of CNT between airs and attenuates the energy of the microwave through the zwitterionic dipole and interfacial polarization loss. PZ@CNTs based MW absorbers composited with paraffin exhibit a minimum reflection loss (RLmin) of -44.5 dB with 1.9 mm thickness at 10.7 GHz and an effective absorption band of 4.2 GHz at a small thickness of 1.3 mm exceeding many of previously reported the wrapped CNTs with a single polymer. This work paves a new way to improve the microwave absorbing performance of Carbon nanotube.
- Publication:
-
Applied Surface Science
- Pub Date:
- October 2022
- DOI:
- 10.1016/j.apsusc.2022.154060
- Bibcode:
- 2022ApSS..60054060L
- Keywords:
-
- Microwave absorption material;
- Carbon nanotube;
- Polyzwitterion;
- Interfacial polarization loss;
- Zwitterionic dipole;
- Effective absorption band