Journal
CHEMICAL ENGINEERING JOURNAL
Volume 401, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.126027
Keywords
Wrinkled surface; Carbon microspheres; Microwave absorption; Surface roughness; Interfacial polymerization
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Funding
- National Natural Science Foundation of China [21704084, 21975206]
- Shaanxi Innovative Talents Promotion Plan-the Young Star of Science and Technology Project [2019KJXX-67]
- Fundamental Research Funds for the Central Universities [310201911cx023, 3102017jc01001]
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In this work, we first thoroughly probed the structure-activity relationship between the wrinkled degree of microsphere and the microwave absorption performance. Wrinkled carbon microspheres were fabricated through soap-free living/controlled radical emulsion polymerization and interfacial initiated emulsion polymerization followed by a carbonization process. Tuning the polymerization reaction time, carbon microspheres with different wrinkled degree were obtained. The results confirmed that the wrinkled degree had a significant impact on the absorption performance. As the polymerization time and absorber loading were 8 h and 50%, the wrinkled carbon microspheres showed superior application performance. The reflection loss was -49.45 dB with a thickness of 1.9 mm, and the effective absorption bandwidth was 4.75 GHz. The maximum effective absorption bandwidth could reach 4.84 GHz. Designing rationally the surface microstructure of materials was extremely critical. It provided a new strategy for the improvement of the fixed absorbing materials on microwave absorption performance.
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