Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 200, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2020.108479
Keywords
3D printing; Microwave absorption; Polypropylene; Dielectric
Categories
Funding
- National Natural Science Foundation of China [51702158]
- Fundamental Research Funds for the Central Universities [NP2018111]
- Open Fund of Key Laboratory of Materials Preparation and Protection for Harsh Environment (Nanjing University of Aeronautics and Astronautics), Ministry of Industry and Information Technology [56XCA19013-05]
- Foundation of the Graduate Innovation Center, Nanjing University of Aeronautics and Astronautics [kfjj20190619]
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3D printing in virtue of strong designability has incomparable advantages in material composition and structural design. In this work, carbon black/polypropylene composite with various contents of carbon black (CB) were successfully prepared by fused deposition modeling. When the CB content is 10%, uniformly dispersion of particles in the matrix with little agglomeration, and the corresponding composite exhibits the excellent microwave absorption and broad effective bandwidth. The maximum reflection loss value reached -39.15 dB at 15.08 GHz, and the corresponding effective bandwidth is 5.63 GHz (12.37-18 GHz) with a thickness of 2.1 mm. At the same time, when the thickness is 2.8 mm, the maximum reflection value is up to -62.6 dB at 10.64 GHz with an effective bandwidth of 4.56 GHz (8.88-13.44 GHz). The composite containing 10 wt% CB has conductive loss, polarization loss, and suitable impedance matching, resulting in superior microwave absorption. 3D printing technology provides a more efficient method for the preparation of microwave absorbing materials.
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