3D printing of carbon black/polypropylene composites with excellent microwave absorption performance

By L. Lei, Z. Yao, Jintang Zhou, Bo Wei, Huiyuan Fan. 2020

147 citations recorded by the source corpus.

Abstract 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.

Subfields: Aerospace Engineering, Electronic, Optical and Magnetic Materials, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/e7f8704c52d960880daaab1fc451d69287619bf2