期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 121, 期 -, 页码 139-148出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2019.03.019
关键词
Polymer-matrix composites; Electrical properties; Magnetic properties; Microstructures
资金
- National Natural Science Foundation of China [11872338]
- Henan Province Natural Science Project of China [17A430005, 19B430011]
Flexible Poly (vinylidene fluoride) (PVDF)/Fe3O4/carbon films were prepared through the solution processing and compression molding method. The electrical conductivity and the electromagnetic interference (EMI) shielding properties of these composites were gradually increased with the increasing of CNTs or GNPs content, as well as the film thickness. Total shielding of the 8 wt% CNTs (Carbon Nanotubes) and GNPs (Graphenes) filled PVDF/Fe3O4 composites increased from 14.1 to 32.7 dB, and 16.2 to 35.6 dB, while the film thickness was increased from 0.5 to 1.1 mm, respectively. Due to the synergetic effect of Fe3O4 nanoparticles and CNTs or GNPs, the final EMI shielding of the composites could be mainly attributed to the absorption process. Moreover, the fabricated films possess higher thermal conductivities, which can convert microwave energy into Joule heating systems. These functional films have the potential usage in making high-efficiency EMI shielding devices with rapid heat dissipation.
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