Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 118, Issue -, Pages 178-185Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2015.08.023
Keywords
Polymer-matrix composites (PMCs); Functional composites; Electrical properties
Categories
Funding
- National Natural Science Foundation of China [51103007, 51125010, 51373011]
- Fundamental Research Funds for the Central Universities [YS201402]
- State Key Laboratory of Organic-Inorganic Composites [201501007]
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Magnetic and electrically conductive epoxy nanocomposites are fabricated by compounding thermally reduced graphene oxide (TGO) and magnetic carbonyl iron (CI) using a solvent-free and efficient centrifugal mixing method. The addition of TGO sheets not only forms an interconnected conducting network within the epoxy matrix, but also prevents the aggregation of heavy Cl components. The incorporation of Cl components leads to obvious increases in permeability, magnetic loss, and electromagnetic interference (EMI) shielding properties. Among different shapes of Cl components, spherical Cl particles result in the best EMI shielding performance. The ternary nanocomposites exhibit excellent shielding effectiveness (>36 dB within 9.5-12 GHz) and a maximum value of similar to 40 dB at 11.7 GHz, much higher than that (similar to 20 dB) of epoxy/TGO nanocomposite with the same content of TGO. Wave absorption loss is confirmed to be the main EMI shielding mechanism for the epoxy nanocomposites. The high EMI shielding performance makes the epoxy nanocomposites promising for EMI shielding applications. (C) 2015 Elsevier Ltd. All rights reserved.
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