An Electromagnetic Interference Shielding Nanocomposite Film Based on Graphene Nanoplate and a Functional aromatic Matrix
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An electromagnetic interference (EMI) shielding nanocomposite film is prepared and its structural, mechanical, and electrical properties are characterized in this study. A water-soluble aromatic matrix is synthesized by reacting aromatic diol (dihydroxynaphthalene or dihydroxyanthracene), 2,2-bis(hydroxymethyl) propionic acid, poly(ethylene glycol), and isophorone diisocyanate. A series of EMI shield films are prepared by blending graphene nanoplates, polymeric conductive surfactants, cellulose nanofibers, and a water-soluble matrix. In comparison to the EMI shielding films based on non-aromatic matrix, the films based on aromatic matrix exhibit enhanced EMI shielding effect and mechanical properties. Interestingly, the anthracene-based film demonstrates a greater EMI shielding effect than the naphthalene-based film. These are attributed to the stiffness of the aromatic matrix, which results in the effective multiple reflections of electromagnetic waves being successfully induced.