Abstract
Ultrathin electromagnetic interference shielding materials are commonly used to overcome electromagnetic pollution in applications including integrated and wearable electronics. This paper demonstrates a graphene composite with an ultrathin thickness of 43 μm manufactured using a facile and rapid spray deposition technique on a cellulose substrate. The graphene was highly oriented and densely stacked on the cellulose substrate by the spray deposition due to polyvinyl alcohol (PVA) and polyacrylic acid (PAA) introduced for increasing their self-adhesion and adhesion to the cellulose substrate. The interconnected graphene conductive networks on the cellulose were effectively formed, resulting in low electrical resistivity (0.003 Ω·m) and efficient electromagnetic shielding effectiveness (28.3 dB at the 10 GHz) of graphene/cellulose composites. It is expected that this research will be used for the effective development of electromagnetic shielding materials for multifunctional smart and wearable electronics.
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