Abstract
To manufacture desired shielding materials, nonwoven fabrics with welding-network, ciliated-like and random orientation structure were utilized as the reinforcement and conducting framework. The welding-network provided a more effective highway for electron transport and the ciliated-like structures enhanced the multiple reflection and the interface polarization. Consequently, an exceptional EMI shielding effectiveness (up to 2575.7 dB cm3 g−1) and absolute shielding effectiveness (38181.8 dB cm2 g−1) values in ranges of 30–3000 MHz were achieved for the epoxy nanocomposite, which were far better than those of nonwoven fabric, graphene and carbon nanotube-based epoxy nanocomposites. More importantly, the fiber-welded ciliated-like nonwoven fabric showed a great potential for preparing high-strength polymer-based composites, which significantly increased the tensile and bending strength by 152% and 75% to epoxy. These results exhibited an alternative approach to exploit the potentials of carbon fiber-based nonwoven fabrics for developing advanced multifunctional materials.
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