Epoxy-based nano-composites can be ideal electro-magnetic interference(EMI)-shielding materials owing to their lightness,chemical inertness,and mechanical durability.However,poor conductivity and brittleness of the epoxy resin are challenges for fast-growing portable and flexible EMI-shielding applications,such as smart wristband,medical cloth,aerospace,and military equipment.In this study,we explored hybrid nanofillers of single-walled carbon nanotubes(SWCNT)/reduced graphene oxide(rGO)as conductive inks and polyester fabrics(PFs)as a substrate for flexible EMI-shielding composites.The highest electrical conductivity and fracture toughness of the SWCNT/rGO/PF/epoxy composites were 30.2 S m-1 and 38.5 MPa m1/2,which are～270 and 65％enhancement over those of the composites without SWCNTs,respectively.Excellent mechanical durability was demonstrated by stable electrical conductivity retention during 1000 cycles of bending test.An EMI-shielding effectiveness of～41 dB in the X-band frequency of 8.2-12.4 GHz with a thickness of 0.6 mm was obtained with an EM absorption-dominant behavior over a 0.7 absorption coefficient.These results are attributed to the hierarchical architecture of the macroscale PF skeleton and nanoscale SWCNT/rGO networks,leading to superior EMI-shielding performance.We believe that this approach provides highly flexible and robust EMI-shielding composites for next-generation wearable electronic devices.

Jong-Hoon Lee;Yoon-Sub Kim;Hea-Jin Ru;Seul-Yi Lee;Soo-Jin Park

Department of Chemistry,Inha University,100 Inharo,Incheon 22212,Korea;Korea Architecture Safety Testing and Research Institute(KASTI),88 Gasan Digital 1-ro,Seoul 08590,Korea

纳微快报（英文）

[1]Jong-Hoon Lee;Yoon-Sub Kim;Hea-Jin Ru;Seul-Yi Lee;Soo-Jin Park-.Highly Flexible Fabrics/Epoxy Composites with Hybrid Carbon Nanofillers for Absorption-Dominated Electromagnetic Interference Shielding)[J].纳微快报（英文）,2022(11):307-323

Nanofillers,Dominated,wristband

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