Highly Flexible Fabrics/Epoxy Composites with Hybrid Carbon Nanofillers for Absorption-Dominated Electromagnetic Interference Shielding  

作　　者：Jong-Hoon Lee Yoon-Sub Kim Hea-Jin Ru Seul-Yi Lee Soo-Jin Park 

机构地区：[1]Department of Chemistry,Inha University,100 Inharo,Incheon 22212,Korea [2]Korea Architecture Safety Testing and Research Institute(KASTI),88 Gasan Digital 1-ro,Seoul 08590,Korea

出　　处：《Nano-Micro Letters》2022年第11期307-323,共17页纳微快报（英文版）

基　　金：supported by the National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT)(No.2022M3J7A1062940).

摘　　要：Epoxy-based nano-composites can be ideal electromagnetic 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 m^(1/2),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.

关 键 词：Conductive polymer composites Fracture toughness Flexible composites Absorption-dominated electromagnetic interference shielding 

分 类 号：TB332[一般工业技术—材料科学与工程]