Publications논문

Self-healing graphene oxide-based composite for electromagnetic interference shielding
2019-11-14 15:28:52 조회수530
Hyeon Jun Sim (a), Duck Weon Lee (a), Hyunsoo Kim (a), Yongwoo Jang (a), Geoffrey M. Spinks (b), Sanjeev Gambhir (b), David L. Officer (b), Gordon G. Wallace (b), Seon Jeong Kim (a, *) a) Center for Self-Powered Actuation, Department of Biomedical Engineering, Hanyang University, Seoul, 04763, South Korea // b) Intelligent Polymer Research Institute, ARC Centre of Excellence for Electro materials Science, AIIM Facility, Innovation Campus, University of Wollongong, North Wollongong, NSW, 2522, Australia 원문 링크 : https://www.sciencedirect.com/science/article/pii/S0008622319308838

Abstract

The electromagnetic pollution issues have been arising from the fast-growing development for electronic devices. Hence, the demand for materials with high electromagnetic interference (EMI) shielding performance has increased. Here, we developed self-healable, flexible and printable graphene oxide/silver nanowire films and textiles with excellent EMI shielding performance. The maximum electromagnetic interference shielding effectiveness (EMI SE) of 92 dB was recorded for an 18 μm-thickness film. In addition, the specific EMI shielding effectiveness was 31 dB cm3/g or 48,275 dB cm2/g when normalized to film thickness. Both values are higher than reported EMI shielding products. The composite film and coated textile were tolerant of damage induced by cracking or scratching. Damaging the films by cracking reduced the electrical conductivity, mechanical properties, and the EMI SE was decreased from 72 dB to 56 dB at 8.2 GHz. After the healing process, the EMI SE was recovered to 71 dB and mechanical properties restored. The EMI SE of textile reached a maximum of 30 dB which is suitable to use as a commercial EMI shielding product. In addition, the textile exhibited high flexibility, and showed excellent mechanical stability with no change in performance after 1000 bending cycles. 

 
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