Self-healing graphene oxide-based composite for electromagnetic interference shielding
Self-healing graphene oxide-based composite for electromagnetic interference shielding
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DOI：
10.1016/j.carbon.2019.08.073
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发表时间：
2019-12
期刊：
影响因子：
10.9
通讯作者：
Hyeon Jun Sim;Duck Weon Lee;Hyunsook Kim;Yong-Rae Jang;G. Spinks;Sanjeev Gambhir;D. Officer;G. Wallace;S. J. Kim
中科院分区：
文献类型：
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作者：
Hyeon Jun Sim;Duck Weon Lee;Hyunsook Kim;Yong-Rae Jang;G. Spinks;Sanjeev Gambhir;D. Officer;G. Wallace;S. J. Kim
随着电子设备的快速发展，电磁污染问题日益突出。因此，对具有高电磁干扰（EMI）屏蔽性能的材料的需求已经增加。在这里，我们开发了具有优异EMI屏蔽性能的可自愈、柔性和可印刷的氧化石墨烯/银纳米线薄膜和纺织品。对于18 μ m厚的膜，记录到92 dB的最大电磁干扰屏蔽效能（EMI SE）。此外，当归一化到膜厚度时，比EMI屏蔽效能为31 dB cm 3/g或48，275 dB cm 2/g。这两个值都高于报告的EMI屏蔽产品。复合膜和涂覆的织物耐受由破裂或刮擦引起的损坏。通过开裂破坏膜降低了导电性、机械性能，并且在8.2GHz下EMI SE从72 dB降低到56 dB。愈合过程后，EMI SE恢复到71 dB，机械性能恢复。纺织品的EMI SE最大达到30 dB，适合用作商业EMI屏蔽产品。此外，该织物表现出高柔韧性，并显示出优异的机械稳定性，在1000次弯曲循环后性能没有变化。
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.