3D graphene/carbon nanotubes/polydimethylsiloxane composites as high-performance electromagnetic shielding material in X-band

被引：92
作者：
Jia, Hui [1 ,2 ]
Kong, Qing-Qiang [1 ,2 ]
Liu, Zhuo [1 ]
Wei, Xian-Xian [3 ]
Li, Xiao-Ming [1 ]
Chen, Jing-Peng [1 ,2 ]
Li, Feng [1 ,2 ]
Yang, Xiao [1 ,2 ]
Sun, Guo-Hua [1 ]
Chen, Cheng-Meng [1 ]
机构：
[1] Chinese Acad Sci, Inst Coal Chem, CAS Key Lab Carbon Mat, Taiyuan 030001, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Taiyuan Univ Sci & Technol, Sch Environm & Safety, Taiyuan 030024, Peoples R China
来源：
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2020年 / 129卷
关键词：
3D graphene/MWCNTs foam; Electromagnetic interference shielding; Polarization loss; Ohmic loss; POLY(LACTIC ACID)/SILVER NANOCOMPOSITES; ELECTRICAL-CONDUCTIVITY; FOAM/EPOXY NANOCOMPOSITES; CARBON NANOTUBES; OXIDE; LIGHTWEIGHT; ABSORPTION; FILM; GRAPHITE; FOAM;
D O I：
10.1016/j.compositesa.2019.105712
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
High-performance electromagnetic shielding materials are highly desired due to the radiation and interference problems of electronic equipment. In this work, a flexible graphene/multi-walled carbon nanotubes (MWCNTs)/ Polydimethylsiloxane (PDMS) electromagnetic shielding composite is fabricated with 3D graphene/MWCNTs foam as electrical conductive skeleton. The structure and composition evolution of foams are studied during the carbonization process from 1200 to 1600 degrees C and the graphitization of ultra-high temperature (2800 degrees C). With the removal of functional groups, the repair of defects enhances the ohmic loss while the polarization loss is reduced. An optimal electromagnetic interference shielding effectiveness (EMI SE)is found with an EMI SE of 54.43 dB at 1400 degrees C. Moreover, compared to pure PDMS, the thermal conductivity of the composites is increased by 193% and the compressive strength is improved from 1.40 MPa to 1.94 MPa. This contribution provides a guidance for designing high-performance carbon-based electromagnetic shielding materials.
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页数：9
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