期刊
CARBON
卷 132, 期 -, 页码 32-41出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2018.02.001
关键词
Electromagnetic interference shielding; Electroless Ni plating; Composite film; Sandwiched structure; Carbon fiber; Nonwoven fabric
资金
- National Natural Science Foundation of China [51375175, 51775197]
- Natural Science Foundation of Guangdong Province, China [2015A030313201, 2014A030312017]
- Science and Technology Planning Project of Guangdong Province, China [2015A010105007]
We report in this work a highly flexible, mechanically robust, and ultra-thin Ni-plated nonwoven carbon fabric/polycarbonate (CF/PC/Ni) film that exhibits outstanding electromagnetic interface (EMI) shielding performance. This composite film is fabricated through a four-step process - fabrication of nonwoven carbon fiber/polypropylene/polyethylene (CEF-NF) fabric, catalytic seeding and sensitization, electroless Ni plating, and lamination with polycarbonate. The as-fabricated ultra-thin (0.31 mm) CF/PC/Ni film exhibits superior EMI shielding effectiveness (EMI-SE) of 72.7 dB, which is close to 3 x that of an identical film with no Ni plating (25 dB)- ddemonstrating Ni plating can substantially improve the EMI shielding performance. Compared with similar lightweight EMI-shielding materials, this CF/PC/Ni film shows a superior EMI-SE at lower density and smaller thickness (1376.1 dB cm(2) g(-1)). 40 min of Ni plating (yielding a Ni thickness of 1.075 mm), followed by 2 MPa of laminating pressure at 190 degrees C of laminating temperature were found to provide optimal EMI shielding performance. Based on reliability study, the CF/PC/Ni film retains 96.36% of its EMI-SE after 5000 cycles of mechanical bending and 50 h of heating. Therefore, the CF/PC/Ni film exhibits outstanding flexibility, good mechanical strength, and remarkable electrical properties, making it an excellent EMI shielding material. (C) 2018 Elsevier Ltd. All rights reserved.
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