Abstract
High-performance multifunctional EMI shielding composite fabricated by low-cost method is increasingly required. Herein, novel EMI shielding nanocomposite laminates, consisting of composite prepreg of carbon fiber/epoxy resin/carbon nanotube film, were manufactured by facile electric heating of carbon nanotube film. The results indicated that composite with excellent specific shielding effectiveness of 0.07 dB/μm, 47 dB cm3/g and metamaterial properties can be designed by composite prepreg, and the primary shielding mechanism of it was reflection loss, along with interface polarization loss and conductive loss, which was superior to lots of shielding materials including carbon nanotube-based, carbon black-based, carbon nanofiber-based and graphene-based materials reported previously. Meanwhile, highly required excellent properties, including the thermostability with initial decomposition temperature up to 300 °C, hydrophobicity over contact angle of 115°, corrosion resistance of the composite with metal-free modification, and function as structural laminate compared with previous studies were demonstrated, which suggested tremendous potentials of the multifunctional EMI shielding composites in harsh environment.
Highlights
Carbon nanotube film (CNTF) were made using floating catalyst chemistry vapor deposit (FCCVD) method, which was detailed in a previous publication [18]
The cross-section microscope images of samples 1, 2 and 4 were revealed in Supplementary Materials Figure S1, which were cured by means of oven, hot press and CNTF
The void-free layered structure of samples 2 and 4 can be clearly observed, while the micropore can be found in sample 1 as shown in Supplementary Materials Figure S1a, indicating that the hot press and e-heating are efficient fabrication methods compared to oven in terms of structural integrity
Summary
Carbon nanotubes (CNTs) offer substantial advantages over traditional metal EMI shielding materials in this respect due to their excellent electrical conductivity, mechanical strength, thermal stability and low density [1], arousing strong interest in it as conductive fillers of EMI shielding materials recently. Shielding composites with CNT powder and polymer matrix, such as ultra-high molecular weight polyethylene [2], epoxy resin [3], cellulose [4], natural rubber [5], polystyrene [6], polymethyl methacrylate [7], polycarbonate [8], etc., have been fabricated by solution process, dry mixing or melt mixing etc., the poor quality of the dispersion and lower carbon nanotube contents are the major limitation for applications of CNTs/polymer composites as shielding materials
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
