Enhanced impact resistance and electromagnetic interference shielding of carbon nanotubes films composites |
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Authors: | Hui Mei Mingyang Lu Shixiang Zhou Laifei Cheng |
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Affiliation: | Science and Technology on Thermostructural Composite Materials Laboratory, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, China |
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Abstract: | High reliability and high-performance electromagnetic interference (EMI) shielding polymeric composite was fabricated by introducing carbon nanotube films (CNTf) into an epoxy (EP) matrix as mechanical and EMI shielding reinforcement simultaneously. According to the computed tomography (CT) detection recorded by a high-speed camera, CNTf exhibited excellent mechanical behavior and good energy absorption. While being introduced into laminated EP composite, the CNTf enhanced both the mechanical performance and EMI shielding performance. The damage mechanism of CNTf/EP was studied by CT detection of the impact process, indicating that the CNTf absorbed the impact energy by improving the delamination resistance. Additionally, the multilayered CNTf can trap and attenuate the entered electromagnetic microwaves by repeated adsorption, reflection, and scattering in the composite, resulting in excellent EMI shielding performance. Consequently, the energy absorption and the total shielding effectiveness of the CNTf/EP reached to 4.58 × 10−3 J and 52.31 dB, respectively. Therefore, we demonstrated that the CNTf was an ideal functional reinforcement for mechanically strong and high-performance EMI shielding polymeric composites and the CNTf reinforced EP composite is promising in practical EMI-shielding applications. |
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Keywords: | applications composites mechanical properties |
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