Abstract
AbstractHigh 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, CNTfexhibited excellent mechanical behavior and good energy absorption. While being introduced into laminated EP composite, the CNTfenhanced 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 CNTfabsorbed the impact energy by improving the delamination resistance. Additionally, the multilayered CNTfcan 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 × 10−3J and 52.31 dB, respectively. Therefore, we demonstrated that the CNTfwas an ideal functional reinforcement for mechanically strong and high‐performance EMI shielding polymeric composites and the CNTfreinforced EP composite is promising in practical EMI‐shielding applications.
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