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首页> 外文期刊>Journal of Applied Polymer Science >Enhanced impact resistance and electromagnetic interference shielding of carbon nanotubes films composites
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Enhanced impact resistance and electromagnetic interference shielding of carbon nanotubes films composites

机译：碳纳米管薄膜复合材料的增强抗冲击性和电磁干扰屏蔽

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摘要

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, CNT(f)exhibited excellent mechanical behavior and good energy absorption. While being introduced into laminated EP composite, the CNT(f)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 CNT(f)absorbed the impact energy by improving the delamination resistance. Additionally, the multilayered CNT(f)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 x 10(-3)J and 52.31 dB, respectively. Therefore, we demonstrated that the CNT(f)was an ideal functional reinforcement for mechanically strong and high-performance EMI shielding polymeric composites and the CNT(f)reinforced EP composite is promising in practical EMI-shielding applications.
机译：通过在环氧树脂（EP）基体中同时引入碳纳米管薄膜（CNTf）作为机械和电磁干扰屏蔽增强材料，制备了高可靠性、高性能的电磁干扰（EMI）屏蔽聚合物复合材料。根据高速摄影机记录的计算机断层扫描（CT）检测，CNT（f）表现出优异的力学性能和良好的能量吸收。当碳纳米管（f）被引入到层压EP复合材料中时，其机械性能和EMI屏蔽性能都得到了提高。通过冲击过程的CT检测研究了CNTf/EP的损伤机理，表明CNT（f）通过提高抗分层能力吸收冲击能量。此外，多层CNT（f）可以通过在复合材料中重复吸附、反射和散射来捕获和衰减进入的电磁微波，从而获得优异的EMI屏蔽性能。因此，CNTf/EP的能量吸收和总屏蔽效能分别达到4.58 x 10（-3）J和52.31 dB。因此，我们证明了CNT（f）是机械强度和高性能EMI屏蔽聚合物复合材料的理想功能增强材料，CNT（f）增强EP复合材料在实际EMI屏蔽应用中很有前景。

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