Multifunctional CCNT-Co@CNT/polyimide composite films for electromagnetic interference shielding and Joule heating

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2025-06-28 DOI:10.1016/j.coco.2025.102521

Min Chao, Xuexue Yang, Shi Liu, Xuhai Tang, Chunjia Luo, Xi Chen, Luke Yan

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Abstract

As the fast advancement of communication technologies and flexible electronics, the demand for multifunctional electromagnetic interference (EMI) shielding materials for special applications is increasing. Herein, we fabricated flexible, multifunctional carboxylate carbon nanotubes-Co@carbon nanotube/polyimide (PCCo) composite films for EMI shielding and Joule heating using a simple scraping coating method followed by a thermal treatment. The addition of carboxylated carbon nanotubes (CCNT) and Co@carbon nanotube (Co@CNT) increased conductivity of PCCo film while also achieving efficient impedance matching. With a thickness of only 70 μm, the film demonstrates an EMI shielding effectiveness (EMI SE) of 31.91 dB along with a specific shielding effectiveness (SSE) as high as 455.71 dB/mm, while also maintaining long-term stability under extreme conditions. Additionally, the film can rapidly reach 144.5 °C under a 6 V voltage and demonstrates excellent prolonged Joule heating stability. Therefore, the fabricated composite film holds significant promise in communication devices and wearable technology applications.

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用于电磁干扰屏蔽和焦耳加热的多功能CCNT-Co@CNT/聚酰亚胺复合薄膜

随着通信技术和柔性电子技术的快速发展，对特殊用途的多功能电磁干扰屏蔽材料的需求日益增加。在此，我们采用简单的刮涂法和热处理制备了柔性的多功能羧酸碳nanotubes-Co@carbon纳米管/聚酰亚胺（PCCo）复合薄膜，用于电磁干扰屏蔽和焦耳加热。羧基化碳纳米管（CCNT）和Co@carbon纳米管（Co@CNT）的加入提高了PCCo薄膜的电导率，同时也实现了高效的阻抗匹配。该薄膜的厚度仅为70 μm， EMI屏蔽效率（EMI SE）为31.91 dB，比屏蔽效率（SSE）高达455.71 dB/mm，同时在极端条件下也能保持长期稳定性。此外，该薄膜可以在6v电压下快速达到144.5°C，并表现出优异的长焦耳加热稳定性。因此，制备的复合薄膜在通信设备和可穿戴技术应用中具有重要的前景。

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来源期刊

Composites Communications Materials Science-Ceramics and Composites

CiteScore

12.10

自引率

10.00%

发文量

340

审稿时长

36 days

期刊介绍： Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.