A flexible sandwich-structured composite film for EMI shielding, thermal management, stress sensing and flame retardancy in wearable electronics

IF 6.5 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2025-03-22 DOI:10.1016/j.coco.2025.102375

Lin Yang , Changgeng Li , Tongle Pu , Yunjun Ruan , Tong Guo

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引用次数: 0

Abstract

The increasing demand for wearable electronics necessitates multifunctional composite films with capabilities such as electromagnetic interference (EMI) shielding, thermal management, and stress sensing. Herein, a flexible multifunctional composite film (PMF) with a sandwich structure was fabricated using a simple vacuum filtration. The multifunctionality and balance of the PMF film are primarily derived from the middle layer of its sandwich structure, which is composed of a blend of MXene, phase change materials, and cellulose nanofibers. This unique composition imparts excellent electrical conductivity, thermal conductivity, heat storage capacity, and mechanical properties to the composite film. Consequently, the PMF film exhibits superior mechanical performance (tensile strength: 20.3 MPa, elongation: 22.5 %), EMI shielding (34.8 dB and 7356.93 dB cm² g⁻¹), and efficient thermal management under light exposure (ΔT: 16 °C–43 °C within 95 s). The polyvinyl alcohol outer layers of the sandwich structure offer a flexible substrate and protect MXene from oxidation. Additionally, the PMF film functions as a stress sensor, capable of monitoring wrist flexion, finger bending, and vocal cord vibrations, while also offering flame retardancy. In conclusion, this meticulously engineered PMF film has significant potential for applications in wearable electronics, because of the combination of EMI shielding, thermal management, stress sensing, and flame resistance.

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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.