Wavy-microstructure-sandwiched flexible composite towards wearable monitoring and acoustic detecting

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2025-09-10 DOI:10.1016/j.compositesb.2025.113023

Danyi Li , Zimu Li , Shilong Duan , Congcong Lou , Wenwen Li , Ziyang Fan , Xinglong Gong , Honghao Ma , Shouhu Xuan

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引用次数: 0

Abstract

Flexible composites have been widely used in smart wearable devices, in which the composites with superior mechanical properties and the abilities to sense multiple physical fields in complex environments have garnered increasing attention. This paper reports a bionic wave structured multifunctional flexible composite (MPAP) which possesses multi-modal response characteristics. MPAP can respond to various mechanical stimuli and generate positive/negative electrical signals in response to bending loads in different directions, allowing for the differentiation of bending directions. The sensitivity reaches −12.88 × 10⁻² mm⁻¹ and 16.02 × 10⁻² mm⁻¹ under in-plane and out-of-plane bending, respectively. When integrated into a Bluetooth sensing gloves, it accurately recognizes different sign language letters. Moreover, due to the enhanced acoustic contact area, the wavy-microstructure enables the MPAP to monitor small changes in acoustic intensity, with a sensitivity of 3.44 dB/%. Based on this feature, a sound volume alarm device has been developed to monitor and alert environments with excessive decibel levels in real-time. Furthermore, MPAP exhibits excellent electromagnetic shielding and electric heating performance. Therefore, this randomly distributed wavy-microstructure synergistically enhances the acousto-mechano-electric coupling effect, overcoming the single-function limitation of traditional flexible composite. This innovation offers novel solutions for wearable health monitoring, intelligent security and environmental perception.

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波浪形微结构夹层柔性复合材料用于可穿戴监测和声学探测

柔性复合材料在智能可穿戴设备中得到了广泛的应用，其具有优异的力学性能和在复杂环境中感知多种物理场的能力越来越受到人们的关注。报道了一种具有多模态响应特性的仿生波结构多功能柔性复合材料（MPAP）。MPAP可以响应各种机械刺激，并根据不同方向的弯曲载荷产生正/负电信号，从而实现弯曲方向的分化。面内弯曲和面外弯曲的灵敏度分别达到−12.88 × 10−2mm−1和16.02 × 10−2mm−1。当集成到蓝牙感应手套中时，它可以准确识别不同的手语字母。此外，由于增强了声接触面积，波状微结构使MPAP能够监测声强的微小变化，灵敏度为3.44 dB/%。基于这一特性，开发了一种音量报警装置，用于实时监测和警报分贝过高的环境。此外，MPAP还具有良好的电磁屏蔽和电热性能。因此，这种随机分布的波动-微观结构协同增强了声-机电耦合效应，克服了传统柔性复合材料单一功能的局限性。这一创新为可穿戴健康监测、智能安全和环境感知提供了新颖的解决方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.