Intrinsically conductive and highly stretchable liquid metal/carbon nanotube/elastomer composites for strain sensing and electromagnetic wave absorption

IF 23.2 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Advanced Composites and Hybrid Materials Pub Date : 2024-11-30 DOI:10.1007/s42114-024-01093-0

Haeji Kim, Gangmin Kim, Jae Hyun Kang, Min Ji Oh, Nadeem Qaiser, Byungil Hwang

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引用次数: 0

Abstract

Wearable strain sensors translate mechanical deformations into electrical signals for healthcare monitoring. However, the limited ductility of conductive metals and polymers to maintain its conductivity under high degree of mechanical deformation is a crucial problem in existing fabrication methods for strain sensors. In this study, an intrinsically conductive and highly stretchable liquid metal (LM)/carbon nanotube (CNT)/polydimethylsiloxane (PDMS) composite-based wearable strain sensor with electromagnetic wave (EMW)-absorbing properties was explored. The effect of CNT inclusion in the LM/PDMS composites was investigated, revealing enhanced electrical conductivity and EMW-absorbing characteristics without additional mechanical sintering. Through a comprehensive evaluation considering electrical resistance, stretchability, and EMW-absorbing properties, LM/CNT/PDMS composites with 1.5 wt% CNT were determined to exhibit optimal performance as EMW absorbable strain sensors. The characterization of the electromechanical properties demonstrated the high stretchability and mechanical reliability of the resulting material with a gauge factor of 5.35 within the strain range of 50–100% and a low hysteresis under a stain of 80%, confirming the reliability of the fabricated sensor. The practical performance of the LM/CNT/PDMS composites was analyzed by adhering them to various parts of the body with joints and measuring the changes in their relative resistance, affirming their potential for use in healthcare monitoring devices for point-of-care testing (POCT) that require electromechanical reliability under repeated tensile deformation.

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来源期刊

Advanced Composites and Hybrid Materials Multiple-

CiteScore

26.00

自引率

21.40%

发文量

185

期刊介绍： Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field. The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest. Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials. Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.