Rapidly self-healing, highly conductive, stretchable, body-attachable hydrogel sensor for soft electronics

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

Composites Communications Pub Date : 2024-11-13 DOI:10.1016/j.coco.2024.102158

Ashwin Khadka , Shrayas Pradhan , Edmund Samuel , Bhavana Joshi , Hao Gao , Ali Aldalbahi , Govindasami Periyasami , Hae-Seok Lee , Sam S. Yoon

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Abstract

Self-healing hydrogels are widely used in body-attachable sensors because they are stretchable, skin-friendly, highly sensitive, and mechanically strong. We developed a polyvinyl alcohol/poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) (PVA/PEDOT:PSS) hydrogel that responds rapidly and self-heals following external mechanical damage for use in body-attachable-sensor applications. The addition of ethylenediamine during hydrogel synthesis enhanced the crosslinking reaction and facilitated gelation. The hydrogel demonstrated a self-healing efficiency of 80 % and a gauge factor of 0.67 when strained in the 0–70 % range. The self-healing sensor exhibited response and recovery times of less than 0.25 s, with a self-healing time of less than 5 min. The self-healing sensor was tested for bodily motions, such as finger pressure, bending, voice vibration, severe stretching at 70 % strain, and stretching for 1000 continuous cycles.

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用于软电子设备的快速自愈合、高导电、可拉伸、可贴合人体的水凝胶传感器

自愈合水凝胶具有可拉伸、亲肤、高灵敏度和机械强度等特点，因此被广泛应用于人体附着式传感器。我们开发了一种聚乙烯醇/聚（3,4-乙烯二氧噻吩）:聚（苯乙烯磺酸）（PVA/PEDOT:PSS）水凝胶，这种水凝胶在受到外部机械损伤后能快速反应并自愈合，可用于体贴式传感器。在水凝胶合成过程中加入乙二胺可增强交联反应并促进凝胶化。水凝胶的自愈合效率为 80%，在 0-70% 的应变范围内，测量系数为 0.67。自愈合传感器的响应和恢复时间小于 0.25 秒，自愈合时间小于 5 分钟。自愈合传感器接受了身体运动测试，如手指压力、弯曲、声音振动、70% 应变的严重拉伸和 1000 次连续拉伸。

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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.