Moisture-responsive ultralow-hysteresis polymer ionogels for adhesion-switchable strain sensing.

IF 12.2 2区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Materials Horizons Pub Date : 2025-01-14 DOI:10.1039/d4mh01593b

Yichen Zhou, Xing Zhang, Ying Zheng, Junfeng Liu, Yongzhong Bao, Guorong Shan, Chengtao Yu, Pengju Pan

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Abstract

Adhesion-switchable ultralow-hysteresis polymer ionogels are highly demanded in soft electronics to avoid debonding damage and signal distortion, yet the design and fabrication of such ionogels are challenging. Herein, we propose a novel method to design switchable adhesive ionogels by using binary ionic solvents with two opposite-affinity ionic components. The obtained ionogels exhibit moisture-induced phase separation, facilitating switchable adhesion with a high detaching efficiency (>99%). Moreover, before and after phase separation, the viscoelastic behavior of the ionogels is maintained in the rubbery plateau region within common frequency ranges with ultralow mechanical hysteresis (∼3%) under large strain, enabling accurate and stable strain and pressure sensing. Accordingly, the ionogel films can be used as functional elements in a smart clamp to realize flytrap-like selective activation, based on high sensitivity to the vibration intensity from the targeted prey. This work may inspire future research on the development of advanced soft electronics.

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用于粘附切换应变传感的湿响应超低迟滞聚合物离子凝胶。

可粘附切换的超低迟滞聚合物离子凝胶在软电子产品中非常需要，以避免脱粘损伤和信号失真，但这种离子凝胶的设计和制造具有挑战性。在此，我们提出了一种新的方法，利用具有两个相反亲和力的离子组分的二元离子溶剂来设计可切换的粘接离子凝胶。所获得的离子凝胶表现出水分诱导的相分离，促进了可切换的粘附，具有很高的分离效率（>99%）。此外，在相分离前后，离子凝胶的粘弹性行为在橡胶高原区域保持在共同频率范围内，在大应变下具有超低的机械滞后（~ 3%），从而实现准确和稳定的应变和压力传感。因此，基于对目标猎物振动强度的高灵敏度，离子凝胶膜可以用作智能钳中的功能元件，实现类似捕蝇器的选择性激活。这项工作可能会激发未来对先进软电子技术发展的研究。

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来源期刊

Materials Horizons CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

18.90

自引率

2.30%

发文量

306

审稿时长

1.3 months

期刊介绍： Materials Horizons is a leading journal in materials science that focuses on publishing exceptionally high-quality and innovative research. The journal prioritizes original research that introduces new concepts or ways of thinking, rather than solely reporting technological advancements. However, groundbreaking articles featuring record-breaking material performance may also be published. To be considered for publication, the work must be of significant interest to our community-spanning readership. Starting from 2021, all articles published in Materials Horizons will be indexed in MEDLINE©. The journal publishes various types of articles, including Communications, Reviews, Opinion pieces, Focus articles, and Comments. It serves as a core journal for researchers from academia, government, and industry across all areas of materials research. Materials Horizons is a Transformative Journal and compliant with Plan S. It has an impact factor of 13.3 and is indexed in MEDLINE.