具有强大耐磨性和传感能力的柔性传感器：对微裂纹结构、多重界面键和可能传感机制的洞察,ACS Sustainable Chemistry & Engineering

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具有强大耐磨性和传感能力的柔性传感器：对微裂纹结构、多重界面键和可能传感机制的洞察
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-04-07 , DOI: 10.1021/acssuschemeng.2c07763
Bin Xue ₁ , Hou-Yong Yu _{1,

2} , Chengling Huang ₁ , Somia Yassin Hussain Abdalkarim ₁ , Xiang Chen ₁ , Chuang Wang ₁ , Xia He ₁ , Yanjuan Dong ₁

Affiliation

随着可穿戴智能设备的快速增长，迫切需要具有广泛应变传感范围和高灵敏度的柔性传感器。此外，柔性可穿戴电子设备对各种信号捕获的敏感性取决于多个界面键相互作用和微观结构。然而，没有多个界面键合的柔性传感器具有较差的机械性能、低灵敏度/电导率和单一传感功能，限制了传感器的商业应用。在这项工作中，采用新型浸涂技术设计了一种基于聚乙烯醇的柔性传感器，该传感器具有多重界面键相互作用和微裂纹结构。有趣的是，该传感器表现出高灵敏度，应变系数 > 100，高电导率 356 mS m ^–1、令人印象深刻的热灵敏度 (0.01071 °C ^–1 )、344.5% 的大应变以及出色的耐磨性和耐用性。已经提出了多种刺激下可能的传感机制。此外，具有多种信号监测功能的柔性传感器可以监测实时全方位人体运动和物理信号采集，为开发这种在柔性传感器和运动应用中具有出色性能的传感器提供了一种有前途的策略。

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Flexible Sensors with Robust Wear-Resistant and Sensing Ability: Insight on the Microcrack Structure, Multiple Interfacial Bonds, and Possible Sensing Mechanisms

With the fast growth of wearable intelligent devices, flexible sensors with a broad strain sensing range and high sensitivity are in urgent demand. Furthermore, the sensitivity of flexible wearable electronic devices to various signal capture depends on multiple interfacial bond interactions and a microstructure. However, a flexible sensor without multiple interfacial bonds has poor mechanical properties, low sensitivity/conductivity, and single sensing function to limit commercial sensor application. In this work, the novel dip-coating technique was used to design a flexible sensor based on polyvinyl alcohol with multiple interfacial bond interactions and a microcrack structure. Interestingly, the sensor exhibits high sensitivity with gauge factor > 100, a high conductivity of 356 mS m^–1, impressive thermal sensitivity (0.01071 °C^–1), a large strain of 344.5%, and excellent wear-resistance and durability. Possible sensing mechanisms under multiple stimuli have been presented. Moreover, flexible sensors with multiple signal monitoring can monitor real-time full-range human body motion and physical signal collection, providing a promising strategy to develop this sensor with outstanding performance in flexible sensor and sporting applications.

更新日期：2023-04-07

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