Breathable Encapsulated Liquid Metal Foam‐Based Soft Stress Sensor

Jin Xu; Zhimin Wang; Xinxin Wang; Yali Wu; Ruizhe Xing; Tingting Yu; Yang Li; Jinping Ao; Yebo Tao; Bowen Bai; Michael D. Dickey; Dongguang Zhang; Jiayi Yang

doi:10.1002/admt.202201193

journal article·2023-03Open access

Breathable Encapsulated Liquid Metal Foam‐Based Soft Stress Sensor

Jin Xu, Zhimin Wang, Xinxin Wang, Yali Wu, Ruizhe Xing, Tingting Yu, Yang Li, Jinping Ao, Yebo Tao, Bowen Bai, Michael D. Dickey, Dongguang Zhang, Jiayi Yang

Advanced Materials Technologies· Volume 8· Issue 6

Publisher page Open full text

Source abstract

Abstract

Abstract Liquid metal (LM)‐based soft and wearable sensors have great potential for applications in human motion monitoring and human‐machine interfaces. To avoid smearing of exposed LM, it is necessary to encapsulate LM with elastomers, which decreases the breathability and results in discomfort and even skin irritation. To solve this problem, this work proposes a breathable encapsulated LM foam (BELMF)‐based soft stress sensor. By using two polydimethylsiloxane foam layers, the BELMF‐based sensor achieves non‐smearing and breathability. Meanwhile, a three‐dimensional electrode is designed to implement the electric connection without decreasing breathability. Appling stress to the BELMF‐based sensor makes the LM foam collapse and forms new conductive paths, which reduces the resistance of the sensor. The sensitivity of the BELMF‐based sensor can reach 1.4 Pa⁻¹. The mechanisms of the breathable encapsulation and the sensor are investigated through experiments and simulations. In addition, the potential applications of the BELMF‐based sensor for monitoring human motion are demonstrated.

Source: crossref · Quality: baseline

Research context

Polymers

OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Tactile and Sensory Interactions · Dielectric materials and actuators

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Astronautics Northwestern Polytechnical University Xi'an 710072 P. R. China

College of Mechanical and Vehicle Engineering Taiyuan University of Technology Taiyuan 030024 P. R. China

School of Chemistry and Chemical Engineering Northwestern Polytechnical University Xi'an 710072 P. R. China

School of Aerospace Science and Technology Xidian University Xi'an 710071 P. R. China

Ministry of Education Engineering Research Center of Internet of Things Technology Applications Jiangnan University Wuxi 214122 P. R. China

Intelligent manufacturing College Jiaxing Vocational & Technical College Jiaxing 314036 P. R. China

Department of Chemical and Biomolecular Engineering North Carolina State University Raleigh NC 27695 USA

College of Computer Science and Technology Xi'an University of Science and Technology Xi'an 710054 P. R. China

Funding

National Natural Science Foundation of China

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