Self-healing strain sensor based on silicone elastomer for human motion detection

Shan, Yifei; Li, Zhixi; Yu, Tianwen; Wang, Xiaoxiao; Cui, Huanan; Yang, Kun; Cui, Yongyan

doi:10.1016/j.compscitech.2021.109208

Cited by 33 publications

(22 citation statements)

References 47 publications

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“…The characteristic peak of PPy at 3420 cm −1 is caused by the stretching vibration of N−H. 50,51 The characteristic peaks of pure MXene, HEC, and PPy are contained in the MXene/PPy/HEC, which states the successful preparation of the composite. Figure 2c−f are the scanning electron microscopy image of PPy/HEC, MXene, PPy, and MXene/HEC/PPy composites.…”

Section: Characterizations and Measurementsmentioning

confidence: 97%

In Situ Polymerized MXene/Polypyrrole/Hydroxyethyl Cellulose-Based Flexible Strain Sensor Enabled by Machine Learning for Handwriting Recognition

Yang

Zhang

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Flexible strain sensors have significant progress in the fields of human–computer interaction, medical monitoring, and handwriting recognition, but they also face many challenges such as the capture of weak signals, comprehensive acquisition of the information, and accurate recognition. Flexible strain sensors can sense externally applied deformations, accurately measure human motion and physiological signals, and record signal characteristics of handwritten text. Herein, we prepare a sandwich-structured flexible strain sensor based on an MXene/polypyrrole/hydroxyethyl cellulose (MXene/PPy/HEC) conductive material and a PDMS flexible substrate. The sensor features a wide linear strain detection range (0–94%), high sensitivity (gauge factor 357.5), reliable repeatability (>1300 cycles), ultrafast response–recovery time (300 ms), and other excellent sensing properties. The MXene/PPy/HEC sensor can detect human physiological activities, exhibiting excellent performance in measuring external strain changes and real-time motion detection. In addition, the signals of English words, Arabic numerals, and Chinese characters handwritten by volunteers measured by the MXene/PPy/HEC sensor have unique characteristics. Through machine learning technology, different handwritten characters are successfully identified, and the recognition accuracy is higher than 96%. The results show that the MXene/PPy/HEC sensor has a significant impact in the fields of human motion detection, medical and health monitoring, and handwriting recognition.

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Section: Characterizations and Measurementsmentioning

confidence: 97%

In Situ Polymerized MXene/Polypyrrole/Hydroxyethyl Cellulose-Based Flexible Strain Sensor Enabled by Machine Learning for Handwriting Recognition

Yang

Zhang

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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“…Based on different working principles, diverse flexible force-responsive sensing materials have been reported via introducing functional nanomaterials in the supporting polymer substrate with specific micro/nano-structure design [ 2 , 37 , 38 ]. Generally, these nanomaterials cover low-dimensional carbons (e.g., carbon blacks (CBs), carbon nanotubes (CNTs), graphene, MXenes) [ 39 ], metal-based conductive fillers (e.g., silver nanowires (Ag NW), gold nanoparticles, liquid metal) [ 40 ], conducting polymer-based fillers (e.g., polyaniline (PANI), polypyrrole (PPY), polythiophene, poly(3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT:PSS)) [ 41 ] and their hybrid conductive fillers (CNTs/graphene hybrid filler) [ 42 ]. As for flexible and stretchable supporting polymer matrix, elastic rubbers, fibers, fabrics, and foams are the popularly used ones for flexible force-sensitive sensors [ 5 , 9 , 11 ].…”

Section: Multiple-stimuli-responsive E-skinmentioning

confidence: 99%

Recent Advances in Electronic Skins with Multiple-Stimuli-Responsive and Self-Healing Abilities

2022

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Wearable electronic skin (e-skin) has provided a revolutionized way to intelligently sense environmental stimuli, which shows prospective applications in health monitoring, artificial intelligence and prosthetics fields. Drawn inspiration from biological skins, developing e-skin with multiple stimuli perception and self-healing abilities not only enrich their bionic multifunctionality, but also greatly improve their sensory performance and functional stability. In this review, we highlight recent important developments in the material structure design strategy to imitate the fascinating functionalities of biological skins, including molecular synthesis, physical structure design, and special biomimicry engineering. Moreover, their specific structure-property relationships, multifunctional application, and existing challenges are also critically analyzed with representative examples. Furthermore, a summary and perspective on future directions and challenges of biomimetic electronic skins regarding function construction will be briefly discussed. We believe that this review will provide valuable guidance for readers to fabricate superior e-skin materials or devices with skin-like multifunctionalities and disparate characteristics.

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“…On an industrial scale, it turned out to be effective to use polymer matrices with conductive dispersed additives. Variations between the properties of elastomer matrices [ 6 ] and conductive disperse additives make it possible to form a wide range of materials with various properties [ 7 ]. The dynamic development of electric vehicles is accompanied by new types of tasks that affect the improvement of microclimate technologies [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Changes in the Electrophysical Parameters of Nanomodified Elastomers Caused by Electric Current’s Passage

Shchegolkov

Zemtsova

et al. 2023

Polymers

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The development of reliable and effective functional materials that can be used in various technological fields and environmental conditions is one of the goals of modern nanotechnology. Heating elements’ manufacturing requires understanding the laws of heat transfer under conditions of different supply voltages, as this expands the possibilities of such materials’ application. Elastomers based on silicon-organic compounds and polyurethane modified with multi-walled carbon nanotubes (MWCNTs) were studied at various concentrations of Ni/MgO or Co-Mo/MgO and voltages (220, 250, and 300 V). It was found that an increase in voltage from 220 to 300 V leads to an initial increase in specific power on one-third followed by a subsequent decrease in a specific power when switched on again to 220 V (for −40 °C) of up to ~44%. In turn, for a polyurethane matrix, an increase in voltage to 300 V leads to an initial peak power value of ~15% and a decrease in power when switched on again by 220 V (for −40 °C) to ~36% (Ni/MgO -MWCNT). The conducted studies have shown that the use of a polyurethane matrix reduces power degradation (associated with voltage surges above 220 V) by 2.59% for Ni/MgO–based MWCNT and by 10.42% for Co-Mo/MgO. This is due to the better heat resistance of polyurethane and the structural features of the polymer and the MWCNT. The current studies allow us to take the next step in the development of functional materials for electric heating and demonstrate the safety of using heaters at a higher voltage of up to 300 V, which does not lead to their ignition, but only causes changes in electrophysical parameters.

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Self-healing strain sensor based on silicone elastomer for human motion detection

Cited by 33 publications

References 47 publications

In Situ Polymerized MXene/Polypyrrole/Hydroxyethyl Cellulose-Based Flexible Strain Sensor Enabled by Machine Learning for Handwriting Recognition

In Situ Polymerized MXene/Polypyrrole/Hydroxyethyl Cellulose-Based Flexible Strain Sensor Enabled by Machine Learning for Handwriting Recognition

Recent Advances in Electronic Skins with Multiple-Stimuli-Responsive and Self-Healing Abilities

Changes in the Electrophysical Parameters of Nanomodified Elastomers Caused by Electric Current’s Passage

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