Stretchable, Transparent, and Self‐Patterned Hydrogel‐Based Pressure Sensor for Human Motions Detection

Ge, Gang; Zhang, Yizhou; Shao, Jinjun; Wang, Wenjun; Si, Weili; Huang, Wei; Dong, Xiaochen

doi:10.1002/adfm.201802576

Cited by 473 publications

(331 citation statements)

References 51 publications

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“…Inset: enlarged view in subtle‐pressure regime. (b) Sensitivity of our NMTP‐based sensor in comparison with previously reported resistive pressure sensors . (c) The reproducibility test of NMTP‐based pressure sensor at different pressure ranges.…”

Section: Resultsmentioning

confidence: 99%

Highly sensitive pressure sensor based on structurally modified tissue paper for human physiological activity monitoring

Huang

Wang

Zhou

et al. 2020

J of Applied Polymer Sci

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Pressure sensor has become an important part of physiological condition monitoring system because it can respond to small pressure in human activities. Tissue paper has been studied as a carrier of sensitive unit layer for pressure sensors in recent years due to its internal pore structure and wrinkle morphology of surface. In this work, the pore structure of the tissue paper is improved by the principle of hydration and destruction of hydrogen bonds. Based on flexible substrate of NaOH modified tissue paper (NMTP) with enhanced pore structure, combined with dip-coating composite conductive filler, the pressure sensor is fabricated by sandwiching the sensitive unit between the interdigital electrode and the microdome elastomer through layer-by-layer assembly method. Thanks to the excellent interfacial resistance effect of porous NMTP under pressure, the sensitivity of NMTP-based pressure sensor is as high as 37.5 kPa −1 in a pressure range of 0-2 kPa. Finally, the follow-up studies on pressure sensors have been proven to be applicable to a variety of physiological activity such as pulse detection, respiration detection and voice recognition. The NMTP-based sensitive unit provides alternative strategy to improve performance of pressure sensors and extends potential applications in monitoring human physiological activities.

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Section: Resultsmentioning

confidence: 99%

Highly sensitive pressure sensor based on structurally modified tissue paper for human physiological activity monitoring

Huang

Wang

Zhou

et al. 2020

J of Applied Polymer Sci

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“…Other subtle physiological signals (e.g., pronouncing, coughing, swallowing, etc.) [1,2,4,6,16,24,26,[31][32][33] www.advelectronicmat.de static press with different intensity and dynamic vibration could be detected in real-time. Besides, our pressure sensors can be used to "feel" human touch.…”

Section: Various Human Activities Monitoring and Spatial Pressure Mapmentioning

confidence: 99%

Large‐Area Fabrication of High‐Performance Flexible and Wearable Pressure Sensors

Khan

Ting

et al. 2020

Adv Elect Materials

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Flexible pressure sensors with high sensitivity, broad working range, and good scalability are highly desired for the next generation of wearable electronic devices. However, manufacturing of such pressure sensors still remains challenging. A large‐area compliant and cost‐effective process to fabricate high‐performance pressure sensors via a combination of mesh‐molded periodic microstructures and printed side‐by‐side electrodes is presented. The sensors exhibit low operating voltage (1 V), high sensitivity (20.9 kPa−1), low detection limit (7.4 Pa), fast response/recovery time (23/18 ms), and excellent reliability (over 10 000 cycles). More importantly, they exhibit ultra‐broad working range (7.4–1 000 000 Pa), high tunability, large‐scale production feasibility, and significant advantage in format miniaturization and creating sensor arrays with self‐defined patterns. The versatility of these devices is demonstrated in various human activity monitoring and spatial pressure mapping as electronic skins. Furthermore, utilizing printing methods, a flexible smart insole with a high level of integration for both foot pressure and temperature mapping is demonstrated. The scalable and cost‐effective manufacturing along with the good comprehensive performance of the pressure sensors makes them very attractive for future development of wearable smart devices and human–machine interfaces.

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“…Polymer hydrogels, with special three-dimensional network structure and soft-wet properties [1][2][3][4][5], show great prospects in numerous attractive fields such as water treatment, sensors, biomedical science, soft robots [6][7][8][9][10][11][12][13][14]. However, traditional polymer hydrogels always suffer from weak strength and unable to self-heal spontaneously, which are extremely important for practical applications [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of mechanical property and absorption capability of hydrophobically associated polyacrylamide hydrogels by adding cellulose nanofiber

Zhang

Zhao

et al. 2020

Mater. Res. Express

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Hydrophobically associated (HA) hydrogels have attracted great concerns with their admirable properties, such as self-healing and shape memory. However, a few works have been devoted to apply HA hydrogels in practice, especially in wastewater treatment. This may be because of the non-ionic monomer composition and the poor mechanical properties after swelling. In this work, in order to improve the mechanical properties and absorption behavior of HA polyacrylamide (HPAM) hydrogel, hydrophobically associated polyacrylamide/cellulose nanofiber (HPAMF) composite hydrogels were prepared. It was found that by incorporating CNF (2 wt%), the tensile strength (≈0.276 MPa) was largely increased by 632% compared to HPAM hydrogels. The maximum Cu ion adsorption capacity of the HPAMF hydrogel (containing 2 wt% CNF) was 2.33 mmol g −1 , about 86% over the HPAM hydrogel. The HPAMF hydrogels with self-healing, excellent mechanical and adsorption properties can be promisingly served as reliable absorbents, consequently satisfying the needs of practical application of heavy metal treatment.

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Stretchable, Transparent, and Self‐Patterned Hydrogel‐Based Pressure Sensor for Human Motions Detection

Cited by 473 publications

References 51 publications

Highly sensitive pressure sensor based on structurally modified tissue paper for human physiological activity monitoring

Highly sensitive pressure sensor based on structurally modified tissue paper for human physiological activity monitoring

Large‐Area Fabrication of High‐Performance Flexible and Wearable Pressure Sensors

Enhancement of mechanical property and absorption capability of hydrophobically associated polyacrylamide hydrogels by adding cellulose nanofiber

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