Highly Stretchable and Self-Healing Strain Sensor Based on Gellan Gum Hybrid Hydrogel for Human Motion Monitoring

A highly stretchable and sensitive strain sensor assembled by embedding a free-standing electrospun carbon nanofibers (CNFs) mat in a polyurethane (PU) matrix shows a fast, stable, and reproducible response to strain up to 300%.

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Highly Stretchable, Hysteresis-Free Ionic Liquid-Based Strain Sensor for Precise Human Motion Monitoring

ACS Applied Materials & Interfaces ◽

10.1021/acsami.6b12415 ◽

2017 ◽

Vol 9 (2) ◽

pp. 1770-1780 ◽

Cited By ~ 155

Author(s):

Dong Yun Choi ◽

Min Hyeong Kim ◽

Yong Suk Oh ◽

Soo-Ho Jung ◽

Jae Hee Jung ◽

...

Keyword(s):

Ionic Liquid ◽

Strain Sensor ◽

Human Motion ◽

Highly Stretchable ◽

Human Motion Monitoring

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A highly stretchable carbon nanotubes/thermoplastic polyurethane fiber-shaped strain sensor with porous structure for human motion monitoring

Composites Science and Technology ◽

10.1016/j.compscitech.2018.09.006 ◽

2018 ◽

Vol 168 ◽

pp. 126-132 ◽

Cited By ~ 34

Author(s):

Xiaozheng Wang ◽

Hongling Sun ◽

Xiaoyan Yue ◽

Yunfei Yu ◽

Guoqiang Zheng ◽

...

Keyword(s):

Carbon Nanotubes ◽

Porous Structure ◽

Thermoplastic Polyurethane ◽

Strain Sensor ◽

Human Motion ◽

Highly Stretchable ◽

Human Motion Monitoring

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Highly Stretchable and Biocompatible Strain Sensors Based on Mussel-Inspired Super-Adhesive Self-Healing Hydrogels for Human Motion Monitoring

ACS Applied Materials & Interfaces ◽

10.1021/acsami.8b06475 ◽

2018 ◽

Vol 10 (24) ◽

pp. 20897-20909 ◽

Cited By ~ 146

Author(s):

Xin Jing ◽

Hao-Yang Mi ◽

Yu-Jyun Lin ◽

Eduardo Enriquez ◽

Xiang-Fang Peng ◽

...

Keyword(s):

Human Motion ◽

Strain Sensors ◽

Self Healing ◽

Highly Stretchable ◽

Human Motion Monitoring

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Stretchable Strain Sensor for Human Motion Monitoring Based on an Intertwined-Coil Configuration

Nanomaterials ◽

10.3390/nano10101980 ◽

2020 ◽

Vol 10 (10) ◽

pp. 1980

Author(s):

Wei Pan ◽

Wei Xia ◽

Feng-Shuo Jiang ◽

Xiao-Xiong Wang ◽

Zhi-Guang Zhang ◽

...

Keyword(s):

Thermoplastic Polyurethane ◽

Strain Sensor ◽

Dip Coating ◽

Human Motion ◽

Wearable Electronics ◽

Special Configuration ◽

Highly Stretchable ◽

Application Potential ◽

Promising Application ◽

Human Motion Monitoring

Wearable electronics, such as sensors, actuators, and supercapacitors, have attracted broad interest owing to their promising applications. Nevertheless, practical problems involving their sensitivity and stretchability remain as challenges. In this work, efforts were devoted to fabricating a highly stretchable and sensitive strain sensor based on dip-coating of graphene onto an electrospun thermoplastic polyurethane (TPU) nanofibrous membrane, followed by spinning of the TPU/graphene nanomembrane into an intertwined-coil configuration. Owing to the intertwined-coil configuration and the synergy of the two structures (nanoscale fiber gap and microscale twisting of the fiber gap), the conductive strain sensor showed a stretchability of 1100%. The self-inter-locking of the sensor prevents the coils from uncoiling. Thanks to the intertwined-coil configuration, most of the fibers were wrapped into the coils in the configuration, thus avoiding the falling off of graphene. This special configuration also endowed our strain sensor with an ability of recovery under a strain of 400%, which is higher than the stretching limit of knees and elbows in human motion. The strain sensor detected not only subtle movements (such as perceiving a pulse and identifying spoken words), but also large movements (such as recognizing the motion of fingers, wrists, knees, etc.), showing promising application potential to perform as flexible strain sensors.

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