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

2018 ◽  
Vol 168 ◽  
pp. 126-132 ◽  
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

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

Nanomaterials ◽  
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.

A highly stretchable strain sensor based on electrospun carbon nanofibers for human motion monitoring

RSC Advances ◽  
2016 ◽  
Vol 6 (82) ◽  
pp. 79114-79120 ◽  
Author(s):  
Yichun Ding ◽  
Jack Yang ◽  
Charles R. Tolle ◽  
Zhengtao Zhu
Keyword(s):  
Carbon Nanofibers ◽  
Strain Sensor ◽  
Human Motion ◽  
Sensitive Strain ◽  
Free Standing ◽  
Highly Stretchable ◽  
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%.

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

2017 ◽  
Vol 9 (2) ◽  
pp. 1770-1780 ◽  
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

A highly stretchable and transparent silver nanowire/thermoplastic polyurethane film strain sensor for human motion monitoring

2019 ◽  
Vol 6 (11) ◽  
pp. 3119-3124 ◽  
Author(s):  
Runfei Wang ◽  
Wei Xu ◽  
Wenfeng Shen ◽  
Xiaoqing Shi ◽  
Jian Huang ◽  
...  
Keyword(s):  
Silver Nanowires ◽  
Thermoplastic Polyurethane ◽  
Human Motion ◽  
Strain Sensors ◽  
Silver Nanowire ◽  
Transparent Film ◽  
Polyurethane Film ◽  
Highly Stretchable ◽  
Human Motion Monitoring ◽  
Human Motions

Transparent film strain sensors based on silver nanowires and thermoplastic polyurethane are promising candidates for detecting various human motions and monitoring the mass of some kinetic objects.

scholarly journals Stretchable Strain Sensor with Controllable Negative Resistance Sensitivity Coefficient Based on Patterned Carbon Nanotubes/Silicone Rubber Composites

Micromachines ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 716
Author(s):  
Rong Dong ◽  
Jianbing Xie
Keyword(s):  
Carbon Nanotubes ◽  
Silica Gel ◽  
Strain Sensor ◽  
Sensitivity Coefficient ◽  
Negative Resistance ◽  
Human Motion ◽  
Strain Sensors ◽  
Application Range ◽  
Human Motion Monitoring ◽  
Soft Elastomer

In this paper, stretchable strain sensors with a controllable negative resistance sensitivity coefficient are firstly proposed. In order to realize the sensor with a negative resistance sensitivity coefficient, a stretchable stress sensor with sandwich structure is designed in this paper. Carbon nanotubes are added between two layers of silica gel. When the sensor is stretched, carbon nanotubes will be squeezed at the same time, so the sensor will show a resistance sensitivity coefficient that the resistance becomes smaller after stretching. First, nanomaterials are coated on soft elastomer, then a layer of silica gel is wrapped on the outside of the nanomaterials. In this way, similar to sandwich biscuits, a stretchable strain sensor with controllable negative resistance sensitivity coefficient has been obtained. Because the carbon nanotubes are wrapped between two layers of silica gel, when the silica gel is stretched, the carbon nanotubes will be squeezed longitudinally, which increases their density and resistance. Thus, a stretchable strain sensor with negative resistance sensitivity coefficient can be realized, and the resistivity can be controlled and adjusted from 12.7 Ω·m to 403.2 Ω·m. The sensor can be used for various tensile testing such as human motion monitoring, which can effectively expand the application range of conventional tensile strain sensor.

A photonic sintering derived Ag flake/nanoparticle-based highly sensitive stretchable strain sensor for human motion monitoring

Nanoscale ◽  
2018 ◽  
Vol 10 (17) ◽  
pp. 7890-7897 ◽  
Author(s):  
Inhyuk Kim ◽  
Kyoohee Woo ◽  
Zhaoyang Zhong ◽  
Pyungsam Ko ◽  
Yunseok Jang ◽  
...  
Keyword(s):  
Strain Sensor ◽  
Human Motion ◽  
Intense Pulsed Light ◽  
Sintering Process ◽  
Pulsed Light ◽  
Highly Sensitive ◽  
Highly Stretchable ◽  
Human Motion Monitoring ◽  
Photonic Sintering

A highly stretchable sensor with excellent sensitivity was obtained using an Ag flake/Ag NC hybrid by an intense pulsed light sintering process.

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