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.

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

2018 ◽  
Vol 10 (24) ◽  
pp. 20897-20909 ◽  
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

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.

Highly Stretchable and Wearable Graphene Strain Sensors with Controllable Sensitivity for Human Motion Monitoring

2015 ◽  
Vol 7 (11) ◽  
pp. 6317-6324 ◽  
Author(s):  
Jung Jin Park ◽  
Woo Jin Hyun ◽  
Sung Cik Mun ◽  
Yong Tae Park ◽  
O Ok Park
Keyword(s):  
Human Motion ◽  
Strain Sensors ◽  
Highly Stretchable ◽  
Human Motion Monitoring

scholarly journals Highly Stretchable and Kirigami-Structured Strain Sensors with Long Silver Nanowires of High Aspect Ratio

Machines ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 186
Author(s):  
Huiyan Huang ◽  
Catherine Jiayi Cai ◽  
Bok Seng Yeow ◽  
Jianyong Ouyang ◽  
Hongliang Ren
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Silver Nanowires ◽  
Human Motion ◽  
Strain Sensors ◽  
One Pot ◽  
Human Motion Detection ◽  
Synthesis Parameters ◽  
Highly Stretchable ◽  
Modified Polyol Method

Stretchable, skin-interfaced, and wearable strain sensors have risen in recent years due to their wide-ranging potential applications in health-monitoring devices, human motion detection, and soft robots. High aspect ratio (AR) silver nanowires (AgNWs) have shown great potential in the flexible and stretchable strain sensors due to the high conductivity and flexibility of AgNW conductive networks. Hence, this work aims to fabricate highly stretchable, sensitive, and linear kirigami strain sensors with high AR AgNWs. The AgNW synthesis parameters and process windows have been identified by Taguchi’s design of experiment and analysis. Long AgNWs with a high AR of 1556 have been grown at optimized synthesis parameters using the one-pot modified polyol method. Kirigami sensors were fabricated via full encapsulation of AgNWs with Ecoflex silicon rubber. Kirigami-patterned strain sensors with long AgNWs show high stretchability, moderate sensitivity, excellent linearity (R2 = 0.99) up to 70% strain and can promptly detect finger movement without obvious hysteresis.

scholarly journals Non-Monotonic Sensor Behavior of Carbon Particle-Filled Textile Strain Sensors

2021 ◽  
Vol 6 (1) ◽  
pp. 13
Author(s):  
Johannes Mersch ◽  
Henriette Probst ◽  
Andreas Nocke ◽  
Chokri Cherif ◽  
Gerald Gerlach
Keyword(s):  
Thermoplastic Polyurethane ◽  
Carbon Particle ◽  
Equivalent Circuit Model ◽  
Conductive Filler ◽  
Underlying Mechanism ◽  
Human Motion ◽  
Strain Sensors ◽  
Material Behavior ◽  
Strain History ◽  
Filled Elastomers

Carbon particle-filled elastomers are a widely researched option to be used as piezoresistive strain sensors for soft robotics or human motion monitoring. Therefore, various polymers can be compounded with carbon black (CB), carbon nanotubes (CNT) or graphene. However, in many studies, the electrical resistance strain response of the carbon particle-filled elastomers is non-monotonic in dynamic evaluation scenarios. The non-monotonic material behavior is also called shoulder phenomenon or secondary peak. Until today, the underlying cause is not sufficiently well understood. In this study, several influencing test parameters on the shoulder phenomena are explored, such as strain level, strain rate and strain history. Moreover, material parameters such as CNT content and anisotropy are varied in melt-spun CNT filled thermoplastic polyurethane (TPU) filament yarns, and their non-monotonic sensor response is evaluated. Additionally, a theoretical concept for the underlying mechanism and thereupon-based model is presented. An equivalent circuit model is used, which incorporates the visco-elastic properties and the characteristic of the percolation network formed by the conductive filler material. The simulation results are in good agreement when compared to the experimental results.

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 flexible and transparent dielectric elastomer actuators using silver nanowire and carbon nanotube hybrid electrodes

Soft Matter ◽  
2017 ◽  
Vol 13 (37) ◽  
pp. 6390-6395 ◽  
Author(s):  
Ye Rim Lee ◽  
Hyungho Kwon ◽  
Do Hoon Lee ◽  
Byung Yang Lee
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Silver Nanowires ◽  
Dielectric Elastomer ◽  
Silver Nanowire ◽  
Dielectric Elastomer Actuator ◽  
Dielectric Elastomer Actuators ◽  
Transparent Dielectric ◽  
Optically Transparent ◽  
Highly Stretchable

Electrodes consisting of silver nanowires and carbon nanotubes enable a dielectric elastomer actuator to become highly stretchable and optically transparent.

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

Ultrastretchable and Stable Strain Sensors Based on Antifreezing and Self-Healing Ionic Organohydrogels for Human Motion Monitoring

2019 ◽  
Vol 11 (9) ◽  
pp. 9405-9414 ◽  
Author(s):  
Jin Wu ◽  
Zixuan Wu ◽  
Xing Lu ◽  
Songjia Han ◽  
Bo-Ru Yang ◽  
...  
Keyword(s):  
Human Motion ◽  
Strain Sensors ◽  
Self Healing ◽  
Human Motion Monitoring
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