Highly Stretchable Sheath–Core Yarns for Multifunctional Wearable Electronics

2020 ◽  
Author(s):  
Guangming Cai ◽  
Baowei Hao ◽  
Lei Luo ◽  
Zhongming Deng ◽  
Ruquan Zhang ◽  
...  
Keyword(s):  
Wearable Electronics ◽  
Highly Stretchable

scholarly journals Stretchable, Rehealable, Recyclable, and Reconfigurable Integrated Strain Sensor for Joint Motion and Respiration Monitoring

Research ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Chuanqian Shi ◽  
Zhanan Zou ◽  
Zepeng Lei ◽  
Pengcheng Zhu ◽  
Guohua Nie ◽  
...  
Keyword(s):  
Stretchable Electronics ◽  
Joint Motion ◽  
Wearable Electronics ◽  
Strain Sensing ◽  
Eutectic Liquid ◽  
Respiration Monitoring ◽  
Sensing System ◽  
Liquid Metal Alloy ◽  
Highly Stretchable ◽  
Different Parts

Cutting-edge technologies of stretchable, skin-mountable, and wearable electronics have attracted tremendous attention recently due to their very wide applications and promising performances. One direction of particular interest is to investigate novel properties in stretchable electronics by exploring multifunctional materials. Here, we report an integrated strain sensing system that is highly stretchable, rehealable, fully recyclable, and reconfigurable. This system consists of dynamic covalent thermoset polyimine as the moldable substrate and encapsulation, eutectic liquid metal alloy as the strain sensing unit and interconnects, and off-the-shelf chip components for measuring and magnifying functions. The device can be attached on different parts of the human body for accurately monitoring joint motion and respiration. Such a strain sensing system provides a reliable, economical, and ecofriendly solution to wearable technologies, with wide applications in health care, prosthetics, robotics, and biomedical devices.

A multifunctional and highly stretchable electronic device based on silver nanowire/wrap yarn composite for a wearable strain sensor and heater

2019 ◽  
Vol 7 (43) ◽  
pp. 13468-13476 ◽  
Author(s):  
Min Zhao ◽  
Dawei Li ◽  
Jieyu Huang ◽  
Di Wang ◽  
Alfred Mensah ◽  
...  
Keyword(s):  
Electronic Device ◽  
Strain Sensor ◽  
Human Motion ◽  
Silver Nanowire ◽  
Thermal Therapy ◽  
Wearable Electronics ◽  
Human Motion Detection ◽  
Healthcare Monitoring ◽  
Highly Stretchable ◽  
Yarn Composite

Stretchable and wearable electronics, as a well-researched engineering frontier, can be applied in human motion detection, thermal therapy, personal healthcare monitoring and smart human–machine interactions.

scholarly journals Highly Stretchable, Elastic, and Sensitive MXene-Based Hydrogel for Flexible Strain and Pressure Sensors

Research ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-13 ◽  
Author(s):  
Yao Lu ◽  
Xinyu Qu ◽  
Wen Zhao ◽  
Yanfang Ren ◽  
Weili Si ◽  
...  
Keyword(s):  
Limit Of Detection ◽  
Full Range ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Strain Sensors ◽  
Poly Vinyl Alcohol ◽  
Wearable Electronics ◽  
Double Network ◽  
Hydrogel Matrix ◽  
Highly Stretchable

Electronic skin is driving the next generation of cutting-edge wearable electronic products due to its good wearability and high accuracy of information acquisition. However, it remains a challenge to fulfill the requirements on detecting full-range human activities with existing flexible strain sensors. Herein, highly stretchable, sensitive, and multifunctional flexible strain sensors based on MXene- (Ti3C2Tx-) composited poly(vinyl alcohol)/polyvinyl pyrrolidone double-network hydrogels were prepared. The uniformly distributed hydrophilic MXene nanosheets formed a three-dimensional conductive network throughout the hydrogel, endowing the flexible sensor with high sensitivity. The strong interaction between the double-network hydrogel matrix and MXene greatly improved the mechanical properties of the hydrogels. The resulting nanocomposited hydrogels featured great tensile performance (2400%), toughness, and resilience. Particularly, the as-prepared flexible pressure sensor revealed ultrahigh sensitivity (10.75 kPa-1) with a wide response range (0-61.5 kPa), fast response (33.5 ms), and low limit of detection (0.87 Pa). Moreover, the hydrogel-based flexible sensors, with high sensitivity and durability, could be employed to monitor full-range human motions and assembled into some aligned devices for subtle pressure detection, providing enormous potential in facial expression and phonation recognition, handwriting verification, healthy diagnosis, and wearable electronics.

A Highly Stretchable Transparent Self-Powered Triboelectric Tactile Sensor with Metallized Nanofibers for Wearable Electronics

2018 ◽  
Vol 30 (12) ◽  
pp. 1706738 ◽  
Author(s):  
Xiandi Wang ◽  
Yufei Zhang ◽  
Xiaojia Zhang ◽  
Zhihao Huo ◽  
Xiaoyi Li ◽  
...  
Keyword(s):  
Tactile Sensor ◽  
Wearable Electronics ◽  
Highly Stretchable ◽  
Self Powered

The development of a highly stretchable, durable, and printable textile electrode

2019 ◽  
Vol 89 (19-20) ◽  
pp. 4104-4113 ◽  
Author(s):  
Won Jae Lee ◽  
Jin Yeong Park ◽  
Hyun Jin Nam ◽  
Sung-Hoon Choa
Keyword(s):  
Interface Layer ◽  
Wearable Electronics ◽  
Massachusetts Institute Of Technology ◽  
Textile Electrodes ◽  
Textile Electrode ◽  
Endurance Tests ◽  
Highly Stretchable ◽  
Finger Motion ◽  
Institute Of Technology ◽  
Dynamic Endurance

In textile and wearable electronics, the demand for a stretchable, durable, and easily manufacturable electrode is ever increasing. This paper describes the development of a highly stretchable and durable textile electrode fabricated by simple stencil and screen printing methods. It specifically investigated the effects of an interface layer as a planarization layer between the conductive electrode and the textile on the durability of the textile electrode. A stretchable conductive paste was synthesized by mixing Ag flake powder in polyester. The conductive electrode was encapsulated with Ecoflex material. The stretchability and durability of the textile electrodes were evaluated via stretching, bending, Massachusetts Institute of Technology (MIT) folding, twisting, and dynamic endurance tests. The stretching and MIT folding tests indicated that the interface layer significantly enhanced the durability of the textile electrode. A highly stretchable and flexible textile electrode exhibited a low sheet resistance of 0.05 Ω/square, excellent stretchability of 70%, and a critical bending radius of 1.5 mm. The textile electrodes also withstood dynamic stretching and bending endurance tests of 10,000 cycles. The illumination of a light-emitting diode with the conductive electrode was also stable under 70% tensile strain and in water. The potential application of the textile electrode as a strain sensor was demonstrated by applying it to a glove to detect finger motion. The strain sensors responded well to the finger motion, with considerable stability and repeatability.

scholarly journals Quasi-solid-state highly stretchable circular knitted MnO2@CNT supercapacitor

RSC Advances ◽  
2020 ◽  
Vol 10 (24) ◽  
pp. 14007-14012 ◽  
Author(s):  
Taegyu Park ◽  
Yongwoo Jang ◽  
Jong Woo Park ◽  
Hyunsoo Kim ◽  
Seon Jeong Kim
Keyword(s):  
Solid State ◽  
High Performance ◽  
Mechanical Stability ◽  
Wearable Electronics ◽  
Highly Stretchable

Flexible and stretchable double-walled circular knitted MnO2@CNT supercapacitors shows high performance, electrochemical and mechanical stability and can be used for wearable electronics.

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.

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