Sewing machine stitching of polyvinylidene fluoride fibers: programmable textile patterns for wearable triboelectric sensors

Shin, Young‐Eun; Lee, Jeong Eun; Park, Yoojeong; Hwang, Sang-Ha; Chae, Han Gi; Ko, Hyunhyub

doi:10.1039/c8ta08485h

Cited by 91 publications

(51 citation statements)

References 72 publications

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“…The conductive fabric, namely, the lower electrode of the C TOP , accumulates positive charges. [ 21 ] The quantity of charge is Q PVDF . Steady state 2 (Figure 3e) is the friction layers separated, and d is a larger value when external pressure is removed.…”

Section: Resultsmentioning

confidence: 99%

A Design of Flexible Triboelectric Generator Integrated with High‐Efficiency Energy Storage Unit

Zhang

et al. 2021

Energy Tech

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Herein, a design of flexible triboelectric generator integrated with high‐efficiency energy storage unit (FTEG‐ES) is proposed. The power generation unit is a flexible triboelectric generator (FTEG). Natural rubber and polyethylene terephthalate (PET) release film with silicone oil on the surface are used as the friction layer, and the polyvinylidene fluoride (PVDF) layer prepared by electrospinning is added compared with traditional structure to improve output performance. The flexible solid‐state capacitor made of chemical cross‐linked poly(vinyl alcohol)−H2SO4 hydrogel (CPH) and activated carbon is used as an energy storage unit. The test results prove that adding the PVDF layer effectively increases the output performance of FTEG. The open‐circuit voltage and short‐circuit current are increased by 19% and 47%, respectively. The short‐circuit current density and maximum output power are up to 1.30 μA cm−2 and 100 μW cm−2, respectively. The flexible solid‐state capacitor can store energy more efficiently than electrolytic capacitors. The charging speed of the flexible solid‐state capacitor is increased by 34.4% compared with electrolytic capacitors when charge the 1 mF capacitor to 1.5 V. Finally, the experiments show that FTEG‐ES can be used as a backup power source for low‐power devices. The feasibility of triboelectric generator applications is explored by this work.

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Section: Resultsmentioning

confidence: 99%

A Design of Flexible Triboelectric Generator Integrated with High‐Efficiency Energy Storage Unit

Zhang

et al. 2021

Energy Tech

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“…There is also a wide selection of available natural and synthetic threads that can be functionalized to incorporate electronics for the development of electronic biosensors. 44,45 There are two principal textile manufacturing methods for the integration of these functions: the first is additive fabrication such as printing on textiles or embroidering threads into textiles to add function (Figure 4a-b) 45,46 and the second is a bottom-up approach where all base functions are embedded at the fiber level, and weaving or knitting is used to design and create the µTAS (Figure 4c). 47 Although both of these fabrication approaches offer low cost and robust wearable biosensors without the need for undergoing complicated microfabrication processes at cleanrooms, the first approaches, including screen-printing 48 and embroidery techniques, 46,49 are widely used due to their potential of scalability, and therefore, are amenable to industrial applicability.…”

Section: Total Analysis Systemsmentioning

confidence: 99%

Thread-based wearable devices

et al. 2021

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One-dimensional substrates such as textile fibers and threads offer an excellent opportunity to realize sensors, actuators, energy harvesters/storage, microfluidics, and advanced therapies. A new generation of wearable devices made from smart threads offer ultimate flexibility and seamless integration with the human body and the garments that adorn them. This article reviews the state of the art in thread-based wearable devices for monitoring human activity and performance, diagnoses and manages medical conditions, and provides new and improved human–machine interfaces. In the area of new and improved human–machine interfaces, it discusses novel computing platforms enabled using thread-based electronics and batteries/capacitors. For physical activity monitoring, a review of wearable devices using strain sensing threads is provided. Thread-based devices that can monitor health from biological fluids such as total analysis systems, wearable sweat sensing patches, and smart sutures/smart bandages are also included. The article concludes with an outlook on how fibers and threads are expected to impact and revolutionize the next generation of wearable devices. Knowledge gaps and emerging opportunities are presented. Graphic Abstract

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“…In fact, many macroscale printing sensing sheets have been proposed, suggesting that a variety of methods show potential for the concept . In particular, textile‐based flexible sensors have been reported previously to demonstrate macroscale and different functionalities such as strain detection . However, a technology from materials to practical products has yet to be developed because it must consider the reliability, lifetime, macroscalability, and affordability depending on the specific applications.…”

Section: Introductionmentioning

confidence: 99%

Textile‐Based Flexible Tactile Force Sensor Sheet

Honda

Zhu²,

Satoh³

et al. 2019

Adv Funct Materials

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The next generation of electronics will include human-interactive flexible sensor sheets to monitor health. One approach is to realize practical macroscale low-cost sensor arrays to monitor pressure distribution and health conditions without directly attaching a device onto the body. However, practical requirements such as reliability, scalability, and washability are not often discussed as most studies focus on the sensing sensitivity and validations. This study demonstrates an all textile-based tactile force sensor sheet that covers the above requirements. By considering the device design and materials, high reliability/repeatability (≈250 000 cycles at ≈5 kPa) and washability are realized. These are important factors for practical applications for human-interactive macroscale sensor sheets. In addition to the fundamental characteristics, pressure distribution mapping and respiration rate monitoring are confirmed by placing the sensor sheets on a bed, chair, and floor.

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Sewing machine stitching of polyvinylidene fluoride fibers: programmable textile patterns for wearable triboelectric sensors

Abstract: Textile-based sensors can perceive and respond to environmental stimuli in daily life, and hence are critical components of wearable devices.

Cited by 91 publications

References 72 publications

A Design of Flexible Triboelectric Generator Integrated with High‐Efficiency Energy Storage Unit

A Design of Flexible Triboelectric Generator Integrated with High‐Efficiency Energy Storage Unit

Thread-based wearable devices

Textile‐Based Flexible Tactile Force Sensor Sheet

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