3D braided yarns to create electrochemical cells

Zhao, Chen; Farajikhah, Syamak; Wang, Caiyun; Foroughi, Javad; Jia, Xiaoteng; Wallace, Gordon G.

doi:10.1016/j.elecom.2015.09.021

Cited by 17 publications

(8 citation statements)

References 34 publications

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“…To accommodate braiding machines, a complex process was introduced at first. Polyester and nylon/stainless steel fibers were braided together ( Figure a) . Then the nylon fibers were removed using formic acid.…”

Section: Device Constructionmentioning

confidence: 99%

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A Route Toward Smart System Integration: From Fiber Design to Device Construction

et al. 2019

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Fiber is a symbol of human civilization, being ubiquitous but obscure in society over most of history. Fiber has been revived upon the advent of fiber‐based electronic devices in the past two decades. This is due to its desirable lightweight, flexible, and conformable characteristics, which enable it to play a fundamental role in the electronic and information era. Numerous fiber‐based electronic devices have sprung up in energy conversion, energy storage, sensing, actuation, etc. A possibility is thereby conceived that they can be integrated into smart systems compatible with the human body, consisting of biotic fiber‐based organs and tissues, which possess similar but more advanced functions. However, the design of mono‐/multifibers, the construction of fiber‐based devices, and the integration of these smart systems represent great challenges in fundamental understanding and practical implementation. A systematic review of the current state of the art with respect to the design and fabrication of electronic fiber materials, construction of fiber‐based devices, and integration of smart systems is presented. In addition, limitations of current fiber‐based devices and perspectives are explored toward potential and promising smart integration.

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Section: Device Constructionmentioning

confidence: 99%

“…a‐1) Polyester fiber and stainless steel (SS) wire bobbins, a‐2) braiding head, a‐3) as‐prepared braid structure, a‐4) braided supercapacitor. a) Reproduced with permission . Copyright 2015, Elsevier.…”

Section: Device Constructionmentioning

confidence: 99%

A Route Toward Smart System Integration: From Fiber Design to Device Construction

et al. 2019

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“…In recent decades there has been a significant focus upon the incorporation of electronic components into textiles and wearable garments for functionalities such as sensing, health, environment monitoring, and energy storage . Owing to the rapid development of nanoscience and technology, it is now possible to build electronic functions inside of, or on the surface of, fibers and consequently incorporate them into a garment structure using well‐established textile fabrication techniques .…”

Section: Specific Heat Capacities At 30 °C and Densities Of Pu And Bmentioning

confidence: 99%

Processable Thermally Conductive Polyurethane Composite Fibers

Farajikhah

Amber

Sayyar

et al. 2018

Macro Materials & Eng

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In recent decades there has been a significant focus upon the incorporation of electronic components into textiles and wearable garments for functionalities such as sensing, health, environment monitoring, and energy storage. [1][2][3][4][5][6][7] Owing to the rapid development of nanoscience and technology, it is now possible to build electronic functions inside of, or on the surface of, fibers and consequently incorporate them into a garment structure using well-established textile fabrication techniques. [1] As a result of the ever-increasing demand for wearable electronics, research has focused on the development of electrically conductive fibers for applications including strain sensing, energy storage, and electrical wiring. [8][9][10][11][12] Heat removal and heat management in microelectronics is now becoming important in light of the ever-growing demand for miniaturization and development of wearable electronics. [13] As a result, thermally conductive polymeric composite materials utilizing carbonous fillers such as reduced graphene oxide [14] or inorganic fillers such as boron nitride (BN) [15][16][17][18][19] have been investigated in a range of application including self-healing resins, electronic packaging, ultrahigh voltage electrical devices, and energy storage field. [14,[16][17][18][19][20] Alternatively, electrospun polyethylene fibers [21] and carbon fibers [22] have also been investigated as thermally conductive substrates.In this study, processable thermally conductive composite fibers have been produced utilizing a solvent-based polymerfiller solution mixing method from which fibers were produced via a wet-spinning (solvent/non-solvent) technique. [23] Non-cross-linked polyurethane (PU) was selected as it exhibits similar mechanical properties to that of rubber, whilst being thermally and solvent-processable. The combination of high elasticity along with high abrasion resistance makes PU very popular for a wide range of applications. [24] In addition, noncross-linked PU is readily soluble in organic solvents, from which composite structures with different fillers can be readily produced. [5,8,9,25] Boron nitride, also known as white graphite, is an isoelectronic with carbon and has a wide range of attractive properties such as high thermal conductivity, low coefficient of thermal expansion, high electrical resistivity over a wide temperature range, high temperature stability, high mechanical strength and hardness, and chemically and thermally stable Thermally Conductive FibersThe demand for wearable electronics has resulted in an increasing interest in the development of functional fibers, with a specific focus upon the development of electrically conductive fibers incorporable into garments. However, the production of thermally conductive fibers for heat dissipation has been largely neglected. Owing to the very rapid development of miniaturized wearable electronics, there is an increasing need for the development of thermally conductive fibers as heat sinks and thermal management processes....

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“…bioanalysis [8][9][10][11][12][13][14] , and embedded in a hydrogel as a network for chemotaxis studies 15 or multilayer feeding of cell cultures 16 . This capillary action subsequently drives the fluid along the thread, and it is directly related to the material hydrophilicity on the surface.…”

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confidence: 99%

Electrofluidic control of bioactive molecule delivery into soft tissue models based on gelatin methacryloyl hydrogels using threads and surgical sutures

Cabot

Daikuara

Yue

et al. 2020

Sci Rep

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The delivery of bioactive molecules (drugs) with control over spatial distribution remains a challenge. Herein, we demonstrate for the first time an electrofluidic approach to controlled delivery into soft tissue models based on gelatin methacryloyl (GelMA) hydrogels. This was achieved using a surgical suture, whereby transport of bioactive molecules, including drugs and proteins, was controlled by imposition of an electric field. Commonly employed surgical sutures or acrylic threads were integrated through the hydrogels to facilitate the directed introduction of bioactive species. The platform consisted of two reservoirs into which the ends of the thread were immersed. The anode and cathode were placed separately into each reservoir. The thread was taken from one reservoir to the other through the gel. When current was applied, biomolecules loaded onto the thread were directed into the gel. Under the same conditions, the rate of movement of the biomolecules along GelMA was dependent on the magnitude of the current. Using 5% GelMA and a current of 100 µA, 2 uL of fluorescein travelled through the hydrogel at a constant velocity of 7.17 ± 0.50 um/s and took less than 8 minutes to exit on the thread. Small molecules such as riboflavin migrated faster (5.99 ± 0.40 μm/s) than larger molecules such as dextran (2.26 ± 0.55 μm/s with 4 kDa) or BSA (0.33 ± 0.07 μm/s with 66.5 kDa). A number of commercial surgical sutures were tested and found to accommodate the controlled movement of biomolecules. Polyester, polyglactin 910, glycolide/lactide copolymer and polyglycolic acid braided sutures created adequate fluid connection between the electrodes and the hydrogel. With a view to application in skin inflammatory diseases and wound treatment, wound healing, slow and controlled delivery of dexamethasone 21-phosphate disodium salt (DSP), an anti-inflammatory prodrug, was achieved using medical surgicryl PGA absorbable suture. After 2 hours of electrical stimulation, still 81.1% of the drug loaded was encapsulated within the hydrogel.In 1912, Zorab 1 treated glaucoma by draining the anterior chamber to the subconjunctival space with a single silk thread 2,3 . Silk acted as a wick, removing fluid to reduce the intraocular pressure. After that, various types of drainage approaches were proposed, including the use of platinum 4 thread/wire, acrylic 5 , and polydimehylmethacrylate microtubules 6 , and even more complex methods attempting to control the pressure using pumps 7 . Thread and textiles have recently gained considerable attention as low-cost substrates for microfluidics and biosensor applications, based upon their mechanical strength and the ability to facilitate and direct fluid movement. Fluid flow in threads arise from wicking processes as a result of capillary forces generated within the gaps between directionally aligned fibres. Threads have been used in this way within a variety of applications, including

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3D braided yarns to create electrochemical cells

Cited by 17 publications

References 34 publications

A Route Toward Smart System Integration: From Fiber Design to Device Construction

A Route Toward Smart System Integration: From Fiber Design to Device Construction

Processable Thermally Conductive Polyurethane Composite Fibers

Electrofluidic control of bioactive molecule delivery into soft tissue models based on gelatin methacryloyl hydrogels using threads and surgical sutures

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