Flexible, durable, and washable triboelectric yarn and embroidery for self-powered sensing and human-machine interaction

Chen, Yu; Chen, Erdong; Wang, Zihao; Ling, Yali; Fisher, Rosie; Li, Mengjiao; Hart, Jacob; Mu, Weilei; Gao, Wei; Tao, Xiaoming; Yang, Bao; Yin, Rong

doi:10.1016/j.nanoen.2022.107929

Cited by 43 publications

(23 citation statements)

References 51 publications

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“…With the emerging of metaverse, human-machine interaction (HMI) attracts more and more attentions as the indispensable element in metaverse, even robotics, VR/ AR and human-machine systems [1][2][3][4]. Current research on bio-organic interfaces has contributed significantly to the realization of HMI [5,6].…”

Section: Introductionmentioning

confidence: 99%

Skin-Inspired Ultra-Tough Supramolecular Multifunctional Hydrogel Electronic Skin for Human–Machine Interaction

Chen

Liang

et al. 2023

Nano-Micro Lett.

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Multifunctional supramolecular ultra-tough bionic e-skin with unique durability for human–machine interaction in complex scenarios still remains challenging. Herein, we develop a skin-inspired ultra-tough e-skin with tunable mechanical properties by a physical cross-linking salting-freezing-thawing method. The gelling agent (β-Glycerophosphate sodium: Gp) induces the aggregation and binding of PVA molecular chains and thereby toughens them (stress up to 5.79 MPa, toughness up to 13.96 MJ m−3). Notably, due to molecular self-assembly, hydrogels can be fully recycled and reprocessed by direct heating (100 °C for a few seconds), and the tensile strength can still be maintained at about 100% after six recoveries. The hydrogel integrates transparency (> 60%), super toughness (up to 13.96 MJ m−3, bearing 1500 times of its own tensile weight), good antibacterial properties (E. coli and S. aureus), UV protection (Filtration: 80%–90%), high electrical conductivity (4.72 S m−1), anti-swelling and recyclability. The hydrogel can not only monitor daily physiological activities, but also be used for complex activities underwater and message encryption/decryption. We also used it to create a complete finger joint rehabilitation system with an interactive interface that dynamically presents the user’s health status. Our multifunctional electronic skin will have a profound impact on the future of new rehabilitation medical, human–machine interaction, VR/AR and the metaverse fields.

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Section: Introductionmentioning

confidence: 99%

Skin-Inspired Ultra-Tough Supramolecular Multifunctional Hydrogel Electronic Skin for Human–Machine Interaction

Chen

Liang

et al. 2023

Nano-Micro Lett.

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“…In recent years, there has been a growing interest in wearable electronic devices, which are increasingly used in the fields of the Internet of Things, artificial intelligence, robotic haptics, and smart elderly care systems. − Usually, electronic device systems are mostly made of rigid synthetic polymer materials, which are not suitable for wearable devices. − There is a great need to develop the next generation of flexible wearable electronic devices that are soft, stretchable to accommodate body movements and preferably self-powered to avoid the use of bulky batteries and cumbersome charging steps. − Conductive gel polymers, including ionic liquid (IL) gel, ionic hydrogel, and organic hydrogel, are chemically or physically cross-linked three-dimensional polymer networks containing conductive materials and free-moving ions. − With tunable mechanical properties and conductivity, these soft gels have been extensively investigated to develop soft and stretchable triboelectric nanogenerator (TENG)-based self-powered sensors and integrate them into wearable human–machine interaction (HMI) devices. , …”

Section: Introductionmentioning

confidence: 99%

Transparent, Stretchable, and Adhesive Conductive Ionic Hydrogel-Based Self-Powered Sensors for Smart Elderly Care Systems

Yang

Tian

Hua

2023

ACS Appl. Mater. Interfaces

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Nowadays, with the intensification of the aging society, the demand for elderly care and medical services is increasing and the elderly care and health systems are facing serious challenges. Therefore, it is imperative to develop a smart elderly care system to achieve real-time interaction between the elderly, the community, and medical personnel and to improve the efficiency of caring for the elderly. Here, we prepared ionic hydrogels with stable properties of high mechanical strength, high electrical conductivity, and high transparency by the one-step immersion method and used them in self-powered sensors for smart elderly care systems. The complexation of Cu2+ ions with polyacrylamide (PAAm) endows ionic hydrogels with excellent mechanical properties and electrical conductivity. Meanwhile, potassium sodium tartrate prevents the generated complex ions from precipitating into precipitates, thus ensuring the transparency of the ionic conductive hydrogel. After optimization, the transparency, tensile strength, elongation at break, and conductivity of the ionic hydrogel reached 94.1% at 445 nm, 192 kPa, 1130%, and 6.25 S/m, respectively. By processing and coding the collected triboelectric signals, a self-powered human–machine interaction system attached to the finger of the elderly was developed. The elderly can complete the transmission of distress and basic needs by simply bending their fingers, greatly reducing the pressure of inadequate medical care in an aging society. This work demonstrates the value of self-powered sensors in the field of smart elderly care systems, showing a wide implication in human–computer interface.

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“…[13,14] Since mechanical motion is one of the most common activities in human bodies, the electromechanical sensors which convert the mechanical signal into an electrical signal are in great demand. 1D threadlike electromechanical sensors include functional fibers [5,11,15,16] and piezoelectric wire/cable sensors. [17][18][19] The adopted mechanisms in them involve piezoresistance, [20,21] capacitance, [7,22,23] piezoelectricity, [24,25] and triboelectricity.…”

Section: Introductionmentioning

confidence: 99%

Threadlike Piezoelectric Sensors Based on Ferroelectrets and Their Application in Washable and Breathable Smart Clothing

Xiang

Zhou

et al. 2023

Adv Materials Technologies

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Ferroelectrets, featuring strong piezoelectric activity, flexibility, lightweight, and low cost, are advanced material and have attractive prospects for various sensors and actuators. However, large-scale production of ferroelectret-based devices and their straightforward implementation in complicated structures remain difficult tasks. In this study, a novel self-shielding threadlike piezoelectric pressure sensor based on irradiation cross-linked polypropylene (IXPP) ferroelectrets with a symmetric coaxial structure, named Ferroelectret Coaxial Sensor (FCS), is designed, prepared, and characterized. Besides, such sensors with a length of up to 300 m are successfully produced by an industrial continuous production line, confirming that the fabrication procedure is compatible with it and that the FCS can be mass-produced in the future. The results show that the hydrostatic piezoelectric coefficient up to 55 pC/N is achieved in the FCS, which is around four times of magnitude higher than those of commercially available piezo-cables made of poly (vinylidene fluoride). Smart carpets and wristers weaved with an integrated FCS, that can be produced by an industrial production line, are sensitive, flexible/stretchable, washable, and breathable, demonstrating great potential in motion recognition for health care. A laboratory prototype of traffic sensors based on the FCS indicates its capability in speed meauring and dynamic weighing for vehicles. This study will greatly promote applications of ferroelectrets in wearable devices, smart housing, intelligent transportation, etc.

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Flexible, durable, and washable triboelectric yarn and embroidery for self-powered sensing and human-machine interaction

Cited by 43 publications

References 51 publications

Skin-Inspired Ultra-Tough Supramolecular Multifunctional Hydrogel Electronic Skin for Human–Machine Interaction

Skin-Inspired Ultra-Tough Supramolecular Multifunctional Hydrogel Electronic Skin for Human–Machine Interaction

Transparent, Stretchable, and Adhesive Conductive Ionic Hydrogel-Based Self-Powered Sensors for Smart Elderly Care Systems

Threadlike Piezoelectric Sensors Based on Ferroelectrets and Their Application in Washable and Breathable Smart Clothing

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