A Self-Healable Bifunctional Electronic Skin

Gao, Zhiyi; Lou, Zheng; Han, Wei; Shen, Guozhen

doi:10.1021/acsami.0c05119

Cited by 68 publications

(40 citation statements)

References 32 publications

(44 reference statements)

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“…Of many approaches that have been explored to fabricate self‐healable heterogenous PU networks, three typical approaches are summarized here. Further, many reports describe the utilization of intrinsic hydrogen bonding of urethane (or carbamate) linkages labeled in PU copolymers for self‐healing [ 127–131 ] This section focuses on the integration of dynamic covalent bonds to achieve self‐healability and reprocessability.…”

Section: Fabrication Of Self‐healable Heterogeneous Pu Compositesmentioning

confidence: 99%

Dynamic Covalent Polyurethane Network Materials: Synthesis and Self‐Healability

Nellepalli

Patel

2021

Macromol. Rapid Commun.

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Polyurethane (PU) has not only been widely used in the daily lives, but also extensively explored as an important class of the essential polymers for various applications. In recent years, significant efforts have been made on the development of self‐healable PU materials that possess high performance, extended lifetime, great reliability, and recyclability. A promising approach is the incorporation of covalent dynamic bonds into the design of PU covalently crosslinked polymers and thermoplastic elastomers that can dissociate and reform indefinitely in response to external stimuli or autonomously. This review summarizes various strategies to synthesize self‐healable, reprocessable, and recyclable PU materials integrated with dynamic (reversible) Diels–Alder cycloadduct, disulfide, diselenide, imine, boronic ester, and hindered urea bond. Furthermore, various approaches utilizing the combination of dynamic covalent chemistries with nanofiller surface chemistries are described for the fabrication of dynamic heterogeneous PU composites.

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Section: Fabrication Of Self‐healable Heterogeneous Pu Compositesmentioning

confidence: 99%

Dynamic Covalent Polyurethane Network Materials: Synthesis and Self‐Healability

Nellepalli

Patel

2021

Macromol. Rapid Commun.

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“…Flexible multifunctional sensors capable of detecting important physical stimuli such as strain, pressure, and temperature have responses toward specific stimuli into a single device. [16,20] For this purpose, resistive TSs and capacitive pressure sensors (PSs) are commonly stacked for multifunctional sensing, making use of their respective pressure and temperature insensitivity. [16,20,29] Despite their simple device structures, however, the various materials required to produce individual sensors make the overall fabrication process complex and uneconomical.…”

Section: Introductionmentioning

confidence: 99%

“…[16,20] For this purpose, resistive TSs and capacitive pressure sensors (PSs) are commonly stacked for multifunctional sensing, making use of their respective pressure and temperature insensitivity. [16,20,29] Despite their simple device structures, however, the various materials required to produce individual sensors make the overall fabrication process complex and uneconomical. Moreover, utilization of two different sensors with different functions entails analyzing two different outputs, necessitating an elaborate signal processing and readout system.…”

Section: Introductionmentioning

confidence: 99%

“…[11][12][13][14] To simultaneously monitor more than one type of physical stimuli, sensor networks consisting of multiple sensors should detect and decouple multiple sources of stimuli such as strain, pressure, and temperature without interference among them. [15][16][17] Generally, the state-of-the-art flexible multifunctional sensors are designed to detect and decouple different combinations of various physical stimuli, for example, strain and temperature, [15] bending and pressure, [18] tactile and touchless interaction, [19] and pressure and temperature. [20] Among them, the multifunctional sensors capable of detecting and decoupling pressure and temperature stimuli have gained increasing interests in an effort to duplicate the indispensable pressure and temperature sensing capability of human skin, the largest sensory organ of a human body.…”

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confidence: 99%

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Rational Design of All Resistive Multifunctional Sensors with Stimulus Discriminability

Lee

Kim

Zhang

et al. 2021

Adv Funct Materials

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A rational approach is proposed to design soft multifunctional sensors capable of detection and discrimination of different physical stimuli. Herein, a flexible multifunctional sensor concurrently detecting and distinguishing minute temperature and pressure stimuli in real time is developed using electrospun carbon nanofiber (CNF) films as the sole sensing material and electrical resistance as the only output signal. The stimuli sensitivity and discriminability are coordinated by tailoring the atomic-and device-level structures of CNF films to deliver outstanding pressure and temperature sensitivities of −0.96 kPa −1 and −2.44% °C−1 , respectively, enabling mutually exclusive sensing performance without signal cross-interference. The CNF multifunctional sensor is considered the first of its kind to accomplish the stimulus discriminability using only the electrical resistance as the output signal, which is most convenient to monitor and process for device applications. As such, it has distinct advantages over other reported sensors in its simple, cost-effective fabrication and readout system. It also possesses other invaluable traits, including good bending stability, fast response time, and long-term durability. Importantly, the ability to simultaneously detect and decouple temperature and pressure stimuli is demonstrated through novel applications as a skin-mountable device and a flexible game controller.

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“…[ 20,21 ] On the other hand, for the development of advanced technologies like human–machine interfaces, the creation of new electronic devices and components having human‐like multifunctional properties is more critical. In general, the combination of electroconducting, stretching, and self‐healing abilities is a promising direction to meet the criteria for developing advanced technologies and applications, including soft robotics, [ 22,23 ] wearable healthcare electronics, [ 24–29 ] electronic/artificial skin and skin‐like electronics, [ 30–38 ] energy harvesting, and energy storage devices. [ 39–43 ]…”

Section: Introductionmentioning

confidence: 99%

Intrinsically Stretchable and Self‐Healing Electroconductive Composites Based on Supramolecular Organic Polymer Embedded with Copper Microparticles

Yeasmin

Duy

Han

et al. 2020

Adv Elect Materials

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Integration of electrical conductivity, stretchability, and self‐healing properties of electronic material is a promising way to meet the criteria for developing next‐generation technologies ranging from ordinary sustainable electronics to high‐tech human–machine interfaces. To this particular purpose, a cost‐effective composite material having simultaneous functionalities of electrical conductivity, stretchability, and self‐healability based on supramolecular organic polymer and copper microparticles is presented. The composite can be mass‐produced via the sol–gel method and is tunable by adjusting the copper loading. Electrical and mechanical characterizations show that the composite material owns not only a high stretchability (≥120%) but also an excellent self‐healability at ambient conditions within 5 min. The healing efficiency is about 90% for its mechanical property and almost 100% for its electrical properties. Besides, the electrical properties are found in the range of semiconductors that can be restored upon five cutting–healing cycles. One‐step further, the developed material is utilized to fabricate a wearable strain sensor. Also, real‐time human motion detection is demonstrated using the fabricated sensor. These results exhibit the potential of the material for developing self‐healing electronic devices and show promising directions in the field of wearable and sustainable electronics, human–machine interfaces.

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A Self-Healable Bifunctional Electronic Skin

Cited by 68 publications

References 32 publications

Dynamic Covalent Polyurethane Network Materials: Synthesis and Self‐Healability

Dynamic Covalent Polyurethane Network Materials: Synthesis and Self‐Healability

Rational Design of All Resistive Multifunctional Sensors with Stimulus Discriminability

Intrinsically Stretchable and Self‐Healing Electroconductive Composites Based on Supramolecular Organic Polymer Embedded with Copper Microparticles

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