Stretchable and highly sensitive polyelectrolyte microgels-enhanced polyacrylamide hydrogel composite for strain sensing

Wu, Jiamin; Xu, Dan; Feng, Zhaoxue; Zhu, Longxiang; Dong, Chaohong; Qiu, Jianhui

doi:10.1016/j.coco.2022.101332

Cited by 14 publications

(6 citation statements)

References 18 publications

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“…The slope of the curve, referred to as the GF, was used to assess the strain sensitivity of the PPT hydrogels. The measured curve can be divided into three main linear parts, which were mainly caused by a non-linear deformation of hydrogel networks in different strain ranges (Figure D) . In the relatively low strain range (0–600%), the GF of the PPT hydrogels was 0.4 and the fitting coefficient ( R 2 ) was 0.9296.…”

Section: Resultsmentioning

confidence: 99%

“…The measured curve can be divided into three main linear parts, which were mainly caused by a non-linear deformation of hydrogel networks in different strain ranges (Figure 4D). 46 In the relatively low strain range (0−600%), the GF of the PPT hydrogels was 0.4 and the fitting coefficient (R 2 ) was 0.9296. The GF and linearity (R 2 ) in the middle strain range (600− 1400%) were 1.2 and 0.9912, respectively, while those in the high strain range (1400−2000%) were 2.5 and 0.9907, respectively.…”

Section: Self-healing and Electricalmentioning

confidence: 97%

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3D Printable Self-Adhesive and Self-Healing Ionotronic Hydrogels for Wearable Healthcare Devices

Seong

Kondaveeti

Choi

et al. 2023

ACS Appl. Mater. Interfaces

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Ionotronic hydrogels have attracted significant attention in emerging fields such as wearable devices, flexible electronics, and energy devices. To date, the design of multifunctional ionotronic hydrogels with strong interfacial adhesion, rapid self-healing, three-dimensional (3D) printing processability, and high conductivity are key requirements for future wearable devices. Herein, we report the rational design and facile synthesis of 3D printable, self-adhesive, self-healing, and conductive ionotronic hydrogels based on the synergistic dual reversible interactions of poly(vinyl alcohol), borax, pectin, and tannic acid. Multifunctional ionotronic hydrogels exhibit strong adhesion to various substrates with different roughness and chemical components, including porcine skin, glass, nitrile gloves, and plastics (normal adhesion strength of 55 kPa on the skin). In addition, the ionotronic hydrogels exhibit intrinsic ionic conductivity imparting strain-sensing properties with a gauge factor of 2.5 up to a wide detection range of approximately 2000%, as well as improved self-healing behavior. Based on these multifunctional properties, we further demonstrate the use of ionotronic hydrogels in the 3D printing process for implementing complex patterns as wearable strain sensors for human motion detection. This study is expected to provide a new avenue for the design of multifunctional ionotronic hydrogels, enabling their potential applications in wearable healthcare devices.

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Section: Resultsmentioning

confidence: 99%

Section: Self-healing and Electricalmentioning

confidence: 97%

3D Printable Self-Adhesive and Self-Healing Ionotronic Hydrogels for Wearable Healthcare Devices

Seong

Kondaveeti

Choi

et al. 2023

ACS Appl. Mater. Interfaces

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show abstract

“…Human skin can not only act as a biological barrier to protect the internal tissues and organs but also serve as a multisensory sensor to perceive the outside world, which can detect strain, pressure, shear, temperature, and humidity. − To mimic these versatile sensing capabilities of natural skin, various flexible electronic-skin (e-skin) sensors have been developed to realize individual sensing functions, including strain, pressure, temperature, and humidity sensors. − Basically, the principle of these sensors is to convert external stimuli into electrical signals, such as resistance, − capacitance, − current, − or voltage, − which can be collected and analyzed by a computer. Up to now, most sensors can only realize one single sense function. , Thus, there is a need to integrate different types of sensors together to achieve multisensory sensing capabilities of e-skin as it is desirable for one single sensor to possess different sensing capabilities.…”

Section: Introductionmentioning

confidence: 99%

Flexible and Transparent Electronic Skin Sensor with Sensing Capabilities for Pressure, Temperature, and Humidity

Chen

Liu

et al. 2023

ACS Appl. Mater. Interfaces

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Inspired by the interlocked biological geometry of human skin, herein, we design a flexible and transparent sensor with interlocked square column arrays with composites of Ag nanoparticles (AgNPs), citric acid (CA), and poly(vinyl alcohol) (PVA), which exhibit multisensory capabilities for pressure, temperature, and humidity. As a flexible pressure sensor, the interlocked AgNPs/CA/PVA sensor possesses a high sensitivity (−1.82 kPa–1), low detection limit (10 Pa), fast response (75 ms), and outstanding stability due to the high sensitivity of the contact resistance of the interlocked square column arrays to pressure. Because of the rigid dependence of the resistance of the AgNPs/CA/PVA composite on temperature, the interlocked AgNPs/CA/PVA sensor can also act as a temperature sensor, which exhibits high resolution (0.1 °C) and reliability in detecting ambient temperature. In addition, it is found that the amount of water molecules adsorbed by PVA and CA changes with the ambient humidity. Therefore, the interlocked AgNPs/CA/PVA sensor is also able to detect humidity in real time. This work proposes a simple but useful route to fabricate a flexible and transparent electrical skin sensor, which has great potential in the perception of pressure, temperature, and humidity.

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“…On the other hand, a broad detection range (>100%) is always required by the sensors when detecting large-scale motions such as joint movements. [11][12][13][14] For this purpose, numerous research efforts have been devoted to developing advanced sensitive materials and sensory devices combining the above two characteristics. [15][16][17][18] Piezoresistive strain/tactile sensors that incorporate a brittle and a conductive thin lm on top of a exible substrate have been previously developed to obtain high sensitivity.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, a broad detection range (>100%) is always required by the sensors when detecting large-scale motions such as joint movements. 11–14 For this purpose, numerous research efforts have been devoted to developing advanced sensitive materials and sensory devices combining the above two characteristics. 15–18…”

Section: Introductionmentioning

confidence: 99%

Presenting the shape of sound through a dual-mode strain/tactile sensor

Chang,

Dong,

Mao

et al. 2023

J. Mater. Chem. A

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Stretchable and highly sensitive polyelectrolyte microgels-enhanced polyacrylamide hydrogel composite for strain sensing

Cited by 14 publications

References 18 publications

3D Printable Self-Adhesive and Self-Healing Ionotronic Hydrogels for Wearable Healthcare Devices

3D Printable Self-Adhesive and Self-Healing Ionotronic Hydrogels for Wearable Healthcare Devices

Flexible and Transparent Electronic Skin Sensor with Sensing Capabilities for Pressure, Temperature, and Humidity

Presenting the shape of sound through a dual-mode strain/tactile sensor

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