A facile strategy for fabricating self-healable, adhesive and highly sensitive flexible ionogel-based sensors

Wu, Yingxue; Jiang, Wenxing; Zhao, Tianyu; Wang, Jiadong; Zhang, Xianhong; Chen, Dong; Ma, Yuhong; Yang, Wantai

doi:10.1039/d2tc04006a

Cited by 10 publications

(6 citation statements)

References 53 publications

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“…Strain sensitivity was represented by the strain gauge factor (GF), which was calculated by the slope of Δ R / R 0 –strain curves. 43 As shown in Fig. 5(b), the GF of Cho-Asp 10% ionogel was 2.02 in the range of 0–100% of strain, while it reached 1.79 when the ionogel continued to stretch in the range of 100–300% of strain.…”

Section: Resultsmentioning

confidence: 81%

Polyionic liquid ionogels formed via hydrophobic association for flexible strain sensors

Ren,

He,

Long

et al. 2024

J. Mater. Chem. C

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Section: Resultsmentioning

confidence: 81%

Polyionic liquid ionogels formed via hydrophobic association for flexible strain sensors

Ren,

He,

Long

et al. 2024

J. Mater. Chem. C

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“…Polymerizable MAH-2959 was synthesized via the reaction of Irgacure 2959 and maleic anhydride . The PAA/MEA/CQS eutectogel was prepared via the one-step photopolymerization of AA with the presence of MEA in the CQS-DES solution initiated by MAH-2959.…”

Section: Methodsmentioning

confidence: 99%

“…Polymerizable MAH-2959 was synthesized via the reaction of Irgacure 2959 and maleic anhydride. 36 The PAA/MEA/CQS eutectogel was prepared via the one-step photopolymerization of AA with the presence of MEA in the CQS-DES solution initiated by MAH-2959. In detail, CCl (5.58 g, 0.04 mol) and urea (4.80 g, 0.08 mol) were first mixed and stirred at 80 °C for 90 min, leading to the successful formation of CCl-U DES.…”

Section: Methodsmentioning

confidence: 99%

“…While there has been plenty of research on physically cross-linked eutectogels employing hydrogen bonding and solvophobic interactions, noncovalent eutectogels based on electrostatic interactions have received much less attention . We recently demonstrated that simultaneous integration of excellent mechanical and electrical properties, strong adhesiveness, outstanding self-healing ability, as well as multiple sensing capabilities into a eutectogel could be facilely achieved by introducing two oppositely charged polyelectrolytes into a green DES. , In particular, electrostatic interactions between two oppositely charged branched polyelectrolytes are strong enough to provide physical eutectogels with widely tunable mechanical properties and remarkable self-healing ability. Furthermore, it is reported that the incorporation of natural polymers, such as cellulose, chitosan, gelatin, , and agarose, into the ionogels and eutectogels could offer some attractive properties while maintaining their original properties.…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, eutectogels with excellent comprehensive properties were prepared by photopolymerization of acrylic acid (AA) in the presence of monoethanolamine (MEA) and chitosan quaternary ammonium salt (CQS) with DES composed of choline chloride and urea (CCl-U) as reaction media. In our present study, a polymerizable photoinitiator (MAH-2959, a product of Irgacure 2959 and maleic anhydride) 36 was utilized to avoid the problems associated with residual initiator and construct a branched polyacrylic acid (PAA) network, which can withstand large deformations. Since MEA with both hydroxyl and amine groups is fully compatible with CCl-U and PAA, a dynamic PAA-MEA supramolecular network could be effectively formed in CCl-U.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Degradable Supramolecular Eutectogel-Based Ionic Skin with Antibacterial, Adhesive, and Self-Healable Capabilities

Yang

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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The development of degradable, cost-effective, and eco-friendly ionic conductive gels is highly required to reduce electronic waste originating from flexible electronic devices. However, biocompatible, degradable, tough, and durable conductive gels are challenging to achieve. Herein, we develop a facile strategy for the design and synthesis of degradable tough eutectogels by integrating an electrostatically driven supramolecular network composed of branched polyacrylic acid (PAA) and monoethanolamine (MEA) into a green deep eutectic solvent with chitosan quaternary ammonium salt (CQS). The specially designed PAA/MEA/CQS eutectogels present multiple desired properties, including high transparency, widely adjustable mechanical properties, high resilience, reliable adhesiveness, excellent selfhealing ability, good conductivity, remarkable anti-freezing performance, and antibacterial properties. The dynamic and reversible supramolecular interactions not only significantly enhance the mechanical properties of the PAA/MEA/CQS eutectogels but also enable fast degradation, addressing the dilemma between mechanical strength and degradability. More importantly, a biocompatible and degradable multifunctional ionic skin is successfully fabricated based on the PAA/MEA/CQS eutectogel, exhibiting high sensitivity, a wide sensing range, and a rapid response speed toward strain, pressure, and temperature. Thus, this study offers a promising strategy for fabricating degradable tough eutectogels, which show great potential as high-performance ionic skins for nextgeneration flexible wearable electronic devices.

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Ultra‐high stretchability and wide temperature range adhesion hydrogels for flexible sensor

Gao,

Sun,

Guan

et al. 2024

J of Applied Polymer Sci

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Ensuring adhesion over wide temperature range is of considerable significance for hydrogel‐based wearable sensors, especially in extreme environments. In this research, a hydrogel with adhesive properties over a wide temperature range (−20–80°C) was prepared by copolymerizing 2‐acrylamido‐2‐methylpropanesulfonic acid (AMPS), acrylic acid (AAc), and sodium lignosulfonate (LS) in binary solvent of H2O and glycerol (Gly). Hence, the hydrogel acquires adhesive properties through the establishment of non‐covalent interactions with the substrate surface, encompassing hydrogen bonding, metal complexation, and electrostatic interactions. At −20°C, ambient temperature (20°C), and 80°C, the hydrogel exhibits significant shear strength of 39.8, 74.3, and 46.9 kPa. In addition, chemical crosslinking points, hydrogen bonding and electrostatic interaction are imparted with good mechanical properties to withstand large tensile and flexible deformation, achieving a fracture stress of 120 kPa and a strain of 14,288%. Furthermore, the hydrogel exhibits outstanding electrical conductivity, reaching up to 1.58 S/m owing to a substantial concentration of free conductive ions. Moreover, this sensor is able to provide a constant and stable change in electrical resistance signal and is used to monitor human movement signals. This makes it possible to employ AAc/AMPS/H2O/Gly/LS hydrogels as wearable flexible sensors in extreme environments.

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A facile strategy for fabricating self-healable, adhesive and highly sensitive flexible ionogel-based sensors

Abstract: Stretchable ionogels have been intensively investigated for the development of flexible and wearable sensors. Integration of excellent mechanical properties, high conductivity, reliable adhesiveness, remarkable self-healing ability, favorable transparency and biocompatibility...

Cited by 10 publications

References 53 publications

Polyionic liquid ionogels formed via hydrophobic association for flexible strain sensors

Polyionic liquid ionogels formed via hydrophobic association for flexible strain sensors

Degradable Supramolecular Eutectogel-Based Ionic Skin with Antibacterial, Adhesive, and Self-Healable Capabilities

Ultra‐high stretchability and wide temperature range adhesion hydrogels for flexible sensor

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