A highly tough, fatigue-resistant, low hysteresis hybrid hydrogel with a hierarchical cross-linked structure for wearable strain sensors

Guan, Shaokang; Chen, Xu; Dong, Xufeng; Qi, Min

doi:10.1039/d3ta02584e

Cited by 15 publications

(3 citation statements)

References 62 publications

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“…S6†). 35 Furthermore, the EDS spectrum reveals a uniform distribution of zinc elements on the surface of the hydrogel equilibrated in a bimetallic salt solution, which further corroborates the existence of interactions between zinc ions and the hydrogels (Fig. S7 and S8†).…”

Section: Resultssupporting

confidence: 69%

“…Finally, the robust self-powered hydrogels were obtained by immersing the original hydrogels in a bimetallic salt solution, which was based on the salting-out effect, metal coordination, and electrostatic interactions. 34–36 In comparison to methods such as photopolymerization and thermally induced techniques for hydrogel preparation, this study did not involve the use of any environmentally unfriendly initiators or solvents. Instead, the process is rapid, green, and utilizes environmentally friendly polymers as raw materials.…”

Section: Resultsmentioning

confidence: 99%

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Constructing robust and recyclable self-powered polysaccharide-based hydrogels by adjusting Zn²⁺/Li⁺ bimetallic networks

Zhou,

Yang,

et al. 2024

Green Chem.

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Section: Resultssupporting

confidence: 69%

Section: Resultsmentioning

confidence: 99%

Constructing robust and recyclable self-powered polysaccharide-based hydrogels by adjusting Zn²⁺/Li⁺ bimetallic networks

Zhou,

Yang,

et al. 2024

Green Chem.

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“…Fatigue resistance is a crucial characteristic for cyclic actuations in practical applications. 31 Therefore, the reversibility and recovery of the sacrificial bonds in the P (AA-co-LMA)-Zr 4+ hydrogel was probed through cycle tensile testing. The hydrogel was subjected to continuous loading-unloading cycles at various tensile strains ranging from 100% to 800%, and the corresponding dissipation energy was subsequently calculated (Figure S4 a, b, Supporting Information).…”

Section: Mechanical Propertiesmentioning

confidence: 99%

A responsive supramolecular hydrogel with robust mechanical properties for actuator and strain sensor

Huang,

Dong,

et al. 2024

J of Applied Polymer Sci

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Responsive hydrogels hold great promise for applications such as biological tissue engineering, controlled drug release, soft actuators, and intelligent sensors. However, the design and construction of robust responsive hydrogels using a simple method remains a significant challenge. Herein, a non‐covalently crosslinked responsive hydrogel was constructed by introducing carboxyl‐Zr4+ metal coordination to the hydrophobic association network of P(AA‐co‐LMA) hydrogel through a facile one‐pot polymerization method. The incorporation of multiple reversible interactions, including hydrogen bonding, metal coordination, and hydrophobic association, resulted in a responsive hydrogel with exceptional mechanical strength (≈2.92 MPa), outstanding flexibility (elongation>1000%), and rapid response to pH alterations. Furthermore, the hydrogel also presented good ionic conductivity due to the abundant movable ions, as well as high sensitivity and stability. As application demonstrations, the supermolecular hydrogel had been successfully used in actuating and strain sensing. This work establishes an effective design strategy for creating tough and multifunctional responsive hydrogel.

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pH‐Gated Switch of LCST‐UCST Phase Transition of Hydrogels

He,

Zhou,

et al. 2024

Adv Funct Materials

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Temperature‐responsive hydrogels including lower critical solution temperature (LCST)‐ and upper critical solution temperature (UCST)‐type hydrogels are attractive in various fields. However, the swift switch between LCST and UCST stimuli‐responsive behaviors remains intriguing and challenging. Here is reported a kind of hydrogel with pH‐gated LCST and UCST response behaviors. This is achieved using the hydrogen bonding between carboxylic acid groups of poly(acrylic acid‐co‐acrylamide) and hydroxyl groups of hydroxypropyl cellulose (HPC). The poly(acrylic acid‐co‐acrylamide)‐HPC (PACA‐HPC) hydrogels exhibit pH‐gated reversible LCST‐UCST phase transition behavior. When the transparent PACA‐HPC hydrogel is placed in an acid bath, the COO− groups get protonated, rapidly forming hydrogen bonds with HPC to render a light‐scattering state making the hydrogel opaque. Furthermore, the opaque hydrogel exhibits UCST phase transition behavior at 20–45 °C. When the opaque PCAC‐HPC hydrogel is placed in an alkaline environment, hydrogen‐bonded complexes gradually dissociate as the COOH groups are deprotonated to form a homogeneous transparent state. The transparent hydrogel exhibits LCST phase transition behavior at 20–45° C. Therefore, is shown the hydrogen bonding strategy to fabricate hydrogels with tunable LCST and UCST responses. With this pH‐gated hydrogel with switchable LCST/UCST responsive behaviors, are demonstrated its applications in smart windows and information encryption.

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A highly tough, fatigue-resistant, low hysteresis hybrid hydrogel with a hierarchical cross-linked structure for wearable strain sensors

Abstract: Hydrogel is considered to be one of the promising candidates for wearable sensors due to its ideal designability and excellent mechanical flexibility. Nevertheless, the preparation of ion-conductive hydrogel with excellent...

Cited by 15 publications

References 62 publications

Constructing robust and recyclable self-powered polysaccharide-based hydrogels by adjusting Zn²⁺/Li⁺ bimetallic networks

Constructing robust and recyclable self-powered polysaccharide-based hydrogels by adjusting Zn²⁺/Li⁺ bimetallic networks

A responsive supramolecular hydrogel with robust mechanical properties for actuator and strain sensor

pH‐Gated Switch of LCST‐UCST Phase Transition of Hydrogels

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A highly tough, fatigue-resistant, low hysteresis hybrid hydrogel with a hierarchical cross-linked structure for wearable strain sensors

Abstract: Hydrogel is considered to be one of the promising candidates for wearable sensors due to its ideal designability and excellent mechanical flexibility. Nevertheless, the preparation of ion-conductive hydrogel with excellent...

Cited by 15 publications

References 62 publications

Constructing robust and recyclable self-powered polysaccharide-based hydrogels by adjusting Zn2+/Li+ bimetallic networks

Constructing robust and recyclable self-powered polysaccharide-based hydrogels by adjusting Zn2+/Li+ bimetallic networks

A responsive supramolecular hydrogel with robust mechanical properties for actuator and strain sensor

pH‐Gated Switch of LCST‐UCST Phase Transition of Hydrogels

Contact Info

Product

Resources

About

Constructing robust and recyclable self-powered polysaccharide-based hydrogels by adjusting Zn²⁺/Li⁺ bimetallic networks

Constructing robust and recyclable self-powered polysaccharide-based hydrogels by adjusting Zn²⁺/Li⁺ bimetallic networks