Robust, anti-freezing and conductive bonding of chitosan-based double-network hydrogels for stable-performance flexible electronic

Yang, Yanyu; Zhou, Manhua; Peng, Junbo; Wang, Xing; Liu, Yang; Wang, Wanjie; Wu, Decheng

doi:10.1016/j.carbpol.2021.118753

Cited by 53 publications

(32 citation statements)

References 41 publications

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“…Afterwards, robust, anti‐freezing and conductive bonding between chitosan‐based conductive hydrogel and metal electrode was successfully constructed via covalent linkage, allowing the multi‐model hydrogel‐metal resistance‐type sensor to detect strain and pressure with significant stability. [ 113 ]…”

Section: Applicationsmentioning

confidence: 99%

Energy‐Dissipative and Soften Resistant Hydrogels Based on Chitosan Physical Network: From Construction to Application

Yang

2022

Chin. J. Chem.

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In spite of biological tissue-like peculiarity, multifarious functionalities and great application prospect, the low mechanics and soften behavior of hydrogels still retain a problem to be addressed for repetitive weight-bearing fields of flexible electronics, actuators, substitutions of soft tissues, wound dressing, wearable or implantable devices. Due to the distinct combination of diversity, reversibility and impressive disruption-reconstruction capacity, the chitosan physical cross-links can server as recoverable "sacrificial bonds" to construct multifarious energy-dissipative and anti-soften hydrogels and further broaden their diversified applications. In this review, we summarized the gelation mechanisms of chitosan physical networks and highlighted the chitosan physical network based hydrogels in rational design, construction principle, and structure and performance regulation. The recent progress in functional hydrogels for flexible electronics and biomaterials was systematically discussed. Overall, the review will provide comprehensive guidelines on the design principle, performance modulation and functionality construction of energy-dissipative and soften resistant hydrogels.

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Section: Applicationsmentioning

confidence: 99%

Energy‐Dissipative and Soften Resistant Hydrogels Based on Chitosan Physical Network: From Construction to Application

Yang

2022

Chin. J. Chem.

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“…In recent years, research into hydrogels has made significant breakthroughs (e.g., self-healing hydrogels [ 88 , 89 , 90 , 113 ], smart hydrogels [ 98 ], cellulose hydrogels [ 97 ], double chain hydrogels [ 114 ], supramolecular hydrogels [ 115 ], etc.). However, most of the research focuses on hydrogel functionality, as for flexible wearable sensors, drug delivery, and medical engineering.…”

Section: Concluding Remarksmentioning

confidence: 99%

Modeling Tunable Fracture in Hydrogel Shell Structures for Biomedical Applications

Zhang

Qiu

Elkhodary

et al. 2022

Gels

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Hydrogels are nowadays widely used in various biomedical applications, and show great potential for the making of devices such as biosensors, drug- delivery vectors, carriers, or matrices for cell cultures in tissue engineering, etc. In these applications, due to the irregular complex surface of the human body or its organs/structures, the devices are often designed with a small thickness, and are required to be flexible when attached to biological surfaces. The devices will deform as driven by human motion and under external loading. In terms of mechanical modeling, most of these devices can be abstracted as shells. In this paper, we propose a mixed graph-finite element method (FEM) phase field approach to model the fracture of curved shells composed of hydrogels, for biomedical applications. We present herein examples for the fracture of a wearable biosensor, a membrane-coated drug, and a matrix for a cell culture, each made of a hydrogel. Used in combination with experimental material testing, our method opens a new pathway to the efficient modeling of fracture in biomedical devices with surfaces of arbitrary curvature, helping in the design of devices with tunable fracture properties.

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“…Although highly tensile and self-healing ionic hydrogels are usually reported, most synthetic ionic hydrogels exhibit strain-softening properties (Peng et al, 2022;Zhou et al, 2022). For stretchable ionic hydrogels, there are often conflicts between tensile properties, self-healing properties and high mechanical strength (Yang et al, 2022b;Zhao et al, 2022). In general, good tensile properties, self-healing property, and selfadhesion are favorable for the use of hydrogels in wearable devices .…”

Section: Introductionmentioning

confidence: 99%

Highly Transparent, Self-Healing, and Self-Adhesive Double Network Hydrogel for Wearable Sensors

Chen

Liu

Wang

et al. 2022

Front. Bioeng. Biotechnol.

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Hydrogel-based flexible electronic devices are essential in future healthcare and biomedical applications, such as human motion monitoring, advanced diagnostics, physiotherapy, etc. As a satisfactory flexible electronic material, the hydrogel should be conductive, ductile, self-healing, and adhesive. Herein, we demonstrated a unique design of mechanically resilient and conductive hydrogel with double network structure. The Ca2+ crosslinked alginate as the first dense network and the ionic pair crosslinked polyzwitterion as the second loose network. With the synthetic effect of these two networks, this hydrogel showed excellent mechanical properties, such as superior stretchability (1,375%) and high toughness (0.57 MJ/m3). At the same time, the abundant ionic groups of the polyzwitterion network endowed our hydrogel with excellent conductivity (0.25 S/m). Moreover, due to the dynamic property of these two networks, our hydrogel also performed good self-healing performance. Besides, our experimental results indicated that this hydrogel also had high optical transmittance (92.2%) and adhesive characteristics. Based on these outstanding properties, we further explored the utilization of this hydrogel as a flexible wearable strain sensor. The data strongly proved its enduring accuracy and sensitivity to detect human motions, including large joint flexion (such as finger, elbow, and knee), foot planter pressure measurement, and local muscle movement (such as eyebrow and mouth). Therefore, we believed that this hydrogel had great potential applications in wearable health monitoring, intelligent robot, human-machine interface, and other related fields.

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Robust, anti-freezing and conductive bonding of chitosan-based double-network hydrogels for stable-performance flexible electronic

Cited by 53 publications

References 41 publications

Energy‐Dissipative and Soften Resistant Hydrogels Based on Chitosan Physical Network: From Construction to Application

Energy‐Dissipative and Soften Resistant Hydrogels Based on Chitosan Physical Network: From Construction to Application

Modeling Tunable Fracture in Hydrogel Shell Structures for Biomedical Applications

Highly Transparent, Self-Healing, and Self-Adhesive Double Network Hydrogel for Wearable Sensors

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