Journal ArticleDOI
Conductive Self-Healing Nanocomposite Hydrogel Skin Sensors with Antifreezing and Thermoresponsive Properties.
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TLDR
In this paper, conductive nanocomposite hydrogels (NC gels) were delicately designed and prepared via gelation of oligo(ethylene glycol) methacrylate (OEGMA)-based monomers in a glycerol-water cosolvent, where inorganic clay served as the physical crosslinker and provided conductive ions.Abstract:
With growing interest in flexible and wearable devices, the demand for nature-inspired soft smart materials, especially intelligent hydrogels with multiple perceptions toward external strain and temperatures to mimic the human skin, is on the rise. However, simultaneous achievement of intelligent hydrogels with skin-compatible performances, including good transparency, appropriate mechanical properties, autonomous self-healing ability, multiple mechanical/thermoresponsiveness, and retaining flexibility at subzero temperatures, is still challenging and thus limits their application as skinlike devices. Here, conductive nanocomposite hydrogels (NC gels) were delicately designed and prepared via gelation of oligo(ethylene glycol) methacrylate (OEGMA)-based monomers in a glycerol-water cosolvent, where inorganic clay served as the physical cross-linker and provided conductive ions. The resultant NC gels exhibited good conductivity (∼3.32 × 10-4 S cm-1, akin to biological muscle tissue) and an autonomously self-healing capacity (healing efficiency reached 84.8%). Additionally, such NC gels displayed excellent flexibility and responded well to multiple strain/temperature external stimuli and subtle human motions in a wide temperature range (from -20 to 45 °C). These distinguished properties would endow such NC gels significant applications in fields of biosensors, human-machine interfaces, and soft robotics.read more
Citations
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Stretchable, self-healing and tissue-adhesive zwitterionic hydrogels as strain sensors for wireless monitoring of organ motions
TL;DR: In this article, a stretchable, self-healing and polydopamine zwitterionic nanocomposite hydrogels are used to provide reversible and robust adhesion to tissues with a strength up to 19.4 kPa and a strain sensitivity of 4.3.
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Nanocomposite hydrogel-based strain and pressure sensors: a review
TL;DR: In this article, the authors provide an up-to-date and comprehensive summary of research progresses of nanocomposite hydrogel-based strain and pressure sensors including designing strategies, preparing methods and applications of the five nanofiller-based sensors.
Journal ArticleDOI
Multifunctional conductive hydrogel-based flexible wearable sensors
TL;DR: This review focuses on the multifunctional conductive hydrogels-based flexible wearable sensors with self-healing, self-adhesion, or anti-freezing capabilities, and provides a personal perspective on the future development, and addresses the remaining challenges in the commercialization.
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Recent Progress in Essential Functions of Soft Electronic Skin
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Ionic conductive hydrogels with long-lasting antifreezing, water retention and self-regeneration abilities
Xiaojie Sui,Hongshuang Guo,Chengcheng Cai,Qingsi Li,Chiyu Wen,Xiangyu Zhang,Xiaodong Wang,Jing Yang,Lei Zhang +8 more
TL;DR: In this article, a novel ionic conductive poly (sulfobetaine-co-acrylic acid) hydrogel possessing antifreezing, water retention and self-regeneration abilities was developed by introducing a highly hydratable salt-lithium chloride.
References
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Journal ArticleDOI
Nanocomposite Hydrogels: A Unique Organic–Inorganic Network Structure with Extraordinary Mechanical, Optical, and Swelling/De‐swelling Properties
TL;DR: In this paper, a novel nanocomposite hydrogels (NC gels) with a unique organic-inorganic (clay) network structure have been synthesized by in-situ free radical polymerization.
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The skin: an indispensable barrier
TL;DR: Changes in epidermal differentiation and lipid composition lead to a disturbed skin barrier, which allows the entry of environmental allergens, immunological reaction and inflammation in atopic dermatitis.
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Point by point comparison of two thermosensitive polymers exhibiting a similar LCST: is the age of poly(NIPAM) over?
TL;DR: P(MEO2MA-co-OEGMA) copolymers can be considered as ideal structures, which combine both the properties of poly(ethylene glycol) and PNIPAM in a single macromolecule.
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25th Anniversary Article: Rational Design and Applications of Hydrogels in Regenerative Medicine
Nasim Annabi,Nasim Annabi,Ali Tamayol,Ali Tamayol,Jorge Alfredo Uquillas,Jorge Alfredo Uquillas,Mohsen Akbari,Mohsen Akbari,Luiz E. Bertassoni,Luiz E. Bertassoni,Chaenyung Cha,Chaenyung Cha,Gulden Camci-Unal,Gulden Camci-Unal,Mehmet R. Dokmeci,Mehmet R. Dokmeci,Nicholas A. Peppas,Ali Khademhosseini,Ali Khademhosseini +18 more
TL;DR: The development of advanced hydrogel with tunable physiochemical properties is highlighted, with particular emphasis on elastomeric, light‐sensitive, composite, and shape‐memory hydrogels, and a number of potential applications and challenges in the utilization in regenerative medicine are reviewed.