Anti-freezing, resilient and tough hydrogels for sensitive and large-range strain and pressure sensors

Yang, Yanyu; Yang, Yatian; Cao, Yong; Wang, Xing; Chen, Yourong; Liu, Hongyan; Gao, Yafei; Wang, Jianfeng; Liu, Chao; Wang, Wanjie; Yu, Jia‐Kuo; Wu, Decheng

doi:10.1016/j.cej.2020.126431

Cited by 268 publications

(179 citation statements)

References 37 publications

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“…[ [113][114][115][116][117] Although there were many developed approaches on preparation of various hydrogel particles via physical and chemical techniques, [118][119][120] the design flexibility and complexity of hydrogel particles with the customized structures and properties were still very restricted, and the preparation of tailor-made microgels/nanogels remained a grand challenge. Wang et al reported a general controlled cross-linking strategy to create an organic-inorganic hybrid hydrogel via a hybrid precursor of POSS-(SS-PEG) 8 polymer ( Figure 13).…”

Section: Microgels/nanogels Of Poss-based Hybrid Materialsmentioning

confidence: 99%

“…Hydrogels including microgels/nanogels were a series of swollen microsized or nanosized crosslinking networks in fields of drug carriers, sensors, tissue engineering, etc . [ 113‐117 ] Although there were many developed approaches on preparation of various hydrogel particles via physical and chemical techniques, [ 118‐120 ] the design flexibility and complexity of hydrogel particles with the customized structures and properties were still very restricted, and the preparation of tailor‐made microgels/nanogels remained a grand challenge. Wang et al .…”

Section: Self‐assembly Of Poss‐based Hybrid Materials In Solutionsmentioning

confidence: 99%

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Polyhedral Oligomeric Silsesquioxanes (POSS)‐based Hybrid Materials: Molecular Design, Solution Self‐Assembly and Biomedical Applications

Fan

Wang

2021

Chin. J. Chem.

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Owing to the tremendous advantages and unique well‐defined nanoscale structure, polyhedral oligomeric silsesquioxanes (POSS) have received considerable interest in the design of novel organic‐inorganic hybrid nanomaterials with all manner of prominent capabilities, which is recognized as a new generation of promising materials for advanced applications of material science, engineering science and biomedical fields. Benefitting from the recent progress in combination of controlled/living polymerization and emerging click chemistry, POSS‐based hybrid materials with ingenious design, versatile topological structure and sophisticated multifunctionality have been successfully fabricated and developed into abundant well‐defined hybrid nanostructures with desired physicochemical properties. Tailor‐made amphiphilic molecular design and nanosized hybrid architecture provide opportunities for the self‐assembly of POSS‐based hybrid materials with unique hierarchical morphologies in selective solvents. Through the in‐depth understanding of structure‐properties relationship, POSS‐based hybrid materials can achieve the modulation of precise control of self‐assembling process and multi‐purpose applications with improved material performances. In this review, we summarize the recent advances of POSS‐based hybrid materials in molecular design, self‐assembly behavior in solutions and potential biomedical applications with main concerns on drug delivery, gene therapy, bioimaging and tissue engineering field. Finally, future directions and remaining challenges for further advancement of POSS‐based hybrid materials are proposed and discussed.

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Section: Microgels/nanogels Of Poss-based Hybrid Materialsmentioning

confidence: 99%

Section: Self‐assembly Of Poss‐based Hybrid Materials In Solutionsmentioning

confidence: 99%

Polyhedral Oligomeric Silsesquioxanes (POSS)‐based Hybrid Materials: Molecular Design, Solution Self‐Assembly and Biomedical Applications

Fan

Wang

2021

Chin. J. Chem.

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“…At room temperature, this material exhibited Young's modulus of 7.6 MPa, the tensile strength of 13.3 MPa, and toughness of 110.5 MJ/m 3 , making it 5.5 times tougher than the toughest anti-freezing gel ( Yang et al., 2021 ) and over 10 times tougher than tendon ( Maganaris and Narici, 2005 ). The exchange of liquid in gel from salt solution to DMSO/H 2 O mixture endowed the gel with superior mechanical performances at extremely low temperatures.…”

Section: Introductionmentioning

confidence: 99%

Tendon-inspired anti-freezing tough gels

Duan

Hua

et al. 2021

iScience

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Summary Hydrogels have gained tremendous attention due to their versatility in soft electronics, actuators, biomedical sensors, etc. Due to the high water content, hydrogels are usually soft, weak, and freeze below 0°C, which brings severe limitations to applications such as soft robotics and flexible electronics in harsh environments. Most existing anti-freezing gels suffer from poor mechanical properties and urgently need further improvements. Here, we took inspirations from tendon and coniferous trees and provided an effective method to strengthen polyvinyl alcohol (PVA) hydrogel while making it freeze resistant. The salting-out effect was utilized to create a hierarchically structured polymer network, which induced superior mechanical properties (Young's modulus: 10.1 MPa, tensile strength: 13.5 MPa, and toughness: 127.9 MJ/m 3 ). Meanwhile, the cononsolvency effect was employed to preserve the structure and suppress the freezing point to −60°C. Moreover, we have demonstrated the broad applicability of our material by fabricating PVA hydrogel-based hydraulic actuators and ionic conductors.

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“…Conductive hydrogels have shown great potential in wearable bioelectronic devices, human–machine interactions, health monitoring, flexible electronic skins, and medical bandages [ 1 , 2 , 3 , 4 , 5 ], owing to their softness, wetness, stretchability, biocompatibility, and wide tunable conductivity. However, the demands of practical versatility applications, such as load-bearing biosensors, soft robots, and real-time flexible wearable devices, require conductive hydrogels with further critical properties, such as robust mechanical performance, low hysteresis, fast self-recovery time, and rapid response to external stimuli.…”

Section: Introductionmentioning

confidence: 99%

Robust Conductive Hydrogels with Ultrafast Self-Recovery and Nearly Zero Response Hysteresis for Epidermal Sensors

Luo

Wang

et al. 2021

Nanomaterials

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Robust conductive hydrogels are in great demand for the practical applications of smart soft robots, epidermal electronics, and human–machine interactions. We successfully prepared nanoparticles enhanced polyacrylamide/hydroxypropyl guar gum/acryloyl-grafted chitosan quaternary ammonium salt/calcium ions/SiO2 nanoparticles (PHC/Ca2+/SiO2 NPs) conductive hydrogels. Owing to the stable chemical and physical hybrid crosslinking networks and reversible non-covalent interactions, the PHC/Ca2+/SiO2 NPs conductive hydrogel showed good conductivity (~3.39 S/m), excellent toughness (6.71 MJ/m3), high stretchability (2256%), fast self-recovery (80% within 10 s, and 100% within 30 s), and good fatigue resistance. The maximum gauge factor as high as 66.99 was obtained, with a wide detectable strain range (from 0.25% to 500% strain), the fast response (25.00 ms) and recovery time (86.12 ms), excellent negligible response hysteresis, and good response stability. The applications of monitoring the human’s body movements were demonstrated, such as wrist bending and pulse tracking.

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Anti-freezing, resilient and tough hydrogels for sensitive and large-range strain and pressure sensors

Cited by 268 publications

References 37 publications

Polyhedral Oligomeric Silsesquioxanes (POSS)‐based Hybrid Materials: Molecular Design, Solution Self‐Assembly and Biomedical Applications

Polyhedral Oligomeric Silsesquioxanes (POSS)‐based Hybrid Materials: Molecular Design, Solution Self‐Assembly and Biomedical Applications

Tendon-inspired anti-freezing tough gels

Robust Conductive Hydrogels with Ultrafast Self-Recovery and Nearly Zero Response Hysteresis for Epidermal Sensors

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