Highly stretchable, self-healing elastomer hydrogel with universal adhesion driven by reversible cross-links and protein enhancement

Lei, Kun; Chen, Meijun; Wang, Xinling; Gao, Jingpi; Zhang, Jianbo; Li, Guangda; Bao, Jianfeng; Li, Zhao; Li, Jinghua

doi:10.1039/d2tb02015g

Cited by 11 publications

(8 citation statements)

References 49 publications

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“…The hysteresis area and hysteresis ratio of the loading−unloading cycles showed an increase in the number of stretches. 34 The findings indicate that the application of greater strain leads to the rupture of a greater number of noncovalent intermolecular connections within the hydrogel network, thus resulting in enhanced dissipation of energy and greater structural alterations. Furthermore, there was no apparent loss of tensile and compressive properties due to the antiswelling capacity of the Janus hydrogel, as shown in Figure S10e,f.…”

Section: ■ Results and Discussionmentioning

confidence: 95%

Janus Hydrogel with Both Sticky Adhesion and Slippery Antifouling Properties for Strain Sensing

Xu,

Wang,

et al. 2024

ACS Appl. Polym. Mater.

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Conductive hydrogels with self-adhesive property have received increasing attention in the fields of human−computer interaction, smart wearable devices, and soft electronic materials; however, they are easily contaminated by oil due to their sticky property, which will degrade their appearance and performance in daily use and make it difficult to be used in the complex oily water environment. Herein, a type of Janus TA@PVA/PSBMA hydrogel with slippery oil repellency and sticky adhesion is prepared by partially compounding the PVA/PSBMA hydrogel with tannic acid (TA) molecules through a unilateral soaking method. The upper PVA/PSBMA hydrogel layer in the Janus hydrogel exhibits excellent antioil fouling capability in air, underwater, and even under oil environments, because of the strong water affinity of the zwitterionic PSBMA chains. Interestingly, the bottom TA@PVA/PSBMA hydrogel layer can adhere to various substrates with bonding strength through active interactions between the TA molecules and the substrates. Exploiting its conductive, antifouling, and selfadhesive properties, the obtained Janus TA@PVA/PSBMA hydrogel is demonstrated as a strain sensor that can stably monitor large and subtle body movements in air, underwater, and oily wastewater. This work is expected to present a material for reliable sensing in complex environments.

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Section: ■ Results and Discussionmentioning

confidence: 95%

Janus Hydrogel with Both Sticky Adhesion and Slippery Antifouling Properties for Strain Sensing

Xu,

Wang,

et al. 2024

ACS Appl. Polym. Mater.

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“…Hence, in order to widen and facilitate application ranges of hydrogels in high‐tech fields, it is highly requisite to design the hydrogels that are adaptable to certain extreme mechanical environments, such as impact, large deformation, cyclic loading etc., thus retaining their structural integrity and mechanical properties, and the special hydrogels are defined as mechanical environment‐adaptive hydrogels (MEAHs). Considerable researches have been performed to enhance mechanical strengths and fracture toughness of hydrogels over the past few decades ( Figure ), such as double‐network hydrogels (DNHs) (Figure 11a), [ 104 ] topological hydrogels (THs) (Figure 11)b, [ 105 ] nanocomposite hydrogels (NCHs) (Figure 11c), [ 106 ] microsphere‐crosslinked hydrogels (MSCHs) (Figure 11d), [ 107 ] hybrid physically and chemically crosslinked‐hydrogels (HPCHs) (Figure 11e), [ 108 ] interpenetrating network hydrogels (IPNHs) (Figure 11f), [ 109 ] and fiber‐reinforced hydrogels (FRHs) (Figure 11g), [ 110 ] etc. Many review articles have summarized the advance of different kinds of tough hydrogels.…”

Section: Fabrication Methods Of Extremely Environment Adaptive Hydrogelsmentioning

confidence: 99%

“…Reproduced with permission, [ 107 ] Copyright 2017, Elsevier Ltd. e) Hybrid physically and chemically crosslinked hydrogel. Reproduced with permission, [ 108 ] Copyright 2022, American Chemical Society. f) Interpenetrating and semi‐interpenetrating network hydrogels.…”

Section: Fabrication Methods Of Extremely Environment Adaptive Hydrogelsmentioning

confidence: 99%

Environmentally Adaptive Polymer Hydrogels: Maintaining Wet‐Soft Features in Extreme Conditions

Lei

Chen

Guo

et al. 2023

Adv Funct Materials

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Hydrogels have been widely explored to adapt to different application circumstances. As typical wet‐soft materials, the high‐water content of hydrogels is beneficial to their wide biomedical applications. Moreover, hydrogels have been displaying considerable application potential in some high‐tech areas, like brain‐computer interface, intelligent actuator, flexible sensor, etc. However, traditional hydrogel is susceptive to freezing below zero, dehydration, performance swelling‐induced deformation, and suffers from mechanical damage in extremely mechanical environments, which result in the loss of wet‐soft peculiarities (e.g., flexibility, structure integrity, transparency), greatly limiting their applications. Therefore, reducing the freezing point, improving the dehydration/solution resistance, and designing mechanical adaptability are effective strategies to endow hydrogels with the extreme environmental adaptability, thus broadening their application fields. This review systematically summarizes research advances of environmentally adaptive hydrogels (EAHs), comprising anti‐freezing, dehydration‐resistant, acid/base/swelling deformation‐resistant, and mechanical environment adaptive hydrogels (MEAHs). Firstly, fabrication methods are presented, including the deep eutectic solvent/ionic liquid substituent, the addition of salts, organogel, polymer network modification, and double network (DN) complex/nanocomposite strategy, etc. Meanwhile, the features of different approaches are overviewed. The mechanisms, properties, and applications (e.g., intelligent actuator, wound dressing, flexible sensor) of EAHs are demonstrated. Finally, the issues and future perspectives for EAHs’ researches are demonstrated.

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“…25 Lei and others introduced borax and poly- N -(2-hydroxyethyl)acrylamide adjacent hydroxyl group formed skin-like hydrogels. 113 This skin-like hydrogels introduced both reversible nan-covalent interactions and dynamic covalent bonds. It not only endowed the self-healing ability of skin-like hydrogel, but also greatly improved the mechanical properties of skin-like hydrogel.…”

Section: Design Strategy and Mechanism Of Skin-like Hydrogelmentioning

confidence: 99%

Skin-like hydrogels: design strategy and mechanism, properties, and sensing applications

Wang

Zhao

et al. 2023

J. Mater. Chem. C

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Highly stretchable, self-healing elastomer hydrogel with universal adhesion driven by reversible cross-links and protein enhancement

Abstract: Engineered hydrogels with excellent mechanical properties and multi-functionality have great potential as soft electronic skins, tissue substitutes and flexible robotic joints. However, it has been a challenge to construct multifunctional...

Cited by 11 publications

References 49 publications

Janus Hydrogel with Both Sticky Adhesion and Slippery Antifouling Properties for Strain Sensing

Janus Hydrogel with Both Sticky Adhesion and Slippery Antifouling Properties for Strain Sensing

Environmentally Adaptive Polymer Hydrogels: Maintaining Wet‐Soft Features in Extreme Conditions

Skin-like hydrogels: design strategy and mechanism, properties, and sensing applications

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