A highly tough and stiff supramolecular polymer double network hydrogel

Li, Haofei; Wang, Hongbo; Zhang, Dongfei; Xu, Ziyang; Liu, Wenguang

doi:10.1016/j.polymer.2018.08.029

Cited by 75 publications

(66 citation statements)

References 35 publications

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“…It is worth noting that all of the hydrogels maintain their shapes without any macroscopic destruction even when subjected to so many consecutive compressions, benefiting from the sacrificial behavior of the physical bonds to absorb external energy. This is consistent with the case of other noncovalent crosslinking systems . Additionally, the strengths of the hydrogels in this work range from 0.2 to 1.1 MPa after 20 successive cycles, which still display enhanced strength in contrast to chemically crosslinked PAM hydrogels (compressive stress to failure: 110 ± 6 kPa) …”

Section: Resultssupporting

confidence: 89%

Zr(IV)‐Crosslinked Polyacrylamide/Polyanionic Cellulose Composite Hydrogels with High Strength and Unique Acid Resistance

Dai

Wang

Teng

et al. 2019

J Polym Sci B Polym Phys

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Recently, metal coordination has been widely utilized to fabricate high-performance hydrogels, but conventional metalbased hydrogels face some drawbacks, such as staining or acid lability. In the present study, a novel kind of colorless Zr(IV)crosslinked polyacrylamide/polyanionic cellulose (PAM/PAC) composite hydrogel with unique acid resistance was constructed via acrylamide polymerization in a PAC solution, followed by posttreatment in a zirconium oxychloride (ZrOCl 2 ) solution. The prepared gels were characterized in terms of Fourier transform infrared spectroscopy, scanning electron microscopy, and tensile and compressive mechanics, as well as acid resistance. Inside the gels, the synergistic action of hydrogen bonding and Zr(IV) coordination is responsible for their improved mechanical properties and good energy dissipation ability. One hydrogel with nearly 90 wt % of water content can sustain approximately 5 MPa of compression stress at 90% strain without damage. Both microscopic network structures and macroscopic mechanics demonstrate facile adjustability via changing the PAC dosages in polymerization and/or ZrOCl 2 concentrations in posttreatment. Moreover, the gels present unexpected acid resistance due to the strong Zr(IV) coordination with PAC, demonstrating their potential application as hydrogel electrolytes in supercapacitors. The current work provides a new approach to fabricate metal coordination-based high strength, colorless hydrogels with acid resistance.

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Section: Resultssupporting

confidence: 89%

Zr(IV)‐Crosslinked Polyacrylamide/Polyanionic Cellulose Composite Hydrogels with High Strength and Unique Acid Resistance

Dai

Wang

Teng

et al. 2019

J Polym Sci B Polym Phys

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“…In addition to trivalent ions, tetravalent ions, such as Ce 4+ , were also utilized to form dynamic self‐healing PAA hydrogel . Combination of two physical interactions such as hydrogen bonding and carboxylate•Fe 3+ coordination bonding was also demonstrated as a useful strategy to prepare the self‐healing hydrogel with enhanced mechanical strength, toughness, and time‐dependent self‐recovery capability …”

Section: Chelating Ligands In the Design Of Self‐healing Hydrogel Netmentioning

confidence: 99%

Self‐Healing Polymeric Hydrogel Formed by Metal–Ligand Coordination Assembly: Design, Fabrication, and Biomedical Applications

Shi

Ding

Wang

et al. 2019

Macromol. Rapid Commun.

226

150

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Self‐healing hydrogels based on metal–ligand coordination chemistry provide new and exciting properties that improve injectability, rheological behaviors, and even biological functionalities. The inherent reversibility of coordination bonds improves on the covalent cross‐linking employed previously, allowing for the preparation of completely self‐healing hydrogels. In this article, recent advances in the development of this class of hydrogels are summarized and their applications in biology and medicine are discussed. Various chelating ligands such as bisphosphonate, catechol, histidine, thiolate, carboxylate, pyridines (including bipyridine and terpyridine), and iminodiacetate conjugated onto polymeric backbones, as well as the chelated metal ions and metal ions containing inorganic particles, which are used to form dynamic networks, are highlighted. This article provides general ideas and methods for the design of self‐healing hydrogel biomaterials based on coordination chemistry.

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“…Especially, the DN hydrogels consisted of two asymmetric polymer networks, have demonstrated to be able to effectively reinforce the hydrogels and dissipate the energy during deformation. [ 8,30–33 ] However, the self‐healing capacity of conventional DN hydrogels was usually sacrificed. [ 8,10,31,34 ] In sum, to expand application scopes of hydrogels, it is imperative to explore a simple and efficient strategy to develop intrinsic self‐healing hydrogels while simultaneously achieving good mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

“…In this study, we designed a facile but effective approach to balance the tradeoff between strength and healability of self‐healing hydrogels via synergistic integration of dynamic covalent bonds and hydrogen bonds within DN hydrogel matrix. As shown in Scheme , the photo‐initiator IRGACURE 1173 and a special monomer ( N ‐acryloyl glycinamide (NAGA)) with demonstrated capability of forming the strong intra/intermolecular multiple hydrogen‐bonding interactions [ 30,35,36 ] were dissolved and dispersed in polyvinyl alcohol (PVA)‐borax slime. As a widely used polyhydroxy hydrogel material, PVA can be crosslinked by borax to obtain PVA‐borax slime with high self‐healing capacity, due to the formation of interchain dynamic diol‐borax complexations [ 22,26,37,38 ] The PVA‐borax slime, as one of the most widely studied self‐healing hydrogel systems, has extremely weak mechanical properties and very low stability.…”

Section: Introductionmentioning

confidence: 99%

A Facile Strategy for Synergistic Integration of Dynamic Covalent Bonds and Hydrogen Bonds to Surmount the Tradeoff between Mechanical Property and Self‐Healing Capacity of Hydrogels

Yang

et al. 2020

Macro Materials & Eng

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The self‐healable hydrogels have attracted increasing attention due to their promising potential for ensuring the durability and reliability of hydrogels. However, they still face a serious challenge to achieve a positive balance between mechanical and healing performance, especially for the room‐temperature autonomous self‐healable hydrogels. Herein, a simple but efficient strategy to fabricate a kind of dynamic boronate and hydrogen bonds dual‐crosslinked double network (DN) hydrogel based on a UV‐initiated one‐pot in situ polymerization of N‐acryloyl glycinamide (NAGA) in polyvinyl alcohol‐borax slime is reported. The obtained PN‐x/PB hydrogels, especially with high content of PNAGA, are shown to possess high mechanical strength, high toughness, and fatigue‐resistance properties as well as excellent self‐healability at room temperature (nearly 88% self‐healing efficiency based on the strain compression test), due to the dynamic DN structure, and the combination of the adaptable and reconfigurable dynamic boronate bonds and hydrogen bonds. Considering the easily available materials and simple preparation process, this novel strategy should offer not only a kind of dynamic DN hydrogel with robust mechanical performance and high self‐healing capability, but also enrich the methodological toolbox for synergistic integration of dynamic covalent bonds and hydrogen bonds to surmount the tradeoff between mechanical properties and self‐healing capacity of hydrogels.

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A highly tough and stiff supramolecular polymer double network hydrogel

Cited by 75 publications

References 35 publications

Zr(IV)‐Crosslinked Polyacrylamide/Polyanionic Cellulose Composite Hydrogels with High Strength and Unique Acid Resistance

Zr(IV)‐Crosslinked Polyacrylamide/Polyanionic Cellulose Composite Hydrogels with High Strength and Unique Acid Resistance

Self‐Healing Polymeric Hydrogel Formed by Metal–Ligand Coordination Assembly: Design, Fabrication, and Biomedical Applications

A Facile Strategy for Synergistic Integration of Dynamic Covalent Bonds and Hydrogen Bonds to Surmount the Tradeoff between Mechanical Property and Self‐Healing Capacity of Hydrogels

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