Weak Hydrogen Bonding Enables Hard, Strong, Tough, and Elastic Hydrogels

Hu, Xiaobo; Vatankhah‐Varnoosfaderani, Mohammad; Zhou, Jing; Li, Qiaoxi; Sheiko, Sergei S.

doi:10.1002/adma.201503724

Cited by 476 publications

(411 citation statements)

References 76 publications

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“…The DP‐hydrogel had the largest dissipated energy of 5.78 MJ m −3 , which was three times larger than that of dp‐hydrogel (1.36 MJ m −3 ), and the b‐hydrogel had the lowest dissipated energy of 8.6 kJ m −3 . Energy dissipation capability of the hydrogel depended on the strength and quantity of the reversible crosslinks in polymer network . When immersing b‐hydrogel in FeCl 3 solution, the introduction of ionic coordination bond led to formation of dual‐crosslinked structure and there were more reversible crosslinks in dp‐hydrogel network.…”

Section: Resultsmentioning

confidence: 99%

A Dual‐Crosslinked Strategy to Construct Physical Hydrogels with High Strength, Toughness, Good Mechanical Recoverability, and Shape‐Memory Ability

Qin

Niu

Tang

et al. 2017

Macro Materials & Eng

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A novel type of physical hydrogel based on dual‐crosslinked strategy is successfully synthesized by micellar copolymerization of stearyl methacrylate, acrylamide, and acrylic acid, and subsequent introduction of Fe3+. Strong hydrophobic associations among poly(stearyl methacrylate) blocks form the first crosslinking point and ionic coordination bonds between carboxyl groups and Fe3+ serve as the second crosslinking point. The mechanical properties of the hydrogel can be tuned in a wide range by controlling the densities of two crosslinks. The optimal hydrogel shows excellent mechanical properties (tensile strength of ≈6.8 MPa, elastic modulus of ≈8.0 MPa, elongation of ≈1000%, toughness of 53 MJ m−3) and good self‐recovery property. Furthermore, owing to stimuli responsiveness of physical interaction, this hydrogel also shows a triple shape memory effect. The combination of two different physical interactions in a single network provides a general strategy for designing of high‐strength hydrogels with functionalities.

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Section: Resultsmentioning

confidence: 99%

A Dual‐Crosslinked Strategy to Construct Physical Hydrogels with High Strength, Toughness, Good Mechanical Recoverability, and Shape‐Memory Ability

Qin

Niu

Tang

et al. 2017

Macro Materials & Eng

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“…The enhancement of hydrogen bonds by hydrophobic interaction was also applied in a very recent work by Sheiko and co-workers, to create stiff and tough hybrid hydrogels where the hydrogen bonds act as sacrifi cial bonds while the chemical cross-links maintain elasticity. [ 33 ] The large amount of hydrogen bonding effectively serves as sacrifi cial bonds to substantially increase the strength and toughness of the B-DN gel in comparison with the c-DN gel.…”

Section: Communicationmentioning

confidence: 99%

Tough Physical Double‐Network Hydrogels Based on Amphiphilic Triblock Copolymers

et al. 2016

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“…[22] The mechanical strength of the abovementioned strong hydrogels can be comparable with that of biological soft tissues. [23][24][25] Researchers have also focused on the highly ordered structures within hydrogels. Many biological soft tissues in nature, such as cartilage, skeletal muscles, corneas, and blood vessels, are natural hydrogel materials that exhibit anisotropic mechanical performances due to their highly ordered hierarchical nanocomposite structures.…”

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confidence: 99%

Bioinspired Nanocomposite Hydrogels with Highly Ordered Structures

et al. 2017

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In the human body, many soft tissues with hierarchically ordered composite structures, such as cartilage, skeletal muscle, the corneas, and blood vessels, exhibit highly anisotropic mechanical strength and functionality to adapt to complex environments. In artificial soft materials, hydrogels are analogous to these biological soft tissues due to their “soft and wet” properties, their biocompatibility, and their elastic performance. However, conventional hydrogel materials with unordered homogeneous structures inevitably lack high mechanical properties and anisotropic functional performances; thus, their further application is limited. Inspired by biological soft tissues with well‐ordered structures, researchers have increasingly investigated highly ordered nanocomposite hydrogels as functional biological engineering soft materials with unique mechanical, optical, and biological properties. These hydrogels incorporate long‐range ordered nanocomposite structures within hydrogel network matrixes. Here, the critical design criteria and the state‐of‐the‐art fabrication strategies of nanocomposite hydrogels with highly ordered structures are systemically reviewed. Then, recent progress in applications in the fields of soft actuators, tissue engineering, and sensors is highlighted. The future development and prospective application of highly ordered nanocomposite hydrogels are also discussed.

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Weak Hydrogen Bonding Enables Hard, Strong, Tough, and Elastic Hydrogels

Cited by 476 publications

References 76 publications

A Dual‐Crosslinked Strategy to Construct Physical Hydrogels with High Strength, Toughness, Good Mechanical Recoverability, and Shape‐Memory Ability

A Dual‐Crosslinked Strategy to Construct Physical Hydrogels with High Strength, Toughness, Good Mechanical Recoverability, and Shape‐Memory Ability

Tough Physical Double‐Network Hydrogels Based on Amphiphilic Triblock Copolymers

Bioinspired Nanocomposite Hydrogels with Highly Ordered Structures

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