Mechanical behavior of hybrid hydrogels composed of a physical and a chemical network

Hao, Jinkun; Weiß, Robert

doi:10.1016/j.polymer.2013.01.052

Cited by 55 publications

(62 citation statements)

References 30 publications

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“…Importantly, the break position of the healed hydrogel in the tensile test is not the healing position (Figure F), indicating the perfect connection of cut surfaces by Fe 3+ ions. This self‐healing is realized by the PAA‐Fe 3+ cross‐linking and the whole as‐prepared hydrogel is also reinforced at the same time, which is different from that previously reported for PAA‐Fe 3+ hydrogels …”

Section: Resultscontrasting

confidence: 94%

Multiple Shape Memory, Self-Healable, and Supertough PAA-GO-Fe³⁺Hydrogel

Zhao

Huang

Wang

et al. 2016

Macromol. Mater. Eng.

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A multiple shape memory and self‐healing poly(acrylic acid)‐graphene oxide‐Fe3+ (PAA‐GO‐Fe3+) hydrogel with supertough strength is synthesized containing dual physically cross‐linked PAA network by GO and Fe3+. The first GO cross‐linked hydrogel can be reversibly reinforced by immersing in FeCl3/HCl and pure water and softened by immersing in HCl. The tensile strength is 2.5 MPa with the break strain of 700%. Multiple shape memory capability is found depending on this unique feature, the hydrogel can be fixed in four temporary shapes by adjusting the immersing time in FeCl3/HCl and pure water, and recovered in sequence by immersing in HCl. This hydrogel also exhibits perfect self‐healing behavior, the cut as‐prepared hydrogel is almost completely healed by immersing in FeCl3/HCl. Besides, the hydrogel shows enhanced electrical conductivity with the presence of GO and Fe3+. This supertough hydrogel provides a new way to design soft actuators.

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Section: Resultscontrasting

confidence: 94%

Multiple Shape Memory, Self-Healable, and Supertough PAA-GO-Fe³⁺Hydrogel

Zhao

Huang

Wang

et al. 2016

Macromol. Mater. Eng.

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“…The response of material to covalent crosslinking is frequently described in literature . The additive covalent crosslinking usually increases the toughness of material.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Mechanical Response of Hybrid Physical Covalent Networks − Molecular Dynamics Simulation

Žídek

Milchev

Jančář

et al. 2017

Macromolecular Symposia

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Summary In this article, we present two principal stimuli that affect the deformation response: additional covalent crosslinking and external deformation. Additional crosslinking leads to hybrid gels which show improved toughness in comparison to the physical gels. The article considers also the change of response of the model as a consequence of external mechanical loading. In this case, the structural changes driven by deformation induce permanent structural changes owing to extensive stretching analogous to filament drawing in spider silk or collagen. Almost identical atomistic configurations are transformed into various materials, depending on the stimulus and the conditions. The intensity of stimuli can be regulated also in real materials. The degree of covalent crosslinking can be regulated for example by ultraviolet irradiation. The permanent changes are observed only when the stretching ratio is sufficiently large and stretching is quick.

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“…One of the most important factors determining the properties and applications of a hydrogel is its water absorption characteristics. The swelling behavior of hydrogels is related to various parameters such as the equilibrium degree of swelling, the diffusion parameters and the cross-linker content [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization Studies of a Series of N-Vinyl Imidazole-Based Hydrogel

Erdem

2016

ANADOLU UNIVERSITY JOURNAL OF SCIENCE AND TECHNOLOGY a - Applied Sciences and Engineering

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In this study, poly[(N-vinyl imidazole)-co-(2-dimethylaminoethyl methacrylate)] hydrogels with various mole percentages of monomers were prepared by free radical solution polymerization in aqueous media. N,N'-methylenebisacrylamide and 2,2'-azobisisobutyronitrile were used as cross-linker and initiator, respectively. A Fourier transform infrared spectrophotometer, scanning electron microscope and thermogravimetric analyzer were used for the characterization of the hydrogels. The swelling behavior of the hydrogels in aqueous solution was investigated at pH 6.0 and 25°C. The results showed that swelling characteristics were affected by the 2-dimethylaminoethyl methacrylate content of the copolymeric hydrogel. The swelling degree of hydrogels increased from 4.2 g g -1 to 25.4 g g -1 by increasing the 2-dimethylaminoethyl methacrylate concentration from 0 to 15% with respect to the total moles of the monomers.

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Mechanical behavior of hybrid hydrogels composed of a physical and a chemical network

Cited by 55 publications

References 30 publications

Multiple Shape Memory, Self-Healable, and Supertough PAA-GO-Fe³⁺Hydrogel

Multiple Shape Memory, Self-Healable, and Supertough PAA-GO-Fe³⁺Hydrogel

Dynamic Mechanical Response of Hybrid Physical Covalent Networks − Molecular Dynamics Simulation

Synthesis and Characterization Studies of a Series of N-Vinyl Imidazole-Based Hydrogel

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Mechanical behavior of hybrid hydrogels composed of a physical and a chemical network

Cited by 55 publications

References 30 publications

Multiple Shape Memory, Self-Healable, and Supertough PAA-GO-Fe3+Hydrogel

Multiple Shape Memory, Self-Healable, and Supertough PAA-GO-Fe3+Hydrogel

Dynamic Mechanical Response of Hybrid Physical Covalent Networks − Molecular Dynamics Simulation

Synthesis and Characterization Studies of a Series of N-Vinyl Imidazole-Based Hydrogel

Contact Info

Product

Resources

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Multiple Shape Memory, Self-Healable, and Supertough PAA-GO-Fe³⁺Hydrogel

Multiple Shape Memory, Self-Healable, and Supertough PAA-GO-Fe³⁺Hydrogel