Construction of an ultrahigh strength hydrogel with excellent fatigue resistance based on strong dipole–dipole interaction

Bai, Tao; Zhang, Peng; Han, Yanjiao; Liu, Yuan; Liu, Wenguang; Zhao, Xiaoli; Lu, William W.

doi:10.1039/c0sm01108h

Cited by 114 publications

(83 citation statements)

References 35 publications

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“…Consequently, tough hydrogels are prone to degradation under cyclic loads. Examples include changes in elastic modulus [22], in hysteresis of stress-stretch curves [23,24], and in functional characteristics of devices [25]. Fatigue fracture of tough hydrogels, however, has remained unexplored.…”

Section: Introductionmentioning

confidence: 99%

Fatigue fracture of tough hydrogels

Bai

Yang

Tang

et al. 2017

Extreme Mechanics Letters

233

186

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Abstract:Tough hydrogels of many chemical compositions have been developed in recent years, but their fatigue fracture has not been studied. The lack of study hinders further development of hydrogels for applications that require long lifetimes under cyclic loads. Examples include tissue engineering, soft robots, and stretchable electronics. Here we study the fatigue fracture of a polyacrylamide-alginate tough hydrogel. We find that the stress-stretch curve changes cycle by cycle, and reaches a steady state after thousands of cycles. The threshold for fatigue fracture is about 53 J/m 2 , much below the fracture energy (~10,000 J/m 2 ) measured under monotonic load. Nonetheless, the extension of crack per cycle in the polyacrylamide-alginate tough hydrogel is much smaller than that in a single-network polyacrylamide hydrogel.

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Section: Introductionmentioning

confidence: 99%

Fatigue fracture of tough hydrogels

Bai

Yang

Tang

et al. 2017

Extreme Mechanics Letters

233

186

View full text Add to dashboard Cite

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“…However, the application of Col hydrogels remains challenging, especially in the regeneration and replacement of load-bearing tissues (such as cartilage, tendon, and muscle) because most Col hydrogels are single network (SN) hydrogels, which lack mechanical strength. 20 Numerous efforts have been attempted to address these issues, such as increasing the degree of crosslinking. However, these approaches are always accompanying by the loss of bioactivity.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of tough poly(ethylene glycol)/collagen double network hydrogels for tissue engineering

Chen

Yuan

et al. 2017

J Biomedical Materials Res

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In this study, a series of poly(ethylene glycol)/collagen (PEG/Col) double network (DN) hydrogel is fabricated from PEG and Col. Results of the compressive strength test indicate that the strength and toughness of these DN hydrogels are significantly enhanced. The fracture strength of PEG/ Col DN hydrogels increases by 9-to 12-fold compared with that of PEG single network (SN) hydrogel, and by 36-to 48-fold compared with that of Col SN hydrogel. Taking advantage of both PEG and Col building blocks, the PEG/Col DN hydrogels possess a strengthened skeleton. Moreover, the water-storage capability and favorable biocompatibility of Col are effectively maintained. Given that the DN hydrogels can provide the appropriate environment for the adhesion, growth, and proliferation of MC3T3-E1 cells, PEG/Col DN hydrogels have potential as a load-bearing tissue repair material.

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“…values with the AN content (x) for the C55(0)-x(1) films is shown in values with x is expected because AN segments are known to increase the T g value for copolymers 38 and contribute strong nitrile dipolar interactions between polymer chains 39 , which increase chain stiffness.…”

Section: The Variation Of the T G(s)mentioning

confidence: 99%

Tuning the modulus of nanostructured ionomer films of core–shell nanoparticles based on poly(n-butyl acrylate)

et al. 2016

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ABSTRACT:In this study we investigate the structure-mechanical property relationships for nanostructured ionomer films containing ionically crosslinked core-shell polymer nanoparticles based on poly(n-butyl acrylate) (PBA). Whilst nanostructured ionomer films of core-shell nanoparticles have been previously shown to have good ductility [Soft Matter, 10, 4725, 2014], the modulus values were modest. Here, we used BA as the primary monomer to construct core-shell nanoparticles that provided films containing nanostructured polymers with much higher glass transition temperature (T g ) values. The core-shell nanoparticles were synthesised using BA, acrylonitrile (AN), methacrylic acid (MAA) and 1, 4-butanediol diacrylate (BDDA). Nanostructured ionomer films were prepared by casting aqueous coreshell nanoparticle dispersions in which the shell -COOH groups were neutralised with KOH and ZnO. The film mechanical properties were studied using dynamic mechanical analysis and tensile stress-strain measurements. The use of BA-based nanoparticles increased the T g values to close to room temperature which caused a strong dependence of the film mechanical properties on the AN content and extent of neutralisation of the -COOH groups.The Young's modulus values for the films ranged from 1.0 to 86.0 MPa. The latter is the highest modulus reported for cast films of nanostructured ionomer films prepared from coreshell nanoparticles. The films had good ductility with strain-at-break values of at least 200%.The mechanical properties of the films were successfully modelled using the isostrain model.From comparison with an earlier butadiene-based system this study demonstrates that the 2 nature of the primary monomer used to construct the nanoparticles can profoundly change the film mechanical properties. The aqueous nanoparticle dispersion approach used here provides a simple and versatile method to prepare high modulus elastomer films with tuneable mechanical properties.

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Construction of an ultrahigh strength hydrogel with excellent fatigue resistance based on strong dipole–dipole interaction

Cited by 114 publications

References 35 publications

Fatigue fracture of tough hydrogels

Fatigue fracture of tough hydrogels

Fabrication of tough poly(ethylene glycol)/collagen double network hydrogels for tissue engineering

Tuning the modulus of nanostructured ionomer films of core–shell nanoparticles based on poly(n-butyl acrylate)

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