Tough hydrogels with tunable soft and wet interfacial adhesion

Zhang, Yikun; Xue, Jinbo; Li, Dapeng; Li, Haiyan; Huang, Zihan; Huang, Yiwan; Gong, Chunjie; Long, Shijun; Li, Xuefeng

doi:10.1016/j.polymertesting.2020.106976

Cited by 21 publications

(15 citation statements)

References 23 publications

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“…Even though the underlying physics governing each microscopic source to viscoelastic behavior is different, we expect the expression of the timescale for each phenomenon at the macroscale to be similar. With this caveat, a number of physical networks (whose primary source of viscoelasticity is due to bond dynamics) have been shown to exhibit similar behaviors to that predicted by the model. , For instance, the trends observed by Ding et al for an ionic polymer network match the qualitative predictions of the model (Figure b). We particularly note the distinct discontinuity observed between each loading cycle, which is commonly observed in viscoelastic polymers, but is not captured by many existing models.…”

Section: Resultsmentioning

confidence: 78%

Rate-Dependent Damage Mechanics of Polymer Networks with Reversible Bonds

et al. 2021

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Dynamic polymer networks utilize weak bonding interactions to dissipate the stored energy and provide a source of self-healing for the material. Due to this, tracking the progression of damage in these networks is poorly understood as it becomes necessary to distinguish between reversible and irreversible bond detachment (by kinetic bond exchange or chain rupture, respectively). In this work, we present a statistical formulation based on the transient network theory to track the chain conformation space of a dynamic polymer network whose chains rupture after being pulled past a critical stretch. We explain the predictions of this model by the observable material timescales of relaxation and self-healing, which are related to the kinetic rates of attachment and detachment. We demonstrate our model to match experimental data of cyclic loading and self-healing experiments, providing physical interpretation for these complex behaviors in dynamic polymer networks.

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Section: Resultsmentioning

confidence: 78%

Rate-Dependent Damage Mechanics of Polymer Networks with Reversible Bonds

et al. 2021

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“…Figure c,d shows the evaluation of the adhesive force of asymmetry characteristics through the peel test on the skin of the prepared film. The adhesion energy was defined as F ave /w and calculated from the adhesion–displacement curve . The adhesion energy of the upper surface was 40 J/m 2 and that of the lower surface was approximately 4 J/m 2 ; thus, demonstrating strongly asymmetric adhesion.…”

Section: Resultsmentioning

confidence: 99%

“…The adhesion energy was defined as F ave /w and calculated from the adhesion−displacement curve. 36 The adhesion energy of the upper surface was 40 J/m 2 and that of the lower surface was approximately 4 J/m 2 ; thus, demonstrating strongly asymmetric adhesion. Moreover, HA-based elastomers were created to be soft, with asymmetric adhesion, without changing the processing protocol in a major way.…”

Section: Optimization Of the Casting Solution Compositionmentioning

confidence: 90%

Functional Asymmetry-Enabled Self-Adhesive Film via Phase Separation of Binary Polymer Mixtures for Soft Bio-Integrated Electronics

et al. 2022

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Biocompatible adhesive films are important for many applications (e.g., wearable devices, implantable devices, and attachable sensors). In particular, achieving self-adhesion on one side of a film with biocompatible materials is a compelling goal in adhesion science. Herein, we report a simple and easy manufacturing process using water-soluble hyaluronic acid (HA) that allows adhesiveness on only one side using binary polymer mixtures based on a phase-separation strategy with an elastomer. HA influx allows for the entangled polymer chains of the elastomer to spontaneously deform, permitting tunable mechanical elasticity, conformability, and adhesion. The proposed adhesive film enables the transfer of nanopatterning and the attachment of various surfaces without the use of additional chemicals. In addition, the film can be used for measuring epidermal biopotential and for skin fixation of drug devices. Therefore, the developed facile asymmetric adhesion can block the interferences of other materials on the unnecessary adhesion side, providing considerable potential for the development of functional, multifunctional, and smart bioadhesives.

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“…The measured interfacial toughness was ~3,900 J/m 2 (Fig. 6(f)), which is much higher than that of the tendon-bone, cartilage-bone interface [43,44], and most hydrogel-substrate interfaces [16,19,35,36,[45][46][47][48].…”

Section: Evaluation Of Binding Performance Between Hydrogel Layer And...mentioning

confidence: 90%

Cartilage-bone inspired the construction of soft-hard composite material with excellent interfacial binding performance and low friction for artificial joints

et al. 2022

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Inspired by the cartilage-bone structure in natural joints, soft-hard integrated materials have received extensive attention, which are the most promising candidates for artificial joints due to their combination of excellent load-bearing properties and lubricating properties. The latest progress showed that the combination of hydrogel and titanium alloy can realize a bionic natural joint lubrication system on the surface of titanium alloy. However, obtaining a tough interface between the hydrogel (soft and wet) and the titanium substrate (hard and dry) is still a great challenge. Here, we designed a “soft (hydrogel)-hard (Ti6Al4V)” integrated material with outstanding combination, which simulates the structure and function of cartilage-bone in the natural joint. The load-bearing properties, binding performance, and tribological behaviors for different forms of the soft-hard integrated materials were investigated. The results showed that the hydrogel layer and Ti6Al4V substrate possess ultra-high interfacial toughness (3,900 J/m2). In addition, the combination of the hydrogel layer and Ti6Al4V substrate provided a good lubrication system to endow the “soft (hydrogel)-hard (Ti6Al4V)” integrated material with high load-bearing and excellent tribological properties. Therefore, this study provided an effective strategy for prolonging the service life of Ti6Al4V in the biomedical field.

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Tough hydrogels with tunable soft and wet interfacial adhesion

Cited by 21 publications

References 23 publications

Rate-Dependent Damage Mechanics of Polymer Networks with Reversible Bonds

Rate-Dependent Damage Mechanics of Polymer Networks with Reversible Bonds

Functional Asymmetry-Enabled Self-Adhesive Film via Phase Separation of Binary Polymer Mixtures for Soft Bio-Integrated Electronics

Cartilage-bone inspired the construction of soft-hard composite material with excellent interfacial binding performance and low friction for artificial joints

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