Fatigue fracture of self-recovery hydrogels
WebJul 1, 2024 · The fracture toughness of the prepared physical hydrogels was measured by the pure shear test. Two samples with the identical rectangular geometry (width 50 mm and height H = 10 mm) were used: one sample did not contain a crack, and the other one was precut with a 20 mm one-edge crack by a cutter ( Fig. 2 a). WebApr 11, 2024 · The non-covalent interaction plays a vital role in the self-recovery and fatigue performance of the hydrogels at room temperature without any external stimuli. Moreover, the hydrogels possess ultra-sensitivity with a gauge factor (GF) of 12.8 at 400% strain and response and recovery time of 100ms and 80ms respectively, which allows …
Fatigue fracture of self-recovery hydrogels
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WebOct 31, 2024 · We show that, in a class of tough and self-healing polyampholyte hydrogels, a bicontinuous network structure, consisting of a hard network and a soft network, is formed, independently of the... WebFeb 16, 2024 · 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 …
WebThese hydrogels are called self-recovery hydrogels or even fatigue-free hydrogels. Such a hydrogel typically contains a covalent polymer network, together with some … WebJul 1, 2024 · Numerous mechanically strong synthetic hydrogels have been developed in recent years; however, few of them are both tough and resilient like living tissues such as muscles. The intrinsically contradictory requirements for toughness and resilience make it a big challenge to design a gel with both high toughness and high resilience.
WebThe rapid self-recovery ability of agarose/P(HEAA-co-AA)/Ca 2+ DN hydrogel was beneficial to DN hydrogel exhibiting better anti-fatigue performance than other hydrogels under the same conditions. As shown in Fig. 3 g, the anti-fatigue test of agarose/P(HEAA- co -AA)/Ca 2+ DN hydrogel was carried out at a blistering speed of 1000 mm min −1 ... WebAug 12, 2024 · High stretchability, low hysteresis and anti-fatigue fracture are essential for hydrogel-based devices but it is rare to achieve. Here the authors demonstrate a …
WebApr 7, 2024 · In this work, we study antifatigue properties of soft materials with hierarchical structures using polyampholyte hydrogels (PA gels) as a simple model system. PA gels …
WebOct 1, 2024 · In addition, good fatigue resistance and self-recovery performance are achieved for the hydrogel because of their supramolecular nature. Notably, the DN hydrogel display good self-healing property with recovered fracture stress and strain of 1.4 MPa and ∼700%, respectively. record ratures usWebJan 1, 2024 · To study the fatigue fracture of the DN hydrogels, we made a thin sheet of the same rectangular shape (10 mm × 50 mm), and cut a 20-mm crack using a razor blade. The cyclic loads with different maximum stretches λ MAX were applied to the cut samples. u of a geneticsWebOct 1, 2024 · Proceedings of the National Academy of Sciences of the United States of America 2024 Significance Dynamic bonds have been found to enhance fracture toughness of hydrogels as sacrificial bonds, but the role of dynamic bonds to fatigue threshold of hydrogels is poorly understood… Expand 3 PDF uofa gearWebApr 13, 2024 · Microcapsule-assisted extrinsic self-healing was first demonstrated in 2001 [37], and extrinsic self-healing mechanisms with diverse material architectures, SHAs, and polymerization methods have since been developed rapidly.SHAs can be classified in accordance with their organization within the polymeric host as phase-separated, latent … u of agderWebRecently, we found that tough and self-healing polyampholyte hydrogels (PA gels) with a hierarchical structure show a high fatigue resistance ().The hierarchical structure of PA … u of agers university of albertaWebMay 9, 2024 · Study of fatigue fracture of polyacrylamide hydrogels of various water contents finds the measured thresholds agree well with the predictions of the Lake-Thomas model for hydrogel of high water content, but not in the case of low water content. Polyacrylamide hydrogels are highly stretchable and nearly elastic. Their stress-stretch … record redecanaisWebMar 1, 2024 · A hydrogel under fatigue crack growth (either static or cyclic) exhibits a threshold and a toughness (fracture energy). The crack does not grow when the energy release rate is below the threshold, and grows rapidly when the energy release approaches the toughness. Fig. 1. Symptoms of fatigue. record recharge