By crosslinking these fibres, the resulting hydrogels showed an unusual combination of high mechanical strength (fracture stress ~4.1 MPa), ultrahigh toughness (fracture energy ~25.3 kJ m−2), excellent fatigue resistance (fatigue threshold ~424 J m−2) and almost 100% mechanical...
Fatigue fracturePolyacrylamideRapid advances are taking place to develop hydrogels of high stretchability and toughness, but fatigue fracture has not been studied for any hydrogels. This negligence hinders the development of hydrogels and their applications. Here we initiate a study of fatigue fracture ...
Rapid advances are taking place to develop hydrogels of high stretchability and toughness, but fatigue fracture has not been studied for any hydrogels. This negligence hinders the development of hydrogels and their applications. Here we initiate a study of fatigue fracture of hydrogels. We choose pol...
hydrogels are still susceptible to fatigue fracture. We study a hydrogel containing both covalently cross-linked polyacrylamide and un-cross-linked poly(vinyl alcohol). For a sample without precut crack, the stress–stretch curve recovers after thousands of loading cycles. For a sample with a ...
Tough adhesions between hydrogels and engineering materials have been achieved by covalently anchoring polymer chains of tough hydrogels on solid surfaces (Supplementary Fig.1a)1. When the hydrogel is peeled from the solid under a single cycle of the mechanical load, the energy required for fracturin...
The emerging applications of hydrogels in devices and machines require these soft materials to maintain robustness under cyclic mechanical loads. Whereas hydrogels have been made tough to resist fracture under a single cycle of mechanical load, these toughened gels still suffer from fatigue fracture unde...
Aspects of the disclosure further relate to block copolymer hydrogels that exhibit both fatigue resistance and fracture resistance with superior rates of recovery. 机译:本公开涉及三嵌段和五嵌段和五嵌段共聚物及其制备方法。 本公开的各方面还涉及嵌段共聚物水凝胶,其表现出疲劳性抗性和抗骨折性的抗损伤率...
such as the fracture of short polymer chains and reversible crosslinks into stretchy polymer networks. Yet, the existing tough hydrogels suffer fromfatigue fractureunder multiple cycles of mechanical loads. The highest fatigue threshold on record so far is 418 J/m2for a double network hydrogel, poly...
Fracture, fatigue, and friction of polymers in which entanglements greatly outnumber cross-links 2021, Science Anisotropically Fatigue-Resistant Hydrogels 2021, Advanced Materials Soft Materials by Design: Unconventional Polymer Networks Give Extreme Properties 2021, Chemical Reviews Strong tough hydrogels via...
Hydrogels have been extensively studied for applications in various fields, such as tissue engineering and soft robotics, as determined by their mechanical