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Role of dynamic bonds on fatigue threshold of tough hydrogels.
Li, Xueyu; Gong, Jian Ping.
Afiliación
  • Li X; Faculty of Advanced Life Science, Hokkaido University, Sapporo 001-0021, Japan.
  • Gong JP; Faculty of Advanced Life Science, Hokkaido University, Sapporo 001-0021, Japan.
Proc Natl Acad Sci U S A ; 119(20): e2200678119, 2022 05 17.
Article en En | MEDLINE | ID: mdl-35549555
SignificanceDynamic 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 because the wide dynamic range of viscoelastic response imposes a challenge on fatigue experiments. Here, by using polyampholyte hydrogels, we adopted a time-salt superposition principle to access a wide range of time scales that are otherwise difficult to access in fatigue tests. Relations between fatigue threshold and strain rate in elastic and viscoelastic regimes and the corresponding mechanism correlated to permanent/dynamic bonds were revealed. We believe that this work gives important insight into the design and development of fatigue-resistant soft materials composed of dynamic bonds.
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Texto completo: 1 Banco de datos: MEDLINE Idioma: En Revista: Proc Natl Acad Sci U S A Año: 2022 Tipo del documento: Article País de afiliación: Japón

Texto completo: 1 Banco de datos: MEDLINE Idioma: En Revista: Proc Natl Acad Sci U S A Año: 2022 Tipo del documento: Article País de afiliación: Japón