Статья

Molecular mechanism of abnormally large nonsoftening deformation in a tough hydrogel

Ya Nan YeGlobal Institution for Collaborative Research and Education, Hokkaido University, 001-0021 Sapporo, Japan;Kunpeng CuiInstitute for Chemical Reaction Design and Discovery, Hokkaido University, 001-0021 Sapporo, Japan;Wei HongDepartment of Mechanics and Aerospace Engineering, Southern University of Science and Technology, 518055 Shenzhen, Guangdong, China;Xueyu LiGlobal Institution for Collaborative Research and Education, Hokkaido University, 001-0021 Sapporo, Japan;Chengtao YuGraduate School of Life Science, Hokkaido University, 001-0021 Sapporo, Japan;Dominique HourdetGlobal Institution for Collaborative Research and Education, Hokkaido University, 001-0021 Sapporo, Japan;Tasuku NakajimaFaculty of Advanced Life Science, Hokkaido University, 001-0021 Sapporo, JapanTakayuki KurokawaFaculty of Advanced Life Science, Hokkaido University, 001-0021 Sapporo, JapanJian Ping GongFaculty of Advanced Life Science, Hokkaido University, 001-0021 Sapporo, Japan

2021en

ABI

Аннотация

Tough soft materials usually show strain softening and inelastic deformation. Here, we study the molecular mechanism of abnormally large nonsoftening, quasi-linear but inelastic deformation in tough hydrogels made of hyperconnective physical network and linear polymers as molecular glues to the network. The interplay of hyperconnectivity of network and effective load transfer by molecular glues prevents stress concentration, which is revealed by an affine deformation of the network to the bulk deformation up to sample failure. The suppression of local stress concentration and strain amplification plays a key role in avoiding necking or strain softening and endows the gels with a unique large nonsoftening, quasi-linear but inelastic deformation.

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Идентификаторы

DOI: 10.1073/pnas.2014694118

Цитирования и источники

Цитирований: 2Использованных источников: 0

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