Crossover behavior in stress relaxations of poroelastic and viscoelastic dominant hydrogels
文献类型：期刊论文
| 作者 | 李航宇连欣怡; Guan DS(关东石) |
| 刊名 | SOFT MATTER
 |
| 出版日期 | 2023-06-19 |
| ISSN号 | 1744-683X |
| DOI | 10.1039/d3sm00592e |
| 英文摘要 | The mechanical response and relaxation behavior of hydrogels are crucial to their diverse functions and applications. However, understanding how stress relaxation depends on the material properties of hydrogels and accurately modeling relaxation behavior at multiple time scales remains a challenge for soft matter mechanics and soft material design. While a crossover phenomenon in stress relaxation has been observed in hydrogels, living cells, and tissues, little is known about how the crossover behavior and characteristic crossover time depend on material properties. In this study, we conducted systematic atomic-force-microscopy (AFM) measurements of stress relaxation in agarose hydrogels with varying types, indentation depths, and concentrations. Our findings show that the stress relaxation of these hydrogels features a crossover from short-time poroelastic relaxation to long-time power-law viscoelastic relaxation at the micron scale. The crossover time for a poroelastic-dominant hydrogel is determined by the length scale of the contact and diffusion coefficient of the solvent inside the gel network. In contrast, for a viscoelastic-dominant hydrogel, the crossover time is closely related to the shortest relaxation time of the disordered network. We also compared the stress relaxation and crossover behavior of hydrogels with those of living cells and tissues. Our experimental results provide insights into the dependence of crossover time on poroelastic and viscoelastic properties and demonstrate that hydrogels can serve as model systems for studying a wide range of mechanical behaviors and emergent properties in biomaterials, living cells, and tissues. |
| 分类号 | 二类 |
| WOS研究方向 | Chemistry, Physical ; Materials Science, Multidisciplinary ; Physics, Multidisciplinary ; Polymer Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001017991200001 |
| 资助机构 | National Key Ramp ; D Program of China [2021YFA0719302] ; NSFC [11972351] |
| 其他责任者 | Guan, DS (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. ; Guan, DS (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China. |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/92434]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.{Li Hangyu, Lian Xinyi, Guan Dongshi} Chinese Acad Sci Inst Mech State Key Lab Nonlinear Mech Beijing 100190 Peoples R China 2.{Li Hangyu, Lian Xinyi, Guan Dongshi} Univ Chinese Acad Sci Sch Engn Sci Beijing 100049 Peoples R China |
| 推荐引用方式 GB/T 7714 | 李航宇连欣怡,Guan DS. Crossover behavior in stress relaxations of poroelastic and viscoelastic dominant hydrogels[J]. SOFT MATTER,2023. |
| APA | 李航宇连欣怡,&关东石.(2023).Crossover behavior in stress relaxations of poroelastic and viscoelastic dominant hydrogels.SOFT MATTER. |
| MLA | 李航宇连欣怡,et al."Crossover behavior in stress relaxations of poroelastic and viscoelastic dominant hydrogels".SOFT MATTER (2023). |
入库方式： OAI收割
来源：力学研究所
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