Expanding the Non-Yielding Region of Tough and Strong Hydrogels

扩大坚韧水凝胶的非屈服区域

• 批准号: 21K14677
• 负责人: 崔 昆朋
• 金额: $ 3万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-04-01 至 2022-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21K14677/
• 关键词: tough hydrogels; non-yielding deformation; structure evolution; X-ray scattering

In the past year, we combined the small-angle X-ray scattering (SAXS) and the mechanical method to study the structure change of the tough and non-yielding hydrogels. Through SAXS, we obtained the network deformation in the scale of 50 nanometers. We found that the nanoscale deformaiton of gel is affine to the macroscopic deformation of bulk gel. Through mechanical chemistry method, we confirmed that the chain scission does not occur during deformation.We performed cyclic loading to check how energy dissipates during deformation. In addition, we checked the role of hyperconnectivity on the network deformation. Our current results suggest that the interplay between hyperconnectivity and stress transfer between two networks is important to the nonaffine deformation.

在过去的一年中，我们结合了小角度X射线散射（SAXS）和研究坚硬和非饲养水凝胶的结构变化的机械方法。通过SAXS，我们获得了50纳米尺度的网络变形。我们发现，凝胶的纳米级变形是散装凝胶的宏观变形的仿生。通过机械化学方法，我们确认在变形过程中不会发生链分裂。我们进行了循环载荷以检查变形过程中能量如何消散。此外，我们检查了超连接性在网络变形中的作用。我们目前的结果表明，两个网络之间的高连接性与应力转移之间的相互作用对于非承包变形很重要。

项目成果

How double dynamics affects the large deformation and fracture behaviors of soft materials

• DOI: 10.1122/8.0000438
• 发表时间: 2022-11-01
• 期刊: JOURNAL OF RHEOLOGY
• 影响因子: 3.3
• 作者: Cui, Kunpeng;Gong, Jian Ping
• 通讯作者: Gong, Jian Ping