2019 Fiscal Year Research-status Report
atigue behavior and underlying mechanism of tough and self-healing hydrogels
| Project/Area Number |
19K23617
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| Research Institution | Hokkaido University |
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Principal Investigator |
崔 昆朋 北海道大学, 化学反応創成研究拠点, 特任助教 (30843198)
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| Project Period (FY) |
2019-08-30 – 2021-03-31
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| Keywords | fatigue resistance / hydrogels / tough / self-healing |
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| Outline of Annual Research Achievements |
In the past year, we studied the fatigue behavior of tough and self-healing polyampholyte hydrogels (PA gel) and used small-angle x-ray scattering to record the structure evolution during fatigue loading. We demonstrated that PA gel has a high fatigue resistance, which is achieved through a synergistic effect between different scales. We think the understanding on fatigue mechanism in this work is important for the future application of PA gels and such an anti-fatigue mechanism also provides a design strategy for tough and fatigue-resistant hydrogels, by forming multiscale network structures using noncovalent bonds as building blocks. In addition, this work also gives important hints to understand fatigue-resistant behavior of biotissues with complex hierarchical structures.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
The relatively fast progress is due to the following three reasons.
1) We have prepared the PA gels in advance.
2) We have a specific device for fatigue test of PA gels.
3) We applied the synchrotron radiation beam time in advance.
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| Strategy for Future Research Activity |
We have studied the structure evolution in the length scale of phase separation structure of PA gels during cyclic loading. In the following year, we will focus on the structure evolution in chain scale and micro scale. We will use mechanical chemistry method to detect chain fracture and particle tracking method measure the local deformation at crack tip.
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| Causes of Carryover |
Our lab still had some storage of chemicals for synthesizing PA hydrogels before. So we did not spend money to buy chemicals in the past year. In addition, some meetings were cancelled due to the new coronavirus (COVID-19). In this year, more chemicals needs to be brought. Also, in this year, trips on meeting and experiments are also expected to spend the money incurring in the last year.
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