| Project/Area Number |
19K23617
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Multi-year Fund |
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| Review Section |
0501:Physical chemistry, functional solid state chemistry, organic chemistry, polymers, organic materials, biomolecular chemistry, and related fields
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| Research Institution | Hokkaido University |
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Principal Investigator |
CUI KUNPENG 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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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | hydrogels / tough and self-healing / multiscale structure / fatigue resistance / Tough and self-healing / phase contrast / tough / self-healing / fatigue behavior / structure change |
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| Outline of Research at the Start |
This research will bring a fundamental understanding of mechanism of fatigue resistance of tough and self-healing hydrogels, which will be vital important for the design of next generation of fatigue-resistant gels and other network materials, as well as the theoretical development of soft matter.
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| Outline of Final Research Achievements |
Load-bearing biological tissues, such as muscles, are highly fatigue resistant, but how the exquisite hierarchical structures of biological tissues contribute to their excellent fatigue resistance is not well understood. In this project, we studied antifatigue properties of soft materials with hierarchical structures using polyampholyte hydrogels (PA gels) as a simple model system. PA gels are tough and self-healing, similar to biotissues. By combining fatigue measurement and time-resolved synchrotron radiation small-angle X-ray scattering we discovered that, upon fatigue cycling, the bicontinuous phase networks in PA gels form a transient oriented structure to induce a pronounced crack blunting and crack deceleration effect. We further revealed that the phase contrast between soft and hard phase is vital important for suppressing the fast crack growth. These findings provide design strategy for tough and fatigue-resistant materials.
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| Academic Significance and Societal Importance of the Research Achievements |
We revealed the antifatigue mechanism of tough and self-healing polyampholyte hydrogels, which not only give important hints to understand fatigue-resistant behavior of biotissues with complex hierarchical structures, but also provide design strategy for tough and fatigue-resistant hydrogels.
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