2020 Fiscal Year Annual Research 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 | Tough and self-healing / hydrogels / fatigue resistance / phase contrast |
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| Outline of Annual Research Achievements |
In the past year, we studied the effect of phase contrast on the fatigue behavior of tough and self-healing polyampholyte (PA) hydrogels. We found that with a strong phase contrast, the stress singularity around the crack tip is gradually eliminated with the fatigue cycle, suppressing the fast crack growth; while stress concentration always exists in weak phase contrast samples, resulting in weak fatigue-resistance. The clarified role of mesoscale structure on fatigue resistance provides design principles for developing self-healing, tough, and fatigue resistant soft materials. In addition, we also used hydrogels to achieve dynamic memories with spontaneous but learning-strength-dependent forgetting ability by using nonequilibrium structure transformation, in analogy to the human brain.
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Research Products
(10 results)
