| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
The preparation conditions of poly(vinyl alcohol) gels using the freeze-thawing (FT) and the cast-drying (CD) methods were controlled precisely. It was confirmed that the breaking stress is well-correlated with the swelling ratio, and that the realization of both high water-absorbability and high mechanical strength is difficult prepared by conventional methods. Therefore, recently introduced preparation methods were studied here. Using a unidirectional freezing method, a micrometer scale fibril network structure was formed in the network of FT gels. In addition, a lamination method and hybrid techniques were examined. It was shown that higher mechanical performance was realized by the synergistic interaction between the gel layers. Higher water-absorbability and mechanical performance were realized in the anisotropic gels by controlling the size, number, and distribution of microcrystallites to form the controlled network structures in nano- and micro-scales.
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