Understanding the Mechanism of Flower Petal Transparency Change and Their Applications for Biomimetics
| Project/Area Number |
19K05620
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 35020:Polymer materials-related
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| Research Institution | Chitose Institute of Science and Technology |
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Principal Investigator |
Karthaus Olaf 公立千歳科学技術大学, 理工学部, 教授 (80261353)
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| Co-Investigator(Kenkyū-buntansha) |
谷尾 宣久 公立千歳科学技術大学, 理工学部, 教授 (50217121)
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| Project Period (FY) |
2019-04-01 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | fluoropolymer / phase change / micropores / films / biomimetics / flower petals / SEM / EDS / inorganic salt / flower petal / transparency / porous films / petals / leaves / PVDF copolymer / refractive index / microstructure / polymer films / phase separation |
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| Outline of Research at the Start |
The purpose of this research is the elucidation of the mechanisms by which flower petals turn transparent upon becoming wet. The petal microstructure most likely has air-filled voids that will be imaged by electron microscopy and a biomimetic version of the void structure will be prepared in polymer films. This process can be useful for the formation of reversibly transparent polymer films.
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| Outline of Annual Research Achievements |
The transpareny change of flower petals has been successfully implemented in a biomimetic manner in porous thin films of a fluorinated polymer. The mechanism of the transparency change in the flower was elucidated using SEM and fluorecence micrsocopy. Air-filled spaces in the leaves can be filled with water, leading to the transparent state. Using a solvent exchange process in which a spin coated film of a solution of a fluorinated polymer was immersed in a non-solvent, porous polymer films were produced that show the same white-to-transparent optical change, which is completely reversible.
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Report
(5 results)
Research Products
(15 results)
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[Presentation] Floral Biomimetics2023
Author(s)
Olaf Karthaus, Shinpei Otaki, Shion Sasaki, Yoshihiko Omura, Thomas Berberich
Organizer
Korea-Japan Joint Forum
Related Report
Int'l Joint Research
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[Presentation] Unusual biomaterials for environmentally friendly applications2022
Author(s)
Olaf Karthaus, Shinon Takahashi, Takumi Arakawa, Shinpei Otaki, Norihisa Tanio, Masahiro Kawahara, Thomas Berberich, Shion Sasaki, Kazuhiro Dainaka, Hayate Sato, Chiharu Ueno, Sho Shibamura, Tomomi Matsumura, Masahiro Kashiwao, Katja Drerup, Yoshihiko Omura
Organizer
International Workshop on Advanced Engineering Materials
Related Report
Int'l Joint Research / Invited
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