2015 Fiscal Year Final Research Report
Development of natural pigment-based photochromic material by a composite of anthocyanin and mesoporous material
| Project/Area Number |
25410213
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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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| Research Field |
Organic and hybrid materials
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| Research Institution | Tokyo University of Technology |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | フォトクロミック材料 / アントシアニン / 3－デオキシアントシアニジン / ルテオリニジン / 光着消色 / 多孔質シリカ / メソポーラスシリカ |
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| Outline of Final Research Achievements |
Aiming to develop non-toxic and safe photochromic pigments for food, toys and cosmetics, we have studied composites of plant extract pigments and nontoxic cosmetic/ food ingredients.
3-deoxy-anthocyanidins which are classified to anthocyanin pigments are isolated and purified from edible sorghum by using HPLC and were dissolved in a mixed solvent of butylene glycol and aqueous citric acid. This solution exhibited photochromic properties; it became vivid red by UV-A irradiation and discolored under light-shielding condition.
When the dye solution was absorbed into the pores of porous silica particle, the obtained powder exhibiting a photochromic behavior under high humidity conditions.
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| Free Research Field |
コロイド界面化学
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