| Project/Area Number |
17550182
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Inorganic industrial materials
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| Research Institution | Kumamoto Industrial Research Institute |
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Principal Investigator |
NAGATA Masanori Kumamoto Industrial Research Institute, Materials Development Department, Senior Scientist, 材料開発部, 研究主幹 (60399673)
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| Co-Investigator(Kenkyū-buntansha) |
NAGAOKA Shoji Kumamoto Industrial Research Institute, Materials Development Department, Senior Researcher, 材料開発部, 研究参事 (10227994)
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| Project Period (FY) |
2005 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2006: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2005: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | Photocatalyst / Cellulose / Pigment / Particle / Titanium Dioxide |
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| Research Abstract |
(1) Cellulose/inorganic material composite spherical microbeads for environmental composite pigment were made by a phase-separation method using viscose and an aqueous solution containing sodium polyacrylate.
We also report our findings regarding the relationships between cellulose xanthate and the electronic characteristics of TiO_2 particles used in the cellulose/inorganic material composite sphering process. These findings suggest that the location of TiO_2 particles in cellulose microbeads is related to electric repulsion between the CSS-group and Ti0_2. The distribution of TiO_2 particles onto composite spherical microbead surfaces was also evaluated by investigating the removal property of acetaldehyde gas. In addition, cellulose composite spherical microbeads covered with TiO_2 and Fe_2O_3 particles were developed by addition of Fe_2O_3. Their surfaces were observed by Laser microscope and SEM images. These ternary composite microbeads retained the photocatalytic property of TiO_2.
(2) In addition, we focused on the photocatalyst/long persistence phospher composite microbeads that was able to retain photocatalitic property. Especially, CaCO_3 utilized in sphering cellulose microbeads were hybridized with long persistence phospher and photocatalyst Ti02. CaCO_3 used for functional filler generally have aragonite structure. The aragonite structure is formed in aqueous solution. On the other hand, the long persistence phospher, rare-earth alminate phospher MAl_20_4 decomposed in aqueous solution. (These decomposed in cellulose derivative aqueous solution.) Therefore, the composition of CaCO_3 and long persistence phospher had to be carried out in non-aqueous solution. We could be prepared CaCO_3 aragonaite in ethanol solvent.
As results, we could prepare long persistence phospher/TiO_2/CaCO_3 aragonaite composite in ethanol solvent. These composite retained photocatalytic property and long persistence.
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