1996 Fiscal Year Final Research Report Summary
Surface and Pore Structure of Monodispersed Inorganic Particles
| Project/Area Number |
06640747
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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 |
機能・物性・材料
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| Research Institution | Osaka Kyoiku University |
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Principal Investigator |
KANDORI Kazuhiko Osaka Kyoiku University, Education, Associ.Prof., 教育学部, 助教授 (70177765)
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| Co-Investigator(Kenkyū-buntansha) |
YASUKAWA Akemi Osaka Kyoiku University, Education, Stuff of school affairs, 教育学部, 教務職員 (70243285)
ISHIKAWA Tatsuo Osaka Kyoiku University, Education, Prof., 教育学部, 教授 (30009055)
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| Project Period (FY) |
1994 – 1996
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| Keywords | monodispersed particle / hematite / selective H_2O adsorption property / aluminum phosphate / diamond-like particle / double-spherical particle / spherical particle / calcium hydroxyapatite |
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| Research Abstract |
1) Monodispersed spherical aluminum phospshate particles are produced by aggregation of small primary particles. The size of these monodispersed spherical aluminum phospshate particles could be controlled by addition of urea and isopropylamine in the aging solutions. These spherical aluminum phospshate particles have a high selective H_2O adsorption property. This high selective adsorption was explained by the penetration of H_2O molecules into the cavities produced by the ougassing treatment in the vicinity of Al^<3+> ions.
2) Monodipersed hematite particles produced with various kinds of amines have changed in their shape, such as spherical, cubic, double-spherical. These particles possess inner OH^-ions in the lattice, so called as hydrohematite. Choride ions exibit on these particle surfaces, inducing a high surface acidity.
3) The crystallinity of calcium-magnesium hydroxyapatite was decreased with increase in the concentration of magnesium in the aging solution.
4) The amont of adsorbed bovine serum albumin depends on the Ca/P molar ratio when the paticle have a similar size, though it depends much stronger on the crystal face exposed to the surface rather than Ca/P molar ratio of the particles.
5) Surface treatment of calcium hydoxyapatite by alkylphosphate with various alkyl chain length change the particle surface to hydrophobic with a high porosity.
6) Monodispersed hematite particles with various sized diamond-like shape were produced by using a mix solvent system of FeCl_3aq.-dimethyformamide.
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