| Project/Area Number |
10450245
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Inorganic materials/Physical properties
|
|---|
| Research Institution | MIYAZAKI UNIVERSITY |
|---|
Principal Investigator |
KIJIMA Tsuyoshi FACULTY OF ENGINEERING, MIYAZAKI UNIVERSITY, Prof., 工学部, 教授 (90040451)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
YADA Mitsunori FACULTY OF ENGINEERING, MIYAZAKI UNIVERSITY, Research Assist., 工学部, 助手 (20274772)
MACHIDA Masato FACULTY OF ENGINEERING, MIYAZAKI UNIVERSITY, Assoc. Prof., 工学部, 助教授 (70211563)
|
|---|
| Project Period (FY) |
1998 – 1999
|
| Project Status |
Completed (Fiscal Year 1999)
|
| Budget Amount *help |
¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1999: ¥1,100,000 (Direct Cost: ¥1,100,000)
|
|---|
| Keywords | Mesocomposite materials / Template ion exchange / Aluminum oxide / Lanthanoid oxides / Porous materials / Calcium phosphate / Silver microparticles / Polyoxyethylene / Liquid crystal / セラミックス / 酸化イットリウム / メソポーラスコンポジット |
|---|
| Research Abstract |
This project was intended to develop the template ion exchange method for converting mesostructured inorganic/organic composites into mesoporous materials as well as to synthesize new mesoporous or mosocomposite materials.
1) Mesostructured rare-earth, gallium, aluminium-yittrium and galliumu-yittrium single or double oxides templated by dodecyl sulfate assemblies were synthesized by the homogeneous precipitation method. The oxides were converted by sulfate/acetate anion exchange into mesoporous hexagonal-structured materials with a specific surface area 〜300 mィイD12ィエD1gィイD1-1ィエD1. Further study of the optical and magnetic properties of the rare earth based materials are in progress.
2) For the aluminum oxide based dodecyl sulfate mesocomposite, the exchange of the template ions with long chain carboxylate ions or furfryl alcohol specie served to considerably improve the thermal stability of the mesostructured framework, but not leading to its conversion into a mesoporous material stable at temperatures up to 500℃.
3) On the basis of the measurement of pH and electric conductivity as a function of reaction time, the addition of protons in the polyoxyethylene/water system was clarified to promote the formation liquid crystalline phases. This led to the successful preparation of homogeneous liquid crystalline phases containing silver ions, resulting in micro-or dendritic particles of silver.
4) Preferred crystallization of octacalcium phosphate at pH7.0 was found to occur in the presence of DL-, D-and L-n-alkyl-α-amino acids CィイD2nィエD2HィイD22n+1ィエD2CH(NHィイD22ィエD2)COOH (n=0,2,3,4,6) accompanying an increase in crystallinity, interlayer contraction or complexation with amino acid depending on their carbon number and enantiomeric or racemic stereospecificity. This may contribute to the development of new types of mesoporous apatitic materials.
|
