1991 Fiscal Year Final Research Report Summary
NMR Imaging and Solid State High Resolution NMR Studies of Materials ; Properties and Internal Structural Changes in Materials.
| Project/Area Number |
02453032
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
分析・地球化学
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| Research Institution | Tokyo University of Fisheries. |
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Principal Investigator |
WATANABE Tokuko Tokyo University of Fisheries・Faculty of Fisheries, Professor, 水産学部, 教授 (40092382)
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| Co-Investigator(Kenkyū-buntansha) |
YOKOYAMA Takushi Kyushu University, College of General Education, Assoc. Professor, 教養部, 助教授 (20136419)
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| Project Period (FY) |
1990 – 1991
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| Keywords | NMR imaging / solid state MAS / NMR / Al-NMR / Si-NMR / Mullite / Polymer material / diffusion / ceramics |
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| Research Abstract |
In the present investigation, a new approach in material sciences has been done by using NMR imaging and solid state high resolution NMR methods. NMR imaging technique was used as an invasively, and continuously analysing method of the internal structural changes of materials.
New informations in the following four research projects were obtained ;
1)The structural change of amorphous aluminosilicates in the process of calcination : (1)Amorphous aluminosilicate which was directly changed into mullite was proposed as the mullite precursor. (2)The mullite precursor changes from amorphous to andulsite-like structure and finally into mullite. (3)Alkaline metal(Li, Na, K)ions affect the mullite formation process.
2)Imaging of diffusion processes of solvent in polymers : Polycarbonate and PMMA in aceton, DMSO, DMF and water were investigated. The swelling rate of solvent or the rate of solubility were determined.
3)Intercalation into clay minerals : The adsorption of DPPH in the interlayer of sodium montmorillonite and saponite was investigated by ESR. The intercalation mechanism seemed to be different between them because of the distinction of expandability.
4)Stability of five-coordinated Aluminium complexes : 5-coordinated AI complex, which is few in coordination chemistry of AI ion, was found in the calcinating process of aluminosilicates. NMR study of Aluminum complexes was planned additionally.
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