NMR Imaging and Solid State High Resolution NMR Studies of Materials ; Properties and Internal Structural Changes in Materials.

材料的核磁共振成像和固态高分辨率核磁共振研究；

基本信息

批准号：
02453032
负责人：
WATANABE Tokuko
金额：
$ 4.54万
依托单位：
Tokyo University of Fisheries.
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

项目摘要

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.

在本研究中，通过使用NMR成像和固态高分辨率NMR方法来完成材料科学的新方法。 NMR成像技术被用作材料内部结构变化的一种侵入性，不断地分析方法。在以下四个研究项目中，NEW信息得到了钙化的无定形铝硅酸盐的结构变化：（1）直接将其直接变成Mullite as uss uss of Mullite的无定铝硅酸盐的结构变化。（2）Mullite前体从无定形变为和硫酸盐状的结构，最后变成mullite。（3）碱金属（Li，na，k）离子会影响Mullite的形成过程。2）研究了聚合物中溶剂扩散过程的成像：Aceton，DMSO，DMF和水中的聚碳酸酯和PMMA。确定了溶剂的溶胀速率或溶解度的速率。3）插入到粘土矿物中：ESR研究了DPPH在Montmorillonite钠和Saponite的层中的吸附。由于可扩展性的区别，它们之间的插值机制似乎有所不同。4）五配位铝制复合物的稳定性：5配位的AI复合物（在AI离子的协调化学中很少）在铝硅酸盐的钙化过程中发现。还计划对铝制复合物进行NMR研究。