Design and synthesis of new-type ultra-fine magnetic fluid and its evaluation of material property

Recently, it begins to be focus the spotlight of attention upon that the magnetic material of ultra fine particles. Therefore, in order to improve these characteristics of magnetite, we have been tried to combine Fe3O4 particle with polysaccharide from fifteen years ago. The water solubility polysaccharide which had magnetite (Fe3O4) of the magnetic oxidized iron and living body adaptability were chosen by this research to have living body adaptability and to hold the design of the new compound material which had magnetism and dispersion stability. Magnetite chosen as the core material was moved to the part of the magnetic, glycosaminoglycans (mucopolysaccharides) and compound polysaccharides were used as the dispersion material of the non-magnetism as the outside shell coat material from the polysaccharide, and the composition of the materials were done. It decentralizes the fine particle in the solution, and these were thought that the part of preventing cohesion could be played so that it may contain the hydrophilic functional group during the composition sugar and chemistry may be adsorbed in the combination with the core. The sample made by this research could be placed on the function material in which had multiple functions (magnetism, fluidity, living body adaptability) again as a really new material in which didn't see the kind by now. And evaluation and measurement were done by this research about the character of the made material in which examined how to make this new material of new type ultra-fine magnetic fluids, and it would be wanted to aim at the control of the magnetic character, the dispersion stability, the establishment of the preparation condition.