| Budget Amount *help |
¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2012: ¥10,400,000 (Direct Cost: ¥8,000,000、Indirect Cost: ¥2,400,000)
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| Outline of Final Research Achievements |
A one-step mechanochemical synthesis method has been newly developed for a low-cost and environmentally friendly preparation of water-based magnetic fluids that citrate-coated magnetite nanoparticles are stably dispersed in water medium. In this method, an iron-free citric acid solution is wet-milled in a tumbling ball mill with steel balls at room temperature. It was found that the magnetite nanoparticles can be formed according to the reaction mechanism which is based on the oxidation-reduction processes of the corrosion of steel. Also, the formation reaction was kinetically analyzed. Furthermore, it is experimentally confirmed that a scale-up of this process can be achieved relatively easily.
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