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采用纳米微乳液法,以三嵌段共聚物聚氧乙烯-聚氧丙烯-聚氧乙烯(PEO-PPO-PEO)为表面活性剂,乙酰丙酮镧(III),乙酰丙酮锰(III)和乙酰丙酮锶(II)为前驱体,1,2-十六烷二醇为还原剂成功合成了水溶性La0.88Sr0.12MnO3纳米粒子.FT-IR分析证实该纳米粒子表面存在PEO-PPO-PEO分子,XRD和TEM分析表明该纳米粒子基本上呈球形、粒径分布窄、结晶度高,VSM测试表明该纳米粒子室温下显示软铁磁性.纳米粒子在水中快速和高效的分散收集过程,表明该纳米粒子具有良好的水溶性和磁操控性.
The triblock copolymer of polyoxyethylene-polyoxypropylene-polyoxyethylene (PEO-PPO-PEO) as surfactant, lanthanum (III) acetylacetonate, manganese (III) acetylacetonate and acetyl Acetone-strontium (II) as precursor and 1,2-hexadecanediol as reductant, the water-soluble La0.88Sr0.12MnO3 nanoparticles were synthesized successfully.FT-IR analysis confirmed the presence of PEO-PPO-PEO molecules on the surface of the nanoparticles The results of XRD and TEM showed that the nanoparticles were basically spherical with narrow particle size distribution and high crystallinity.The results of VSM showed that the nanoparticles showed soft ferromagnetism at room temperature.The rapid and efficient dispersion and collection of nanoparticles in water showed that the Nanoparticles have good water solubility and magnetic manipulation.