Use of Microemulsions in the Formation and Characterization of Ultrafine Magnetic Oxide Particles (Expedited Award)

微乳液在超细磁性氧化物颗粒的形成和表征中的应用（加急奖）

• 批准号: 8616883
• 负责人: Dinesh Shah
• 金额: --
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1986
• 资助国家: 美国
• 起止时间: 1986-09-01 至 1989-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8616883&HistoricalAwards=false
• 关键词: Use; Microemulsions; Formation; Characterization; Ultrafine

This project involves the formation and characteriaztion of ultrafine magnetic oxide particles using microemulsions. Microemulsions are thermodynamically stable isotropic dispersions of water and oil stabilized by surfactants. Such systems consist of 100-1000 Angstrom dispersed droplets. The reactions in such microemulsions can be utilized to produce ultrafine particles of iron oxide. With the precursor species solubilized in the dispersed droplets, the sollisions and fusion of such droplets as well as the subsequent coagulation of primary particles result in the formation of ultrafine particles. Previous research on the coalenscence and fusion of such water droplets in microemulsions has revealed that such coalescence can be promoted or retarded by the use of various additives. The investigators have produced 50-500 Angstrom AgCl particles that have an important relationship to photographic technology.

本项目涉及使用微乳液形成和表征超细磁性氧化物颗粒。微乳液是由表面活性剂稳定的水和油的热稳定的各向同性分散体。这种系统由100-1000埃分散的液滴组成。这种微乳中的反应可用于生产氧化铁的超细颗粒。前驱体物质被溶解在分散的液滴中，液滴的凝固和融合以及随后的初级颗粒的凝固导致超细颗粒的形成。以往对微乳中水滴的聚并融合的研究表明，各种添加剂的使用可以促进或延缓这种聚并。研究人员已经生产出50-500埃的AgCl粒子，这些粒子与摄影技术有着重要的关系。