Coalescence Behavior of Pure and Natural Fat Droplets Characterized via Micromanipulation

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• 作者：A. E. Thiel ; R. W. Hartel ; P. T. Spicer…
• 关键词：Coalescence ; Arrested coalescence ; Fat ; Emulsion
• 刊名：Journal of the American Oil Chemists' Society
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：93
• 期：11
• 页码：1467-1477
• 全文大小：698 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Industrial Chemistry and Chemical Engineering
  Analytical Chemistry
  Chemistry
  Biotechnology
  Biomaterials
  Agriculture
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1558-9331
• 卷排序：93

文摘

For two approaching oil droplets, a region of arrested coalescence lies between full coalescence and total stability. Here the fusion of two droplets begins, but they are stopped from fully relaxing into one spherical droplet. The internal rigidity of the solid fat network within each droplet can provide the resistance necessary to arrest the shape change driven by Laplace pressure. These intermediate doublet structures lead to the partially-coalesced fat networks important for the desired physical properties of ice cream and whipped topping. The use of micromanipulation techniques allows coalescence events between two oil droplets to be microscopically observed. In this study, oil droplets composed of different fats were manipulated at varying elastic moduli, interfacial tension, and radii. It was seen that increasing the elastic moduli of the droplets or increasing droplet radii resulted in coalescence being arrested earlier. Under these experimental conditions, different interfacial tensions did not change the coalescence behavior between two oil droplets.