Phase Behavior of Binary Blends of Four Different Waxes

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• 作者：Sarbojeet Jana ; Silvana Martini
• 关键词：Crystal ; Waxes ; Phase behavior ; Binary System ; Eutectic ; Monotectic ; Solid solutions ; Fractal dimension ; Melting profile ; Crystal morphology
• 刊名：Journal of the American Oil Chemists' Society
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：93
• 期：4
• 页码：543-554
• 全文大小：1,388 KB
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• 作者单位：Sarbojeet Jana (1)
  Silvana Martini (1)
  
  1. Department of Nutrition, Dietetics, and Food Sciences, Utah State University, 8700 Old Main Hill, Logan, UT, 84322-8700, USA
  
• 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

文摘

The objective of this study was to investigate the phase behavior of binary blends of four waxes—beeswax (BW), paraffin wax (PW), sunflower wax (SFW), and rice bran wax (RBW)—using differential scanning calorimetry (DSC) and polarized light microscopy (PLM). Blends of BW/PW, RBW/PW, SFW/PW, SFW/RBW, SFW/BW, and RBW/BW were crystallized in a DSC, and their melting behavior was used to build binary phase diagrams. The microstructure of the crystalline networks formed in these blends was analyzed using PLM. BW/PW, SFW/PW, SFW/BW, and RBW/BW blends showed eutectic phase behavior, while RBW/SFW showed continuous solid solution and the RBW/PW blend showed monotectic behavior. Results from the box-counting fractal dimension (D _b ) measurement of crystal morphology showed higher D _b values for the 20 and 80 % wax blends, irrespective of crystallization temperature or wax type. D _b values of single waxes decrease as temperature increases.