The solid-liquid phase diagrams of binary mixtures of consecutive, even saturated fatty acids
authors Costa, MC; Sardo, M; Rolemberg, MP; Coutinho, JAP; Meirelles, AJA; Ribeiro-Claro, P; Krahenbuhl, MA
nationality International
journal CHEMISTRY AND PHYSICS OF LIPIDS
author keywords Solid-liquid equilibrium; Saturated fatty acids; Phase diagram; DSC; XRD; FT-Raman
keywords LAURIC-ACID; OLEIC-ACID; STEARIC-ACID; RAMAN-SPECTROSCOPY; CRYSTAL-STRUCTURE; CAPRIC ACID; POLYMORPHISM; BEHAVIOR; FORM; SYSTEMS
abstract For the first time, the solid-liquid phase diagrams of five binary mixtures of saturated fatty acids are here presented. These mixtures are formed of caprylic acid (C-8:0) + capric acid (C-10:0), capric acid (C-10:0) + lauric acid (C-12:0), lauric acid (C-12:0) + myristic acid (C-14:0), myristic acid (C-14:0) + palmitic acid (C-16:0) and palmitic acid (C-16:0) + stearic acid (C-18:0). The information used in these phase diagrams was obtained by differential scanning calorimetry (DSC) X-ray diffraction (XRD), FT-Raman spectrometry and polarized light microscopy, aiming at a complete understanding of the phase diagrams of the fatty acid mixtures. All of the phase diagrams reported here presented the same global behavior and it was shown that this was far more complex than previously imagined. They presented not only peritectic and eutectic reactions, but also metatectic reactions, due to solid-solid phase transitions common in fatty acids and regions of solid solution not previously reported. This work contributes to the elucidation of the phase behavior of these important biochemical molecules, with implications in various industrial applications. (C) 2009 Elsevier Ireland Ltd. All rights reserved.
publisher ELSEVIER IRELAND LTD
issn 0009-3084
year published 2009
volume 160
issue 2
beginning page 85
ending page 97
digital object identifier (doi) 10.1016/j.chemphyslip.2009.05.004
web of science category Biochemistry & Molecular Biology; Biophysics
subject category Biochemistry & Molecular Biology; Biophysics
unique article identifier WOS:000268289200002
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journal impact factor 2.094
5 year journal impact factor 2.791
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