Effect of diacylglycerol addition on crystallization properties of pure triacylglycerols

The objective of this study was to investigate the effects of blending triacylglycerols (TAGs) and diacylglycerols (DAGs) on the melting and crystallization properties in a fat system. To this end, differential scanning calorimetry (DSC), X-ray diffraction (XRD) and polarized light microscopy (PLM)...

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Bibliographic Details
Published in:Food research international 2014-01, Vol.55, p.436-444
Main Authors: Silva, Roberta Claro, Soares, Fabiana Andreia Schäfer De Martini, Maruyama, Jessica Mayumi, Dagostinho, Natalia Roque, Silva, Ylana Adami, Calligaris, Guilherme Andrade, Ribeiro, Ana Paula Badan, Cardoso, Lisandro Pavie, Gioielli, Luiz Antonio
Format: Article
Language:English
Subjects:
Biological and medical sciences
Blending
Crystallization
Differential scanning calorimetry
Food industries
Fundamental and applied biological sciences. Psychology
Melting
Microscopy
Polymorphism
Product life cycle
Production management
Tags
Triacylglycerols
Tripalmitin
Tristearin
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Summary:The objective of this study was to investigate the effects of blending triacylglycerols (TAGs) and diacylglycerols (DAGs) on the melting and crystallization properties in a fat system. To this end, differential scanning calorimetry (DSC), X-ray diffraction (XRD) and polarized light microscopy (PLM) methods were used. Different DAGs (diolein—OO, dipalmitin—PP and distearin—SS) were added at 5% to each TAG (triolein—OOO, tripalmitin—PPP and tristearin—SSS). DSC results showed that the addition of DAGs delayed the onset of crystallization of saturated TAGs (PPP and SSS). By contrast, the addition of DAGs to unsaturated TAG (OOO) accelerated the onset of crystallization, with the appearance of an extra crystallization peak upon the addition of SS and PP. PLM results revealed that the addition of OO affected the polymorphic transition of the TAGs studied findings were consistent with DSC melting curves and XRD results.
ISSN:0963-9969
1873-7145
DOI:10.1016/j.foodres.2013.11.037