Premium
Effect of High‐Intensity Ultrasound on the Crystallization Behavior of High‐Stearic High‐Oleic Sunflower Oil Soft Stearin
Author(s) -
RincónCardona Jaime A.,
AgudeloLaverde Lina M.,
Herrera María L.,
Martini Silvana
Publication year - 2015
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/s11746-015-2620-9
Subject(s) - crystallization , sonication , sunflower oil , materials science , nucleation , palm stearin , chemical engineering , stearic acid , chemistry , composite material , organic chemistry , food science , palm oil , engineering
The objective of this research was to evaluate the effect of high‐intensity ultrasound (HIU) and crystallization temperature ( T c ) on the crystallization behavior, melting profile, and elasticity of a soft stearin fraction of high‐stearic high‐oleic sunflower oil. Results showed that HIU can be used to induce and increase the rate of crystallization of the soft stearin with significantly higher SFC values obtained in the sonicated samples, especially at higher T c . SFC values were fitted using the Avrami model, and higher k n and lower n values were obtained when samples were crystallized with sonication, suggesting that sonicated samples crystallized faster and through an instantaneous nucleation mechanism. In addition, the crystal morphology, melting behavior, and viscoelasticity were significantly affected by sonication.