Research Article | OPEN ACCESS
Isothermal Crystallization Kinetics of Palm Oil with Additives
N. Su, Y.M. Li, X.P. Bai, Y.Z. Zhang, H.X. Liu, J.Q. Li and P. Jie
College of Food Science and Engineering, Hainan University, The Haikou Key Lab of Bioactive Substance and Functional Foods, Haikou 570228, China
Advance Journal of Food Science and Technology 2015 10:768-772
Received: October 07, 2014 | Accepted: November 3, 2014 | Published: April 05, 2015
Abstract
This study investigates the isothermal crystallization kinetics of palm oil with additives by Differential Scanning Calorimetry (DSC). The induction time of nucleation and crystallization are obtained by simulating the crystal process using the Gompertz model. The equilibrium melting temperature is obtained via the Hoffman-Weeks methods. The Gibbs free energy of nucleation was calculated by using the Fisher-Turnbull equation and the equilibrium melting temperature. The results indicate that the span 85 has an inhibition effect on nucleation and crystallization kinetics of palm oil. The span 85 can raise the equilibrium melting temperature of palm oil. The span 85 can obviously delay the induction time of nucleation and crystallization at 0.01 and 0.1% level. Although span 85 at 0.05% concentration level also can delay the induction time, it exhibits an effect of promoting nucleation. However, the crystal is uncomplicated in the system containing additives compared to the pure palm oil.
Keywords:
Crystallization kinetics, fisher-turnbull, Gompertz, palm oil, span 85,
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Competing interests
The authors have no competing interests.
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The authors have no competing interests.
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