Engineering the Crystallization Behavior of Triacylglycerols Using High Behenic Acid Stabilizers

Date

2017-04-13

Authors

Kim, Ga Yae

Journal Title

Journal ISSN

Volume Title

Publisher

University of Guelph

Abstract

High behenic acid stabilizer (HBS) was used to stabilize oils and accelerate the nucleation of fats. HBS stabilized liquid oil more effectively when there were more high-melting triacylglycerols (HMTs) (melting point > 30°C) in the oil to be stabilized and when cooled at a faster rate. Maximum oil stabilization efficiency of HBS in peanut oil was correlated with the lowest Cg, the highest nucleation rate, and the highest G′. On the other hand, the effect of HBS on the nucleation rate of fats was inversely correlated to the amount of HMTs present in fats as the nucleation of fats with a high level of HMTs (> 67 %) was mostly controlled by the native HMTs of fats. The mechanism of HBS on oil stabilization and nucleation enhancement was to co-crystallize with HMTs present in the “host” fat/oil, resulting in a formation of new fraction. The molecular compatibility between HBS and the “host” fat/oil is prerequisite for the oil stabilization and the nucleation enhancing effect of HBS to be effective.

Description

Keywords

stabilizers, fat crystallization, polymorphism, microstructure

Citation