Characterization of palm kernel oil, palm stearin, and palm olein blends in isosolid diagrams

Authors

  • Sheng-Li Zhou,

    1. State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R. China
    2. East Ocean Oils and Grains Industrial (Zhangjiagang) Co., Ltd., Zhangjiagang, Suzhou, Jiangsu, P. R. China
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  • Fu-Qing Zhang,

    1. East Ocean Oils and Grains Industrial (Zhangjiagang) Co., Ltd., Zhangjiagang, Suzhou, Jiangsu, P. R. China
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  • Qing-Zhe Jin,

    Corresponding author
    1. State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R. China
    • State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, Jiangsu, P. R. China Fax: +86-510-85876799.
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  • Yuan-Fa Liu,

    1. State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R. China
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  • Liang Shan,

    1. State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R. China
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  • Ting Zhang,

    1. State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R. China
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  • Xiao-Qiang Zou,

    1. State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R. China
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  • Xing-Guo Wang

    1. State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R. China
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Abstract

The binary and ternary phase behaviors of mixtures of palm kernel oil (PKO), palm stearin (POs), and palm olein (POo) were studied using isosolid diagrams. Both PKO/POs and PKO/POo binaries displayed eutectic behavior at high temperature, while binary POs/POo mixture showed good compatibility and only slight monotectic effect was observed at low temperature in the 10–50% POs addition range. Ternary phase diagrams showed that eutectic effects were observed in all ternary blends at 10–20°C and the degree of interaction depended on the content of PKO, POs, and POo in the blends. The depression of the contours in the isosolid diagrams demonstrated the dominant role of PKO and POo in the ternary system. When the amounts of POs and POo were both 45%, the derivation (ΔSFC) reached a minimum at 10–20°C, which means the weakest eutectic interaction. X-ray diffraction results showed that addition of PKO into the blends could stabilize the β′ crystal whereas the increase of the content of POs would make the blends undergo a β′ to β polymorph state transformation.

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