Journal of South China University of Technology (Natural Science Edition) ›› 2014, Vol. 42 ›› Issue (3): 117-124.doi: 10.3969/j.issn.1000-565X.2014.03.019

• Food Science & Technology • Previous Articles     Next Articles

Compatibility and Non- Isothermal Crystallization Behavior of Fractionated Palm Oil

Zhang Xia1,2 Li Lin1 Xie He1 Su Jian- yu1 Xu Zhen- bo1 Liu Guo- qin1 Li Bing1   

  1. 1.School of Light Industry and Food Sciences,South China University of Technology,Guangzhou 510640,Guangdong,China;2.School of Chemistry and Chemical Engineering, South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2013-09-17 Online:2014-03-25 Published:2014-02-19
  • Contact: 李冰(1972-)女，博士，教授，主要从事天然产物中活性成分的体外制备及功效研究． E-mail:bli@scut.edu.cn
  • About author:张霞(1985-)女，博士，助理研究员，主要从事功能性油脂开发及品质控制研究．E-mail:z．xia@ scut．edu．cn
  • Supported by:

    国家自然科学基金资助项目(31130042， 21076086);国家 “十二五” 科技支撑项目(2012BAD37B01);华南理工大学中央高校基本科研业务费专项资金资助项目 (2014ZB0006);中国博士后科学基金资助项目(2014M552204)

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Abstract:

The compatibility and non- isothermal crystallization of fractionated palm oil greatly affect the quality offractionated palm oil- based plastic oils.For better application of fractionated palm oil,the compatibility of theblends of palm stearin (44℃) and palmitin (24℃) was studied by means of pulsed nuclear magnetic resonanceand isothermal crystallization curves,and the non- isothermal crystallization behavior of the blends was investigatedvia differential scanning calorimetry.The results show that the binary system of palm stearin and palmitin is of goodcompatibility and forms a eutectic mixture only when the palm stearin proportion and the temperature are respective-ly higher than 50% and 33.3℃. Moreover,it is found that,during the non- isothermal crystallization of theblends,the exothermic peak broadens and the peak temperature increases with the palm stearin proportion at a con-stant cooling rate,and that the enthalpy variation increases with the cooling rate when the palm stearin proportionkeeps constant.

Key words: fractionated palm oil, isothermal crystallization curve, compatibility, non- isothermal crystallization