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Effect of span 85 on crystallization kinetics of palm oil
  
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KeyWord:Avrami equation  solid fat content  span 85  crystallization kinetics
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LIU Haixin  
BAI Xinpeng  
SU Na，etc  
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Abstract:
      The isothermal crystallization behaviors of palm oil and palm oil added with 0.01%-0.1% span 85 were tested using nuclear magnetic resonance spectrometer,and the isothermal crystallization kinetics of the samples was further researched by the Avrami equation to study the effect of span 85 on crystallization behavior of palm oil. The results showed that the Avrami exponents of palm oil and palm oil added with 0.01%-0.1% span 85 were between 1.422 and 1.912,which indicated that the crystal growth of samples existed the two- dimensional growth; span 85 could inhibit the crystallization of palm oil, and the inhibitory effect improved with dosage of span 85 increasing, which manifested that the crystallization rate constant decreased and half-crystallization time prolonged.
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