食品科学 ›› 2017, Vol. 38 ›› Issue (23): 59-64.doi: 10.7506/spkx1002-6630-201723010

• 基础研究 • 上一篇    下一篇

米糠蜡对稻米油基凝胶油形成的影响及动力学

赵 月,邹德智,李婷婷,王 彤,江连洲*,于殿宇*   

  1. 东北农业大学食品学院,黑龙江 哈尔滨 150030
  • 出版日期:2017-12-15 发布日期:2017-12-07
  • 基金资助:
    “十三五”国家科技支撑计划项目(2016YFD0401402-02);国家自然科学基金面上项目(31571880)

Effect of Rice Bran Wax on the Formation of Oleogel and Its Kinetics

ZHAO Yue, ZOU Dezhi, LI Tingting, WANG Tong, JIANG Lianzhou*, YU Dianyu*   

  1. College of Food Science, Northeast Agricultural University, Harbin 150030, China
  • Online:2017-12-15 Published:2017-12-07

摘要: 以三级稻米油为基料油,研究了米糠蜡(rice bran wax,RBW)添加量对凝胶油形成特性的影响及凝胶 油结晶形成的动力学参数。结果表明:在25 ℃时,RBW添加量为4%时便可形成凝胶油。随着RBW添加量的增 加,凝胶油的硬度明显增加,贮藏30 d后凝胶油硬度变化不显著。凝胶油的固体脂肪含量也随RBW添加量的增加 呈增多趋势,凝胶油主要为β′晶体。4%和7% RBW添加量凝胶油晶体为絮状,添加量为10%时凝胶油晶体转变为 长枝晶状且密度增大。该凝胶油仅有一个结晶峰,采用Avrami方程模型拟合出的直线具有良好的线性关系(R2= 0.934 31),说明Avrami方程能较好地适用于稻米油基凝胶油结晶过程的研究,得到Avrami指数n为1.396 83,表明 该凝胶油的晶体成核为均相瞬时成核并按照一维与二维混合结晶方式生长。

关键词: 三级稻米油, 米糠蜡, 凝胶油, 凝胶油特性, 动力学

Abstract: In this paper, the effect of addition of rice bran wax (RBW) to third-grade rice bran oil (RBO) on the formation and crystallization kinetic parameters of oleogel was studied. The results showed that addition of 4% RBW showed gelling behavior in RBO at 25 ℃. The hardness of oleogels showed an increasing trend with the increase of RBW content and was not changed significantly after 30 days of storage. With the increase of RBW content, solid fat content of oleogels increased. And the crystal structure of oleogels mainly consisted of β’ crystal. The crystals of oleogels with 4% and 7% RBW were formed in floc shape. When the content of RBW was increased to 10%, the crystal of oleogels changed into a long dendritic shape and the spatial distribution density increased. As the oleogels had only one crystal peak, the Avrami equation model was used to study the crystallization kinetics and a good linear relationship was obtained (R2 = 0.934 31), indicating that Avrami equation could be applied to simulate the crystallization process of oleogels. The Avrami exponent n obtained by fitting the data was 1.396 83, suggesting the simultaneous occurrence of instantaneous nucleation and one-dimensional and two-dimensional crystal growth.

Key words: third-grade rice bran oil, rice bran wax, oleogel, oleogel properties, kinetics

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