食品科学 ›› 2010, Vol. 31 ›› Issue (3): 49-54.doi: 10.7506/spkx1002-6300-201003011

• 基础研究 • 上一篇    下一篇

大米淀粉及其不同取代度的磷酸酯淀粉的糊化和流变特性

林亲录1,肖华西1,李丽辉1,刘一洋2,田 蔚2   

  1. 1.中南林业科技大学食品科学与工程学院 2.湖南农业大学食品科技学院
  • 收稿日期:2009-04-23 修回日期:2009-09-27 出版日期:2010-02-01 发布日期:2010-12-29
  • 通讯作者: 林亲录 E-mail:lql0403@yahoo.com.cn
  • 基金资助:

    国家“863”计划项目(2006AA10Z341);湖南省重大科技专项项目(2007FJ1007)

Pasting and Rheological Properties of Rice Starch and Starch Phosphate with Different Degrees of Substitution

LIN Qin-lu1,XIAO Hua-xi1,LI Li-hui1,LIU Yi-yang2,TIAN Wei2   

  1. 1. Faculty of Food Science and Engineering, Center South University of Forestry and Technology, Changsha 410004, China;
    2. College of Food Science and Technology, Hunan Agricultural University, Changsha 410128, China
  • Received:2009-04-23 Revised:2009-09-27 Online:2010-02-01 Published:2010-12-29
  • Contact: LIN Qin-lu E-mail:lql0403@yahoo.com.cn

摘要:

粳米淀粉与磷酸二氢钠发生酯化反应,通过改变反应温度得到取代度分别为0.028、0.049、0.073 和0.14的磷酸酯淀粉。使用快速黏度分析仪和流变仪对比测定粳米淀粉及具有不同取代度的磷酸酯淀粉的糊化和流变特性。快速黏度分析仪测定的糊化特性显示PO43- 与淀粉的结合降低了淀粉的糊化温度,升高了淀粉的峰值黏度,与粳米淀粉相比,磷酸酯淀粉更不易回生。流变仪测定的流变特性显示高取代度的磷酸酯淀粉抗剪切,随着取代度的增加,凝胶硬度降低,凝胶黏性增强。

关键词: 粳米, 磷酸酯淀粉, 取代度, 糊化特性, 流变特性

Abstract:

Rice starch phosphate with substitution degrees of 0.028, 0.049, 0.073 and 0.14 were obtained through esterification reaction between rice starch and sodium dihydrogen phosphate at different temperatures. The pasting and rheological properties of rice starch and starch phosphate with different degrees of substitution (DS) were determined using rapid viscosity analyzer (RVA) and rheometer. Results showed that the incorporation of phosphate in rice starch resulted in reduced pasting temperature and increased of viscosity. Compared to rice starch, rice starch phosphate exhibited better anti-retrogration property. In addition, starch phosphate with high DS had high capacity to resist shearing force and declined pasting hardness and enhanced pasting viscosity.

Key words: rice, starch phosphate, degree of substitution, pasting property, rheological property

中图分类号: