华南理工大学学报(自然科学版) ›› 2011, Vol. 39 ›› Issue (9): 17-21.doi: 10.3969/j.issn.1000-565X.2011.09.004

• 食品科学与技术 • 上一篇    下一篇

脉冲电场对西米淀粉物化性质的影响

张本山1 李芬芬1 陈福泉1,2   

  1. 1.华南理工大学 轻工与食品学院,广东广州510640; 2.华南理工大学 聚合物新型成型装备国家工程研究中心,广东 广州 510640
  • 收稿日期:2011-01-06 修回日期:2011-04-15 出版日期:2011-09-25 发布日期:2011-08-02
  • 通信作者: 张本山(1964-) ,男,博士,副教授,主要从事淀粉材料及污水处理研究. E-mail:zbs968@ vip.sina.com
  • 作者简介:张本山(1964-) ,男,博士,副教授,主要从事淀粉材料及污水处理研究.
  • 基金资助:

    广东省科技计划项目( 2008A08040300, 2008A08040301) ; 国家科技支撑计划项目( 2006BAD27B04)

Influence of Pulsed Electric Fields on Physicochemical Properties of Sago Starch

Zhang Ben-shan1  Li Fen-fenChen Fu-quan1,2   

  1. 1. School of Light Industry and Food Sciences,South China University of Technology,Guangzhou 510640,Guangdong,China; 2. National Engineering Research Center of Novel Equipment for Polymer Processing,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2011-01-06 Revised:2011-04-15 Online:2011-09-25 Published:2011-08-02
  • Contact: 张本山(1964-) ,男,博士,副教授,主要从事淀粉材料及污水处理研究. E-mail:zbs968@ vip.sina.com
  • About author:张本山(1964-) ,男,博士,副教授,主要从事淀粉材料及污水处理研究.
  • Supported by:

    广东省科技计划项目( 2008A08040300, 2008A08040301) ; 国家科技支撑计划项目( 2006BAD27B04)

摘要: 西米淀粉( 8%) 经过30,40 和50 kV/cm 的脉冲电场处理后,利用扫描电镜、激光粒度仪、X 射线衍射仪、差示扫描量热仪和Brabender 黏度仪等对其处理后的物化性质进行了研究.结果表明: 经过脉冲电场处理后,西米淀粉的颗粒形貌和结晶结构遭到破坏; 随脉冲电场强度的增加,淀粉颗粒形貌的破坏更加明显; 经过50 kV/cm 脉冲电场处理后,西米淀粉相对结晶度显著减小; 经脉冲电场处理后的西米淀粉,其体积平均粒径和表面积平均粒径减小; 起糊温度、峰值温度、糊化焓及热糊稳定性下降,凝胶性和凝沉性增强.

关键词: 西米淀粉, 物化性质, 脉冲电场, 电场强度

Abstract:

Sago starch-water suspensions ( 8.0%) were subjected to pulsed electric fields ( PEF) at 30,40 and 50 kV/cm,respectively,and the physicochemical properties of the treated starch were investigated by means of the scanning electron microscopy,the laser scattering,the X-ray diffraction,the differential scanning calorimetry and the Brabender viscosity test. The results show that,after PEF treatment,the granule morphology and crystalline structure of the starch are both damaged,that the damage becomes more significant with the increase of the electric field strength,that,after the PEF treatment at 50 kV/cm,the relative crystallinity remarkably decreases,that the PEF treatment results in an obvious decrease of granule size,and that gelatinization temperature,the peak temperature,the gelatinization enthalpy and the hot paste stability all decreased,while the gelling and the retrogradation both improved.

Key words: sago starch, physicochemical property, pulsed electric field, electric field strength

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