FOOD SCIENCE ›› 2009, Vol. 30 ›› Issue (3): 95-99.doi: 10.7506/spkx1002-6630-200903020

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Study on Rheological Properties of Waxy Corn Flour Paste Processed by Different Milling Ways

GONG Kui-jie1,2,DONG Hai-zhou2,XU Qiu-ping1,QI Guo-dong1   

  1. (1. Crop Research Institute, Shandong Academy of Agricultural Science, Jinan 250100, China;
    2. College of Food Science and Engineering, Shandong Agricultural University, Tai'an 271018, China )
  • Received:2008-01-11 Revised:2008-05-14 Online:2009-02-01 Published:2010-12-29
  • Contact: GONG Kui-jie1,2 E-mail:gongkj@sina.com

Abstract:

Rheological properties of waxy corn flour and effects of different flour milling ways on them were studied, and rheological models were established. The results indicated that waxy corn flour paste is pseudoplastic fluid, and the shear stress and apparent viscosity are affected by shear rate, concentration and temperature, which have power function relationship each other. A special change in the shear stress or apparent viscosity depends on concentration, and 6% concentration is the inflection point.Furthermore, the flour paste milled by extrusion way shows the Newtonian fluid characteristics, while the wet-milling way is most beneficial to keep the gluing property.

Key words: waxy corn flour, rheological properties, extrusion, wet-milling

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