磷酸化醋酸酯淀粉流变学特性的研究

Research on the rheology of phosphorylated starch acetic ester

采用流变仪研究了低取代度醋酸酯淀粉及其不同磷酸化程度产物的糊的流变特性。结果表明:所有的样品糊均呈现假塑性流体特征。在相同的温度下,剪切应力随剪切速率的增加而增大;在同一剪切速率下,样品糊的剪切应力随温度的上升而降低,剪切应力随取代度的增加而升高,表观黏度随着取代度的增加而上升。当DS>0.0416时,随着取代度的提高,剪切稀化也增强。

The rheology properties of differently Phosphate starch products were studied by rheometer. The results showed that starch pastes owned pseudoplastic and the shear-thinning characteristics. At the same temperature, the shear stress was higher when the shear rate increased; At the same shear veloeitv, shear stress was reduced while the temperature was increased, shear stress was higher when DS was increased and the apparent viscosity of pastes was higher as DS increased. When DS 〉0. 0416, the shear-thinning nature was higher while DS was increased.