淀粉凝胶力学性能的研究

    Study on the Mechanical Properties of Starch Gels

    • 摘要: 淀粉凝胶的力学性能决定其“力学味觉”或“流变学味觉”如粘弹性、硬度、粗糙感等属性。材料试验机研究的结果表明,在一定的淀粉乳浓度范围内,凝胶强度和弹性模量随淀粉乳浓度的增加而增加,而凝胶弹性则基本保持不变。由于淀粉分子结构之间的差异,导致本试验研究对象——三种淀粉凝胶力学性能之间的不同:凝胶强度的大小为葛根淀粉>马铃薯淀粉>玉米淀粉;凝胶弹性为葛根淀粉>玉米淀粉>马铃薯淀粉;弹性模量为马铃薯淀粉>葛根淀粉>玉米淀粉。

       

      Abstract: The aim of this work was to investigate the starch gel texture that influenced the mechanical or rheological sense of taste of the starch gel foods. The test result showed that the gel strength and the elastic modulus was increased while the gel elasticity was almost not changed with the increasing of the starch concentration. The differences in the molecular structures such as the amylose average degree of polymerization DP, the amylopectin average chain length CL were the principal factors that caused the differences in the gel texture, so as to cause the differences in the gel mechanical features as indicated in the orders of the three different starches examined in this study: kuzu starch>potato starch>maize starch(gel strength); kuzu starch>maize starch>potato starch(gel elasticity); potato starch>kuzu starch>maize starch(elastic modulus).

       

    /

    返回文章
    返回