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A New Approach to Distinguish Thixotropic and Viscoelastic Phenomena
Food Biophysics ( IF 3 ) Pub Date : 2019-08-23 , DOI: 10.1007/s11483-019-09607-w
Ali Alghooneh , Seyed M. A. Razavi , Stefan Kasapis

A novel approach for distinguishing the viscoelastic and thixotropic phenomena of predisturbed and intact networks at short and long timescales of observation was proposed using stress relaxation, creep/recovery, single shear decay, and in-shear structural recovery experiments. The method was able to illustrate the connections patterns of the internal microstructure of hydrocolloids and its alteration over time. To test the universality of the new approach, we studied seven commercial and four emerging hydrocolloids. Moreover, to find out the correlation between the proposed parameters from this approach and the fundamental rheological parameters of the selected hydrocolloids, a principal component analysis (PCA) was employed, which showed an excellent correlation between the parameters of all hydrocolloids in predisturbed and intact states at short and long timescales. This work assumed that two different patterns of linkage connection exist, but the analysis can be extended to more than two connection patterns of linkages.

中文翻译:

区分触变和粘弹性现象的新方法

利用应力松弛,蠕变/恢复,单剪切衰减和剪切内结构恢复实验,提出了一种在短期和长期观察时区分预扰动和完整网络的粘弹性和触变现象的新方法。该方法能够说明水胶体内部微观结构的连接方式及其随时间的变化。为了测试这种新方法的普遍性,我们研究了七个商业和四个新兴的水胶体。此外,为了找出该方法提出的参数与所选水胶体的基本流变参数之间的相关性,采用了主成分分析(PCA),在短时间和长时间范围内,显示了所有处于预扰动状态和完整状态的水胶体参数之间的极好的相关性。这项工作假定存在两种不同的链接连接模式,但是可以将分析扩展到两个以上的链接连接模式。
更新日期:2019-08-23
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