葡萄糖酮(APG)/水/烃溶液的流变行为和分数粘弹性建模

Mohamed A. Siddig
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摘要

这项工作的目的是研究葡萄糖酮-水-碳氢化合物体系微乳液的流变行为,并使用分数模型来描述这些体系的若干实验结果。研究考虑了四种不同类型的碳氢化合物。研究了临界应变以下随频率变化的存储量 G′和损耗模量 G″。研究发现,临界应变随着烷烃链长度的增加而减小,而零剪切粘度 η0 则与此相反。大多数微乳液在 10 rad s-1 角频率以下表现出稳定的弹性流体行为(G′ > G″)。在所研究的频率范围内,所有体系的弹性模量值都大于损耗模量,这表明它们具有更多的弹性行为。观察到剪切稀化行为,复合粘度随着碳氢链长度的增加而降低。碳氢化合物类型对流变行为的影响在十二烷体系中更为显著,该体系的 G′和 η0 均达到最大值。引入了弗里德里希-布劳恩模型,并用于描述烷基聚苷溶液的若干实验结果。分数流变学成功地描述了 Glucopone 表面活性剂溶液中的粘弹性现象,实验结果与理论预测之间的比较令人满意。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Rheological Behaviors and Fractional Viscoelastic Modeling of Glucopone (APG)/Water/Hydrocarbons Solutions
The aims of this work are to study the rheological behaviors of a microemulsion of Glucopone–water–hydrocarbon systems and to use a fractional model to describe several experimental results of these systems. Four different types of hydrocarbons were considered. The frequency dependent storage, G′, and loss modulus, G″, were investigated below the critical strain. The critical strain was found to decrease as the alkane chain lengths increased, while the opposite behavior was observed for zero shear viscosity, η0. Most of the microemulsions exhibited stable elastic fluid behavior (G′ > G″) below 10 rad s−1 angular frequency. For all systems, elastic modulus values were found to be greater than loss modulus in the frequency range studied, indicating more elastic behaviors. Shear-thinning behaviors were observed, and the complex viscosity decreased with an increase in hydrocarbon chain lengths. The effects of hydrocarbon types on the rheological behaviors were more profound in the dodecane systems which showed maximum values of G′ and η0. The Friedrich–Braun model was introduced and was used to describe several experimental results on Alkyl polyglocoside solutions. Fractional rheology successfully described the viscoelastic phenomena in Glucopone surfactant solutions and the comparisons between the experimental results and the theoretical predictions were found to be satisfactory.
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