首页> 外文期刊>Journal of Colloid and Interface Science >The effects of polymer concentration, shear rate and temperature on the gelation time of aqueous Silica-Poly(ethylene-oxide) 'Shake-gels'
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The effects of polymer concentration, shear rate and temperature on the gelation time of aqueous Silica-Poly(ethylene-oxide) 'Shake-gels'

机译:聚合物浓度,剪切速率和温度对水性二氧化硅 - 聚(乙烯氧化物)“摇凝胶”的凝胶化时间的影响

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摘要

Hypothesis: Aqueous mixtures of silica and Poly(ethylene-oxide) (PEO) are known as "Shake-gels" due to the formation of reversible gels when subject to an applied force, such as shaking. This shear-thickening effect can be observed using a rheometer, via distinct and abrupt increases in the viscosity of the material. Preliminary experiments qualitatively showed that the time elapsed before this occurs, termed the gelation time, varied depending on the conditions used. This paper reports on a systematic study into the effects of polymer concentration, shear rate and temperature on the gelation time, to quantify any relationships that exist between the variables and develop understanding of the gelation mechanism and kinetics.
机译:假设:二氧化硅和聚(乙烯氧化物)(PEO)的水性混合物,被称为“摇凝胶”,因为当受到施加的力时形成可逆凝胶,例如摇动。 可以使用流变仪观察这种剪切增稠效果,通过不同的且突然的材料粘度的增加。 定性地表明,在这种情况发生之前经过的时间,称为凝胶化时间,这取决于所用条件。 本文报告了对聚合物浓度,剪切速率和温度对凝胶时间的影响的系统研究,以量化变量与凝胶化机制和动力学之间存在的任何关系。

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