物理化学学报2008，Vol.24Issue(3)：433-436,4.
SiO2/PEG分散体系动态剪切流变行为
Rheological Behaviors of SiO2/PEG Suspension under Dynamic Shear
摘要
Abstract
Fumed silica suspensions in polyethylene glycol(PEG200)exhibited shear-thickening behavior under dynamic oscillatory strain amplitude.Two regimes of shear-thickening behavior were obtained:the first occurred at critical strain amplitude γc and different constant frequencies,and the second occurred at critical frequency and constant strainamplitude γo=500%.For the fast,the relationships ofboth of the moduli(G'and G″)versus strain amplitude were investigated.The strain amplitude as a function of difierent constant frequencies Was observed.In the linear viscoelastic region,the storage(G′)and the loss((G″)moduli depended strongly on frequency with the power-law:G′∝ ω0.57,G″∝0.7.In the second regime,the moduli(G′and G″)and complex viscosity η* showed strong dependence on frequency.The behaviors could be qualitatively explained using the cluster theory,which attributed the phenomena to the formation of metastable.flow induced clusters.关键词
雾化二氧化硅分散体系/剪切增稠/储能模量/耗能模量/频率Key words
Fumed silica suspensions/Shear-thickening/Storage modulus/Loss modulus/Frequency分类
化学化工引用本文复制引用
杨海林,阮建明,伍秋美,周忠诚,邹俭鹏..SiO2/PEG分散体系动态剪切流变行为[J].物理化学学报,2008,24(3):433-436,4.基金项目
国家自然科学基金(50604017)资助项目 （50604017）
