作者：Guo-Dong Zhang, Ji-Rong Wu, Long-Cheng Tang, Jia-Yun Li, Guo-Qiao Lai, Ming-Qiang Zhong
關鍵字：composites; blends; structure; property relations
論文來源：期刊
具體來源：Journal of Applied Polymer Science
發(fā)表時間：2014年
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The structure and viscoelastic properties of fumed silica gels in low molecular weight hydroxyl silicone oil were investigated by
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means of steady and dynamic rheology. It is found that the fumed silica/hydroxyl silicone oil suspension exhibits shear-thickening
under steady shear and “strain-thickening” under oscillatory shear condition. Effects of hydroxy groups on the rheological behavior
of silicone oil suspension with highly dispersed hydrophilic amorphous silica were investigated by infrared, 1H-NMR, and rheological
test. The results show that the hydroxy groups on this system play an important role on the formation of shear thickening behavior
of the suspension solution. At the same particle diameter and mass fraction, the amount of hydroxy groups on this system has a
strong effect on increasing the viscosity of the suspension, which is likely due to multiassociation hydrogen bonding between liquid
molecules and silanol groups on fumed silica surfaces (SiAOH).
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