以聚乙二醇400为分散介质，高纯球形硅微粉为分散相，气相白炭黑M-5为添加剂，采用球磨法制备了颗粒含量不同的剪切增稠液(STF)，研究了高纯球形硅微粉和气相白炭黑含量对其流变性能的影响，并修正了剪切增稠段的黏度公式。结果表明：高纯球形硅微粉的含量越高， STF的剪切增稠效应越明显；气相白炭黑可以显著改善 STF 的剪切增稠效应，通过改变其加入量，可以实现STF剪切增稠效应由连续性向非连续性过渡；通过拟合试验数据得到的修正剪切增稠段黏度模型与试验数据吻合得很好。
Taking polyethylene glycol 400 as dispersion medium,high purity spherical silica powder as dispersion phase and fumed silica M-5 as additive,shear thickening fluid (STF)containing different contents of particles were prepared by ball-milling method.Effects of high purity spherical silica podwer and fumed silica on the rheological properties of STF were investigated,and a modified viscosity model for shear thickening section was proposed.The results demonstrate that the shear stiffening effect of STF enhanced with the increase of spherical silica powder contents;fumed silica can significantly improve the shear thickening effect of STF,and adj usting the content of fumed silica can realize the STF from continuity to discontinuity.Besides,through fitting experimental data,the modified viscosity model for shear thickening section agrees well with experimental data.
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