This paper overviews silica suspensions in water-immiscible liquids, with an emphasis on their dispersion stability and rheological properties as a function of the surface characteristics of silica powders at lower silica volume fractions, ϕ, than 0.1. In addition, a critical review is presented the manufacturing process of silica powder by considering their microstructures. Hydrophilic fumed silica powders are in a gel state at lower ϕ than hydrophobic fumed silica powders in water-immiscible liquids. The interaction between the surface silanol groups is dominant in the former; whereas in the latter, the mutual interaction between the surface hydrophobic moieties and the dispersion media is favored. Moreover, the dynamic moduli of the hydrophobic fumed silica suspensions strongly depend on the mutual interaction between the hydrophobic moieties and the dispersion media. Their magnitudes become larger as mutual interactions increase. In addition, the effects of the adsorption of polymers and non-adsorbing polymers on the dispersion stability and rheological behavior of hydrophilic or hydrophobic fumed silica suspensions are discussed, by considering their small-angle neutron scattering (SANS) curves. The precipitated silica suspensions are more compact and form smaller microstructures than the fumed silica suspensions and their gels correspond to the weak-link gel

本文概述的二氧化硅悬浮液在与水不混溶的液体，具有强调它们的分散稳定性和流变性质如在较低的硅石体积分数的二氧化硅粉末的表面特性的函数φ，大于0.1。另外，通过考虑二氧化硅粉末的微观结构，对二氧化硅粉末的制造工艺进行了严格的审查。亲水性气相二氧化硅粉末在较低ϕ时呈凝胶态与不溶于水的液体中的疏水性气相法二氧化硅粉相比。表面硅烷醇基团之间的相互作用在前者中占主导地位。而在后者中，表面疏水性部分和分散介质之间的相互作用是有利的。此外，疏水性气相二氧化硅悬浮液的动态模量强烈取决于疏水性部分与分散介质之间的相互作用。随着相互互动的增加，它们的数量级也会变大。另外，通过考虑它们的小角中子散射（SANS）曲线，讨论了聚合物和非吸附性聚合物的吸附对亲水性或疏水性气相二氧化硅悬浮液的分散稳定性和流变行为的影响。