Abstract
The effect of polyvinylpyrrolidone (PVP) on stability, rheological, electrokinetic and electrophysical properties of aqueous dispersions of A-300 pyrogenic silica was studied. The suspensions were shown to be most stable at PVP concentrations in the range from 0.12 to 0.24 wt % that was provided by structure-related mechanical factors. In the presence of PVP, the value of ζ-potential decreases, the ac conductivity increases, and rheological properties vary similarly to variations of oxide dispersity.
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Goncharuk, E.V., Pakhovchishin, S.V., Zarko, V.I. et al. Properties of Aqueous Suspensions of Highly Dispersed Silica in the Presence of Polyvinylpyrrolidone. Colloid Journal 63, 283–289 (2001). https://doi.org/10.1023/A:1016635908724
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DOI: https://doi.org/10.1023/A:1016635908724