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Evaluation of the Physical Stability of Zinc Oxide Suspensions Containing Sodium Poly-(acrylate) and Sodium Dodecylsulfate

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Academic year: 2021

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Figure 1 shows that the initial pH of our suspensions ranges between 8 and 9, because of neutralization with  con-centrated NaOH and does not vary significantly versus time
FIG. 2. Typical strain sweep profiles for different formulations. (a) determination of the linear viscoelastic domain: effect of PAA (a1), (a2) and SDS concentrations (a1), (a3)
Figure 6 shows a typical particle size distribution (PSD) measured, after 5 days of storage, by the light scattering technique with the MasterSizer 2000 in dry medium for the ZnO powder and in dilute medium for the ‘‘pure’’  sus-pension (5% ZnO) and the va
FIG. 4. Flow curves after 5 days of storage, of: (a), (b), and (c) sodium polyacrylate solutions; (d), (e), and (f) the different formulations
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