Q
how to dissolve zinc oxide in oil in water emulsion
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Dissolving Zinc Oxide (ZnO) directly in an oil-in-water (O/W) emulsion can be challenging since ZnO is insoluble in both oil and water under normal conditions. To incorporate ZnO into an O/W emulsion, first, disperse the ZnO in the oil phase. Use a suitable surfactant or dispersant to stabilize the ZnO particles in the oil. The surfactant helps to prevent the zinc oxide particles from aggregating, making them more evenly distributed. Thereafter, slowly add the oil phase containing the dispersed ZnO into the water phase under high-shear mixing to ensure a fine dispersion of the oil droplets in the water, forming a stable emulsion. It's crucial to choose emulsifiers that are compatible with ZnO and can form stable emulsions. Adjusting the pH of the water phase can also aid in stabilizing the emulsion and ensuring the zinc oxide remains well dispersed.
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