In the first stage (the amount of NaOH solution ≤ 0.43 vol.%, stirring time 5 min), the overall droplet size of the emulsion shows a decreasing trend, followed by an increasing trend with increasing NaOH solution amounts.
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Study on the Properties Changes of Reversible Invert Emulsion during the Process from O/W to W/O with Alkali.
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The sentences
It was found that in the stage where the amount of NaOH solution was less than 0.43 vol.%, there was no specific structure between the droplets of the O/W emulsion, and the overall droplet size of the emulsion showed a trend of first decreasing and then increasing.