(W/O) /W エマルジョンにおける水透過

概要

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Water permeation through oil layers of kerosene containing Span 80 was studied in water-in- oil- in water ((W/O) /W) emulsions under suppression of entrainment due to emulsification of the outer aqueous phase and of mechanical breakdown of (W/O) droplets. Water permeabilities Po were determined from the time-dependent change of water content the value of Po for permeation from the inner to the outer aqueous phase was found to be 0.7 × 10-5cm/s for NaCl solution system at a Span 80 content of 3 wt%. For the H2SO4 solution system, however, Po was affected by the concentration difference. On the other hand, the presence of NaCl or H2SO4 in the aqueous phase has little effect on the solubility of water in Span 80-kerosene solution. This suggests that it is not valid to interpret water permeation through the thin oil layer in terms of solubilization.