In some soap stabilized liquid paraffin emulsions a correlation has been found between emulsion type and the contact angle of the soap gel (the stabilizing agent) at the o/w interface. Two unrelated series of emulsions have been prepared, one series being stabilized by magnesium oleate gels and the other series by ammonium oleate gels. The soap gels were prepared by double decomposition and suppression of ionization respectively. Unlike the magnesium oleate system no inversion to w/o emulsions occurred with the ammonium oleate series. This dissimilarity is predicted from differences in the contact angles of the soap gels at the o/w interface.
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Pickett et al. (1976) studied this question.
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