抄録
On studying phenomena relating to emulsification, it becomes necessary to study on intermolecular forces between emulsifier and oil or water.
On this view point, it was found that there exists, at a given oil/water system, required HLB value for interfacial viscosity as well the required HLB value for emulsification, and also there exists linear correlation between required HLB value for interfacial viscosity and solubility parameter of oil.
The empirical equations to determine required HLB value for interfacial viscosity at a given oil/water interface were deduced experimentally as follows;
Y=6.146δ0-46.0
or Y=127.3logδ0-112.2
where Y=required HLB value for interfacial viscosity, and δ0=solubility parameter of oil.
Above empirical equations are both applicable in the range of Y=515 (corresponding to δ0=8.310.0) independent of the kind of emulsifiers (at least, in the case of nonionic emulsifiers).
Required HLB value for interfacial viscosity (now this value may be calculated only from δ0 value for a given oil), as well required HLB value for emulsification, may be useful for determination of HLB value of a given surfactant experimentally.
In the course of this study, the author found that heat of vaporization (accordingly δ0 value) may be calculated by the following empirical relation;
ΔHv (T') =ΔHv (T0) √T0/T'
where T', T0 are absolute temperature and ΔHv (T') , ΔHv (T0) are heat of vaporization at T' and T0 respectively.
