PREPARATION OF MONODISPERSED O/W EMULSION BY POROUS-GLASS MEMBRANE

Although high - pressure homogenizers and ultrasonic homogenizers are commonly used in the commercial production of various emulsions, it is rare to obtain monodispersed emulsion or conveniently control particle size according to each practical target. The authors recently found a novel emulsification which might be able to solve this problems by application of porous glass membrane as liquid disperser. Present experiments were carried out from the standpoint of basic investigation in order to clarify relations between pore characteristics of membrane and emulsion particles obtained thereby. Porous glass membrane from phase separation was superior to other porous membranes such as porous ceramic as disperser. The following conditions were always necessary for preparation of monodispersed emulsion. (1) The porous membrane must have a narrow pore size distribution. (2) The membrane should never be wetted with dispersion liquid phase.