ABSTRACT
Emulsions are found in nature, such as in milk or plant saps, but most emulsions are available as man-made vehicles for a large variety of products, often prepared according to some recipe and production method empirically developed a long time ago for a specic application. Typical emulsions include the following: a viscoplastic oil-in-water (O/W) mayonnaise dressing with a high content of triglyceride oils, a viscous cold cream of the water-in-oil (W/O) type with very small water droplets in parafn or polar oil, a bimodal drop size distribution O/W emulsion to transport heavy crude oil over long distances, a water-in-oil-in-water (W/O/W) multiple emulsion for controlled drug release
18.1 Introduction: Many Cases of Emulsion and a Large Quantity of Available Information .... 459 18.2 The Key Driving Force for Progress: Conceptualization of Physicochemical
Formulation .......................................................................................................................... 462 18.3 General Phenomenological Guidelines Concerning Emulsion Properties ........................... 467
18.3.1 Emulsion Type or Morphology ................................................................................. 467 18.3.2 Emulsion Stability/Persistence .................................................................................469 18.3.3 Emulsion Drop Size .................................................................................................. 472 18.3.4 Emulsion Viscosity and Rheology ............................................................................ 473 18.3.5 Formation of Structural Assemblies in the Emulsion External Phase ..................... 474
18.4 Current Situation................................................................................................................... 476 18.5 Prospects for the Near Future ............................................................................................... 478
18.5.1 Prospective Topics .................................................................................................... 478 18.5.2 Prospective Organization and Computerized Help to the Formulator .....................480
