Chapter 21. Dispersions, Emulsions, and Foams
There is no generic technical term common to these different subtopics. The admittedly clumsy term small scale heterogenic materials
created by the author would not be adequate as a title for this chapter. Some authors use the term dispersion as a generic term that includes emulsions, c.f., Table 21.1
. There is a difference between these three systems, however, depending on the size of the particle. If the particle size is in the range of one molecule, the dispersion is a solution. Between a nanometer and a micrometer, the particles are colloid-like, and above this range we are dealing with a suspension.