Colloid Mills

A colloid mill is a device used in the preparation of emulsions and dispersions. The name implies that it can generate colloidal size droplets (1-1,000 nm) for the disperse phase, but in reality the colloid mill produces emulsions with droplets in the size range of 1 to 25 fim. It is sometimes used for dispersing solid particulates throughout the continuous phase, but in most cases it does not grind particles, rather it deagglomerates and disperses the solids. In the early years of the colloid mill, one author suggested that it be called a dispersion mill to reflect its function better (1). However, the term colloid mill is still used to describe this type of device.

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