Coalescence

Coalescence is the process whereby two or more liquid droplets merge together to form a single larger droplet (Figure 7.16). It is the principal mechanism by which an emulsion moves toward its most thermodynamically stable state because it involves a decrease in the contact area between the oil and water phases (Section 7.2). Coalescence causes emulsion droplets to cream or sediment more rapidly because of the increase in their size. In oil-in-water

FIGURE 7.16 Droplet coalescence eventually leads to the complete separation of the oil and aqueous phases.

emulsions, coalescence eventually leads to the formation of a layer of oil on top of the material, which is referred to as oiling off. In water-in-oil emulsions, it leads to the accumulation of water at the bottom of the material. For these reasons, an understanding of the factors which influence coalescence is important to food manufacturers attempting to create products with extended shelf lives.

Was this article helpful?

0 0
Atkins Low Carb Diet Recipes

Atkins Low Carb Diet Recipes

The Atkins Diet is here. Dr Atkins is known for his great low carb diets. Excluding, Dr Atkins carb counter and Dr Atkins New Diet Revolution.

Get My Free Ebook


Post a comment