CHEE 4895

A colloid is a type of mixture where minute particles in the size range of 1-1000 nm stay suspended but distinct from, another phase. The minute substance is referred to as the colloidal particle, and it must not settle when left undisturbed. It is also referred to as the dispersed phase, with the substance holding the colloid is the continuous phase. The phases can be solid, liquid or gas. The fact that colloidal particles have such small dimensions is the reason that a huge surface (interfacial) area is created. Their high interfacial area is the reason why colloidal systems have special properties and also why we study colloids and interfaces together. Colloidal systems are used in a wide variety of industries including chemical manufacturing, food and consumer products, pharmaceuticals and environmental management.