Emulsification
EMULSION
An emulsion is a mixture of two or more liquids that are normally immiscible ( non mixable). Emulsions are part of a more general class of two-phase systems of matter called colloids. Although the terms colloid and emulsion are sometimes used interchangeably, emulsion should be used when both the dispersed and the continuous phase are liquids. In an emulsion, one liquid (the dispersed phase) is dispersed in the other (the continuous phase). Examples of emulsions include milk, mayonnaise and some cutting fluid for metal working. The photo-sensitive side of photographic film is an example of a colloid. The word "emulsion" comes from the Latin word for "to milk", as milk is an emulsion of milk fat and water, among other components.
Two liquids can form different types of emulsions. As an example, oil and water can form, firstly, an oil-in-water emulsion, where the oil is the dispersed phase, and water is the dispersion medium. Secondly, they can form a water-in-oil emulsion, where water is the dispersed phase and oil is the external phase. Multiple emulsions are also possible, including a "water-in-oil-in-water" emulsion and an "oil-in-water-in-oil" emulsion.
Preparation of Water in Oil Emulsion
Materials required :
• 10 ml of Vegetable Oil
• 2 gm of Bee wax
• 8 ml of water
PROCEDURE : Take the oil and bee wax in a dish and heat them both until the wax melts at 65 degree centigrade. Heat the water to 70 degree centigrade. Add the water to the oil wax solution with continued stirring. After a few minutes we can notice that the oil and water mix together and is present as a uniform transparent liquid. The bee wax is the emulsifying agent which helps the water and oil mix together which are otherwise immiscible.
Preparation of Oil in Water Emulsion
Materials Required :
• 1 gm of soap
• 10 ml of water
• 5ml of kerosene
PROCEDURE : Heat the soap with water at 70 degree centigrade. Add the kerosene to the soap with water
An emulsion is a mixture of two or more liquids that are normally immiscible ( non mixable). Emulsions are part of a more general class of two-phase systems of matter called colloids. Although the terms colloid and emulsion are sometimes used interchangeably, emulsion should be used when both the dispersed and the continuous phase are liquids. In an emulsion, one liquid (the dispersed phase) is dispersed in the other (the continuous phase). Examples of emulsions include milk, mayonnaise and some cutting fluid for metal working. The photo-sensitive side of photographic film is an example of a colloid. The word "emulsion" comes from the Latin word for "to milk", as milk is an emulsion of milk fat and water, among other components.
Two liquids can form different types of emulsions. As an example, oil and water can form, firstly, an oil-in-water emulsion, where the oil is the dispersed phase, and water is the dispersion medium. Secondly, they can form a water-in-oil emulsion, where water is the dispersed phase and oil is the external phase. Multiple emulsions are also possible, including a "water-in-oil-in-water" emulsion and an "oil-in-water-in-oil" emulsion.
Preparation of Water in Oil Emulsion
Materials required :
• 10 ml of Vegetable Oil
• 2 gm of Bee wax
• 8 ml of water
PROCEDURE : Take the oil and bee wax in a dish and heat them both until the wax melts at 65 degree centigrade. Heat the water to 70 degree centigrade. Add the water to the oil wax solution with continued stirring. After a few minutes we can notice that the oil and water mix together and is present as a uniform transparent liquid. The bee wax is the emulsifying agent which helps the water and oil mix together which are otherwise immiscible.
Preparation of Oil in Water Emulsion
Materials Required :
• 1 gm of soap
• 10 ml of water
• 5ml of kerosene
PROCEDURE : Heat the soap with water at 70 degree centigrade. Add the kerosene to the soap with water