Question

Pls explain emulsification in your words

Answer 1

Explanation:

Emulsify is a force

between 2 immiscible(means which can't dissolve like oil and water) liquids

Answer 2

Answer:

✯What is emulsification?

Emulsification is the formation of emulsions from two immiscible liquid phases is probably the most versatile property of surface-active agents for practical applications and, as a result, has been extensively studied.

✯Some Examples of Emulsions:

• Egg yolk – contains the emulsifying agent lecithin

• Butter – water in the fat emulsion.

• Mayonnaise – an emulsion of oil in water.

• Crema on espresso – an emulsion of water and coffee oil.

✯Emulsifier

• An emulsifier is a substance that stabilizes an emulsion. It is also called emulgent. Surfactants such as detergents are one type of emulsifier. Surfactants are also referred to as surface-active agents.

• Some examples of emulsifiers are lecithin, soy lecithin, diacetyl tartaric acid ester of mono glyceride, Mustard, sodium stearoyl lactylate, and sodium phosphates.

✯Aims of Emulsification

The emulsification unit operation has three specific aims. First, it has to ensure the physicochemical stability of the product. Emulsification determines the characteristic structure of the batter which greatly influences fat and moisture separation from the product during cooking.

Second, it creates a typical sensory property such as appearance, texture, flavour or noise. Finely comminuted products are defined by their smooth surface.

✯Emulsification Process:

Some mechanisms involved in emulsification are discussed below.

• According to surface tension theory, emulsification is carried out by reducing the interfacial tension between the two phases.

• According to the repulsion theory, a film is created over one phase by the emulsifying agent. The film forms globules, that repel each other. This is their cause for suspension in the dispersion medium.

• Viscosity modification – Some emulgents like acacia, glycerine, and carboxymethyl cellulose, increase the viscosity of the medium. This helps in maintaining and creating the suspension of globules of the dispersed phase.

✯Emulsion Uses:

• Usually used in cosmetics, pharmaceuticals, personal hygiene.

• Microemulsions are used to deliver vaccines to kill various microbes.

• It is used in chemical synthesis.

• It is used in firefighting.

• Nanoemulsions such as soybean oil are used to kill microbes.

• Mayonnaise is an oil in water emulsion with egg yolk or sodium stearoyl lactylate.

EXPERIMENT

Role of emulsifying agents in stabilizing emulsions of oils

the procedure to perform an experiment to study the role of emulsifying agents in stabilizing the emulsions of different oils. This article will help you understand the procedure to conduct the experiment

Aim:

The aim of this experiment – Studying the role of emulsifying agents to stabilize the emulsions of different oils.

Theory:

• A colloid where the dispersion medium, as well as dispersed phase, are in liquid form it is called an emulsion. Here they are differentiated based on their relative amounts. Dispersed phase is present in smaller quantity whereas the dispersion medium is present in large proportion.

• Mix oil and water and shake the mixture. You can see a slight milky solution. It is unstable and is known as an emulsion of oil in water. When allowed standing, two layers are formed separating oil and water.

• To increase the stability of oil and water emulsion soap solution can be added. Soap solution is an emulsifying agent. The carboxyl polar group decreases the interfacial surface tension between the two layers. Optimum concentration is the soap concentration essential to complete emulsification process. Effective stabilization is not achieved if the amount is greater or less than optimum concentration.

Materials required:

The apparatus and materials required for this experiment are as follows:

• One test tube stand
• Stopwatch
• One glass rod
• Five droppers
• Detergent or soap 5 g
• Linseed oil, mustard oil, machine oil, and castor oil 10 mL each
• Six test tubes

Procedure:

• Take a test tube with 10 mL of distilled water and dissolve 1 g of detergent in it. Shake the test tube vigorously and label it as ‘A’.

• Take four test tubes and label them B, C, D and E. Add 5 mL distilled water in each test tube. Pour 10 drops of mustard oil in B, 10 drops of linseed oil in C, 10 drops of castor oil in D and 10 drops of machine oil in E.

• Take test tube B in your hand and shake it vigorously (for 5 minutes) and keep it in the test tube stand. Start the stopwatch to record the time taken to separate two layers.

• Follow the same procedure with the rest of the test tube’s viz, C, D and E.

• Add two drops of detergent or soap solution prepared in test tube A into each test tube. Shake the test tubes for 5 minutes each and record the time of separation.

Precautions to be taken during the experiment:

• Add equal amount of detergent solution to all the five test tubes.

• Shake all five test tubes for an identical time span to minimize the time recording error.

• Stop the stopwatch immediately when you see the layers separated and start it as soon as the shaking stops.