What is phase inversion in emulsion ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Emulsions**: Emulsions are mixtures of two immiscible liquids, typically oil and water. They can be classified into two main types: oil-in-water (O/W) emulsions, where oil droplets are dispersed in water, and water-in-oil (W/O) emulsions, where water droplets are dispersed in oil.

2. **Definition of Phase Inversion**: Phase inversion in emulsions refers to the process of interconversion between these two types of emulsions (O/W and W/O). This means that an emulsion can change from one type to the other under certain conditions.

3. **Mechanism of Phase Inversion**: The phase inversion can occur due to various factors, such as changes in temperature, concentration of the emulsifier, or the presence of additional substances. One key factor is the shifting of the emulsifier's affinity from one phase to another.

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