How to choose the right emulsifier for cosmetics?

How Do Emulsifiers in Cosmetics Work?

Emulsifiers work by lowering the interfacial tension between water and oil phases, allowing them to form a stable mixture. Emulsifiers contain both hydrophilic and lipophilic properties, allowing them to orient themselves at the oil-water interface and prevent phase separation. This ensures the longevity of the emulsion and enhances its stability.

Emulsifier stabilization of mixtures can be achieved through a variety of mechanisms, including O/W Emulsification, W/O Emulsification, formation of micelles, and electrostatic repulsion.

Classification of Emulsifiers

• Liquid Crystal Emulsifiers

Liquid crystal emulsifiers are designed to mimic the structure of the skin's natural lipid bilayers, offering enhanced compatibility and improved delivery of active ingredients. Lecithin is a representative liquid crystal emulsifier.

Types of Emulsification Systems

Emulsifiers can be classified based on the type of emulsion system they create. The main types of emulsification systems include:

• O/W Emulsions (Oil-in-Water)

In O/W emulsions, oil is dispersed in water. This type of emulsion is lightweight and easily absorbed by the skin, making it ideal for lotions and moisturizers.

• W/O Emulsions (Water-in-Oil)

In W/O emulsions, water is dispersed in oil. This type of emulsion is typically more occlusive and provides longer-lasting hydration, making it suitable for creams and ointments.

• Multiple Emulsions

Multiple emulsions contain both oil-in-water and water-in-oil phases, offering unique benefits such as enhanced moisturization and stability.

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How to choose the right emulsifier for cosmetics?

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