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What Do You Know about Emulsifiers

Views: 0     Author: Site Editor     Publish Time: 2024-08-19      Origin: Site

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Emulsifier is a surfactant that can stabilize the emulsion. Therefore, after the emulsifier is added to the oil-water system, the water and the oil can mix with each other to form a completely dispersed emulsion. Emulsifiers can not only improve the stability of the emulsion, but also determine the type of emulsion.

The hydrophilicity and lipophilicity of emulsifiers are generally unbalanced, and their application occasions are also different. If the hydrophilic group of the emulsifier molecule is larger and stronger than the oilophilic group, it is a hydrophilic emulsifier, and it is easy to form oil-in-water (O/W) emulsion; On the contrary, if the oleophilic group of the emulsifier molecule is larger and stronger than the hydrophilic group, it is an oleophilic emulsifier, and it is easy to form water-in-oil (W/O) emulsion. In general, hydrophilic emulsifiers are suitable for O/W emulsions, and lipophilic emulsifiers are suitable for W/O emulsions.

Generally, the "hydrophilic lipophilic balance value" (i.e. HLB) can be used to indicate the difference in emulsification capacity. The larger the HLB, the greater the hydrophilic effect, and the oil-in-water emulsion can be stabilized. On the contrary, the smaller the HLB, the greater the lipophilic effect, which can stabilize the water-in-oil emulsion.

According to the different structure and properties of emulsifiers, emulsifiers can be divided into anionic, cationic and non-ionic types. According to its source, it can be divided into natural emulsifier and synthetic emulsifier. According to the action type, it can be divided into surfactants, viscosity enhancers and solid adsorbents. According to its oil - and hydrophilic properties, it can be divided into oil - and hydrophilic types.

Emulsifier O is a non-ionic surfactant, which is easily soluble in oils and organic solvents. It can be used as W/O emulsifier, chemical fiber softener and silk aftertreatment agent.


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