Posts Tagged "emulsifier"

July 28, 2021

Find out Interesting Facts About Emulsifier

by M_R_Radmin
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Blog, , ,

Emulsifier          

What is Emulsifier (Emulsifying Agents)

Emulsifiers are ingredients that can be found in the naturally, which own the ability to improve food system stability. It is a resourceful technical ingredient that helps food products to achieve the desired specifications, and thus reducing consumers’ misconception about chemical ingredients used in food.

Foaming is one of emulsifier’s best properties whereby when a solution is mixed with the emulsifier added, the foam produced through the agitation is being coated by the emulsifier, making the bubbles long lasting and the product more stable. Emulsifier promotes the process that requires more aeration to foam easily, stabilizing the foam, providing a batter with smooth texture and a greater volume.

Rise in volume of the product is essential for aerated food. For example, cake gels are one of the recently new type of ingredient found in cake production, which plays a major role in increasing the volume through easy-foaming, incorporated air bubbles become stable the in the batter, yielding cakes with a soft, white and light texture with great height. Ingredient is usually added to make sponge cakes either vanilla or chocolate to achieve easy-to-foam batter with a good volume and great texture.

Oil and water are two unmixable liquid to put together, you’ll see a clear separation between the two. When mixture is being shaken vigorously, a diffusion of droplets of oil and water can be seen but it will sooner or later no matter how. Emulsifiers have the capability to keep the oil and water together, so that the emulsified mixture for instance, sauces and mayonnaise will continue to remain smooth and creamy without having water being barred out from the food system. This increases the water-holding ability of cakes whereby it can retain moisture in food systems, improving the overall properties and texture of the cakes.

Baking emulsifiers have become a very important class of ingredients in the making of cakes and other sweet foods as cake baking has become a more defined industrial activity.

A food emulsifier, also known as an emulgent, is a surface-active chemical that forms a barrier between two immiscible liquids like oil and water, allowing them to be mixed into stable emulsions. Emulsifiers also help to minimize stickiness, crystallization, and separation.

Emulsifiers produce one of two types of emulsions: oil droplets distributed in water or water droplets dispersed in oil. There is a continuous and distributed phase within the emulsion. The continuous phase in an oil-in-water emulsion is the water, and the dispersed phase is the oil; in a water-in-oil emulsion, the oil is the continuous phase.

Properties of Emulsifying Agents

Water-soluble hydrophilic parts and water-insoluble, oil-soluble lipophilic parts make up an emulsifier. When an emulsifier is added to a mixture of water and oil, it forms a layer on the interface that anchors the hydrophilic part of the emulsifier to the water and the lipophilic part to the oil.

The hydrophilic and lipophilic parts of the contact surface of water and air, as well as oil and air, are absorbed and organized around the interface. The emulsifier lowers the interfacial tension, which weakens the force that separates oil and water, allowing oil and water to mix more easily.

There are multiple significant properties of emulsifiers which are applicable in many foods.

  • Emulsifier act as Surface Active Agent

Surface tension, a force that reduces the surface area of a water droplet in the air, works on the water’s surface, resulting in spherical water droplets.

When water and oil are present in a container, they do not mix and separate into two layers even after stirring. The interface is the point where two immiscible substances come into contact.

Interfacial Tension is a type of surface tension that acts on the interface to separate the two substances.

Emulsifier Agents can help to lower interfacial tension and bring two immiscible liquids together. The force needed to separate the two substances grows stronger as interfacial tension rises.

Surfacant reduces interfacial tension and alters an interface’s characteristics.

  • HLB

Emulsifiers differ in their hydrophilicity and lipophilicity, and the balance between them is known as the HLB Value. The HLB value ranges between 0 and 20.

The HLB of an emulsifier with higher lipophilicity is lower, whereas the HLB of an emulsifier with higher hydrophilicity is higher, and the HLB determines how the emulsifier behaves and operates in water.

Emulsifiers aren’t usually utilized with chemicals that have hydrophilic and lipophilic portions. When the hydrophilicity of a chemical is too high, it disperses in water, whereas compounds with a high lipophilicity disperse in oil. The emulsifier’s effects are sufficient when Hydrophilicity and Lipophilicity are well-balanced.

  • Micelle

Because an emulsifier has hydrophilic and lipophilic qualities, its solution does not form a simple aqueous solution, but rather a colloidal solution with properties that vary dramatically depending on its concentration.

  • Solubilization

A semi-transparent solution is created when a little amount of insoluble material is mixed into an emulsifier micelle. Solubilization is the term for this phenomenon.

Solid Monoglyceride has a high crystallization capability, which has an impact on its performance. It also produces a liquid crystal with properties that are halfway between solid crystal and liquid.

Uses of Emulsifier

  1. Improving oil distribution in water dispersions and stabilizing the emulsion that results.
  2. Optimizing air distribution and foam stabilization.
  3. Imparting a consistent and fine crumb structure by optimizing internal features.
  4. Improving the cake’s softness and extending its shelf life.
  5. Improving the creation of low-fat products.
  6. Increasing the usage of liquid oils with reduced trans fatty acid content.

Types of Emulsion

There are four types of Emulsions

  • Oil in Water Emulsion
  • Water in Oil Emulsion
  • Water in Oil in Water Emulsion
  • Oil in Water in Oil Emulsion

Let us now try to understand each one of this in a detailed manner.

  • Oil in Water Emulsion

Oil droplets are suspended in an aqueous continuous phase in an Oil-in-Water (O/W) Emulsion. These are the most adaptable emulsions; they come in a variety of forms (mayonnaises, cream liqueurs, creamers, whippable toppings, ice cream mixes), and their qualities may be adjusted by changing the surfactants used as well as the components present in the aqueous phase.

  • Water in Oil Emulsion

W/O (Water-in-Oil) Butter, margarines, and fat-based spreads are all examples of emulsions. These rely on the properties of the fat or oil and the surfactant utilized for stability rather than the qualities of the aqueous phase, therefore there are fewer parameters that can be changed to regulate their stability.

  • Water in Oil in Water Emulsion

The water-in-oil-in-water (w/o/w) emulsion is the third form of emulsion. Because the water droplets included in the oil droplets, as well as the oil droplets contained in the continuous aqueous phase, must be stable, these are the most complex emulsions to manufacture and control.

  • Oil in Water in Oil Emulsion

The fourth form of emulsion is an oil-in-water-in-oil emulsion, which is a double emulsion system with an oil-in-water (o/w) emulsion as the dispersed phase and an oil or polymeric fat as the continuous phase. The o/w/o emulsions have received relatively little research due to their restricted use in food products.

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