Acetüülsed

Acetüülsed, also known as acetylated starches, are a type of modified starch that has been chemically treated to introduce acetyl groups onto the starch molecules. This process enhances the starch's properties, making it more resistant to retrogradation, which is the process by which starch molecules reorganize into a more crystalline structure after cooking and cooling. Acetylated starches are commonly used in the food industry as thickeners, stabilizers, and emulsifiers.

The acetylation process involves reacting starch with acetic anhydride in the presence of a catalyst, typically sodium hydroxide. This reaction results in the substitution of hydroxyl groups on the starch molecules with acetyl groups. The degree of substitution, which refers to the number of acetyl groups introduced per starch molecule, can be controlled to achieve the desired properties.

Acetylated starches offer several advantages over native starches. They have improved water solubility, which allows them to form stable gels and emulsions. They also exhibit enhanced resistance to retrogradation, maintaining their functional properties over extended periods. Additionally, acetylated starches can improve the texture and mouthfeel of food products, providing a smoother and more cohesive mouthfeel.

Acetylated starches are widely used in various food applications, including sauces, dressings, and baked goods. They are also used in non-food applications, such as in pharmaceuticals and cosmetics, where their stabilizing and emulsifying properties are beneficial. The versatility and functional properties of acetylated starches make them a valuable ingredient in many industries.