Knowledge of pregelatinized starch
Pregelatinized starch is a kind of starch that has been pregelatinized, which has good water-soluble, viscous and film-forming properties, and is widely used in food, pharmaceutical, cosmetic, feed and textile fields. In this paper, the preparation, properties and applications of pregelatinized starch will be introduced in detail.
1. Preparation of pregelatinized starch.
The preparation methods of pregelatinized starch mainly include dry method and wet method. Dry preparation is to make starch powder by drying, crushing, sieving and other processes, and then add an appropriate amount of water and stir evenly, heat to the gelatinization temperature, so that the starch granules undergo gelatinization reaction, so as to obtain pregelatinized starch. In wet preparation, the starch is fully stirred in an appropriate amount of water, then heated to the gelatinization temperature to make the starch granules gelatinize, and finally the gelatinization liquid is filtered, washed and dried to obtain pregelatinized starch.
2. Properties of pregelatinized starch.
Pregelatinized starch has the following properties:
1.Water solubility: Pregelatinized starch has good water solubility, can be quickly dissolved in cold water, and does not produce agglomeration or precipitation.
2.Viscosity: Pregelatinized starch has high viscosity and is able to exhibit good adhesion properties at low concentrations, while having high viscosity stability.
3.Film-forming: Pregelatinized starch has good film-forming properties and can be used as coating materials in food, medicine and other fields.
4.Stability: Pregelatinized starch has good stability and can maintain stability under high temperature, acid and alkali conditions.
3. Application of pregelatinized starch.
Pregelatinized starch is widely used in food, pharmaceutical, cosmetic, feed and textile fields. In the food field, pregelatinized starch can be added to food as a thickener, stabilizer, gelling agent, etc., such as candy, pastry, ice cream, etc.; In the pharmaceutical field, pregelatinized starch can be used as pharmaceutical excipients, tablet matrices, etc.; In the field of cosmetics, pregelatinized starch can be used as a humectant, thickener, etc.; In the field of feed, pregelatinized starch can be used as a feed additive to improve the nutritional value and palatability of feed; In the textile sector, pregelatinized starch can be used as a slurry, coating agent, etc.
Fourth, summary. As an important food additive and industrial raw material, pregelatinized starch has a wide range of application prospects. Knowledge of the preparation, properties and applications of pregelatinized starch is of great significance for making better use of its properties and playing its role in various fields. With the continuous progress of science and technology and the growing application demand, the application prospect of pregelatinized starch will be broader.