Use of modified starch
What is modified starch? Starch is a commonly used food in daily life, and its variety is common, such as corn starch, tapioca starch, sweet potato starch, potato starch and modified starch. So what is modified starch? What is the use of modified starch? What is the performance? I believe many people want to know, let's take a look at the following article.
What is modified starch?
On the basis of the inherent characteristics of natural starch, in order to improve the performance of starch, expand its application range, use physical, chemical or enzymatic treatment to introduce new functional groups on starch molecules or change the size of starch molecules and the properties of starch granules. Thereby changing the natural characteristics of starch (such as: gelatinization temperature, thermal viscosity and stability, freeze-thaw stability, gel strength, film formation, transparency, etc.), making it more suitable for certain application requirements. This type of starch, which has been subjected to secondary processing and changed properties, is collectively referred to as modified starch.
Use of modified starch
Use 1. Paper industry, modified starch is the main auxiliary material for surface sizing and coating. It is also used as an internal additive and paperboard interlayer adhesive to increase the strength, smoothness, stiffness and wear resistance of the paper. Properties and retention of fillers give paper and board good physical and surface properties.
Use 2, textile industry, modified starch for warp sizing, printing and dyeing, finishing processing and non-woven fabric composite products, can obtain a smooth, stiff, thick, plump and other comprehensive feelings, so that the feel is greatly improved. Textile pulp used to be mainly chemical pulp, which was gradually replaced by modified starch due to environmental pollution.
Use 3, the food industry, the use of modified starch is more and more widely, there are more than 100 kinds of edible modified starch as a thickener, stabilizer, water retention agent, gelling agent, adhesive, anti-adhesive agent, polishing agent , puffing agents, etc., used in canned food, meat products, dairy products, confectionery, cakes, instant noodles, condiments, cold food, beverages and other food processing.
Use 4. Aquatic feed industry, modified starch is mainly used as feed binder for carp, water fish, etc., and its dosage is about 25 for feed. In recent years, China's aquatic feeds consume about 400,000 tons per year, and need to be modified starch-pregelatinized starch 100,000 tons, of which about two-thirds rely on imports. The quality of pre-gelatinized starch produced from tapioca starch is much better than that produced with corn starch. The cassava pre-gelatinized starch has strong market competitiveness.
Use 5, building materials industry, modified starch is mainly used as a binder for wallless structural panels, interior wall decoration adhesives, lightweight ceiling adhesives, etc. With the rise of new building materials, the application of modified starch in the building materials industry has become more and more widespread. It is estimated that by 2010, the domestic modified starch for building materials will reach more than 100,000 tons.
Uses 6. In the petroleum industry, modified starch is mainly used as a fluid loss additive, a fracturing fluid thickener, a demulsifier, and the like. It is estimated that by 2010, the petroleum industry will reach 50,000 tons of modified starch.
Uses 7. In the pharmaceutical industry, modified starch can be used as a diluent, absorbent, binder, wetting agent, disintegrating agent, and the like. Only disintegrants consume 15,000 tons of modified starch per year and are expected to reach 30,000 tons by 2010. In addition, the application of modified starch in clinical medicine is also extensive.
In addition to the above-mentioned industrial sectors, the use of modified starch in industries such as foundry, ceramics, household chemicals, and industrial wastewater treatment is also increasing, and the potential market is large.
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