About Chitosan

Chitosan is also known as acetyl chipper, which is obtained by a widely presence of natural boundaries, and the chemical name is polypexamine (1-4) -2-amino-B-D glucose.
Since 1859, the French Rouget first got chitosan, such natural polymer biofunction, blood compatibility, safety, microbial degradation, etc., excellent performance, etc. It has made significant progress in many fields such as medicine, food, chemical, cosmetics, water treatment, metal extraction and recovery, biochemical and biomedical engineering. For patients, the effect of chitosan blood fat and hypoglycemia has been studied.

Relationship with a beete

Chitosan is a product of a chitin-off N-acetyl group. In general, the N-acetyl is de removed from 55% or more, or the chitosan can be called chitosan, or can be in 1% acetic acid or 1% hydrochloric acid. Dissolve 1% deacetylated, which is referred to as chitosan. In fact, the N-deacetylatty is more than 55% or more, which can dissolve in this dilute acid. As the chitosan of the industrial product, N-deacety is more than 70%. N-deacetylation is 55% to 70% is a low deacetylacetan chitosan, 70% to 85% is medium deacetylantia chitosan, 85% to 95% is high-remodenating chitosan. , 95% to 100% is ultra-high deacetylated chitosan. N-deacetylacettylation 100% chitosan is extremely difficult to prepare. On each of the glycosyl groups of the chin, there may be N-acetyl groups, may not necessarily have N-acetyl, and the N-acetyl is 50% or less, which is called a beetle because it is certainly insoluble. The above concentrations of dilute acid.

Degradation degree

The degree of deacetyoyl is determined about the amount of amine content on the macromolecular chain, and DD increases, due to the amine substation, the chitosan is increased in the dilute acid solution, and the polymer decomposition charge density increases. Changes in its structure, nature, and performance, and research on the nature of chitosan dilute solutions have ignored the effects of DD values on equation. Vandum et al. Has studied the effects of different ionic strength on the molecular size and viscosity of chitosan in the dilute solution. As a result, the ion intensity varies to change the expansion of the random truncation to change the molecular size and characteristic viscosity, and the determination of the Mark-HOUWINK equation constant is performed by different D.d chitosan, and the results indicate that the K, A value changes with D.d value. Thus, the Mark-Houwink equation constant K, A is regularly dependent on the deacetyness of chitosan, and when the same molecular weight, the chitosan is molecular size, characteristic viscosity of the chitosan in the dilute solution with the increase of deacethane And expand factors, etc., while the characteristic ratio and spatial resistance are reduced as deacetylation increases. This can calculate the average molecular weight of any of the chitosan samples within the applicable range. The average molecular weight can be calculated by a relatively simple characteristic viscosity measurement.

Application

1, Cosmetics special chitosan
Cosmetic special chitosan has good moisture absorption, moisturizing, conditioning, antibacterial and other functions; suitable for moisturizer, shower gear, facial cleanser, mousse, high-grade cream, lotion, colloidal cosmetics, etc .; effective to make up for general shells Defects of glycan.
2, Flocculant special chitosan
Both chitosan and its derivatives have good flocculation and clarification. As the clarified agent of the beverage, the suspension can be quickly flocculated, naturally precipitated, and the yield of the stock solution can be improved; in the traditional Chinese medicine extract, the protein, tannic acid and pectin of the macromolecule can be conveniently removed by the chitosan solution. The effective ingredients with high purity Chinese medicine; use chitosan to have a good effect in water quality purification.
3, Agriculture, feed, bait special chitosan
Chitosan is a natural plant nutrition contributing agent-foliar fertilizer raw material, which is blended with chitosan, which can give plants insecticides, resistance, and fertilizers. Decompose the soil in the soil in the plant residue and the micro-metal element, which is used to convert the nutrients of plants, enhance plant immunity, promote plant health; shrimp shells, crab shells contain rich protein, trace elements, animal meals, have Good nutritional value.
4, UTA (adsorbent) special chitosan
UTA special chitosan is a chitosan series product processed by special processes; it can effectively adsorb the protein, 40% higher than the adsorption of general chitosan.
5, Tobacco (cigarette) special chitosan
This product can be mixed with the sole, and can adhere to the surface of the tobacco fiber, which can enhance the tensile strength, water resistance, breaking resistance, and is not easy to break when processing, suitable for modern high-speed cigarettes; the tobacco additive can make the smoking The performance is significantly enhanced, which has the effect of reducing the content of tobacco tar and nicotine, alleviating the tobacco gas, the harmful substance is reduced in the flue gas, the smell is improved, the aroma is revealed; can effectively suppress the saving of tobacco time.