Application of chitosan and derivatives
Chitosan and its derivatives have many excellent properties due to their renewability, biocompatibility and various active groups in the structure. They have been widely used in cosmetics, food, medicine, agriculture, environmental protection, etc. In the industry.
1. The use of chitosan and its derivatives in environmental protection can form a stable integrase through the amino and hydroxyl groups in the molecule and various metal ions and can help the particles to coagulate. Therefore, it is widely used as wastewater treatment in chemical industry, light industrial textiles, etc. Adsorbents and flocculants. As an adsorbent and flocculant, chitosan can effectively capture heavy metal ions and organic matter in solution, and can inhibit bacterial growth and clear sewage, especially for mercury, chromium, copper, lead, cobalt,
2, the use of foods Chitosan is widely used in food, here only mention its application in the supplement of trace elements. The body needs to absorb trace elements. At the appropriate pH, the amino and hydroxyl groups contained in the chitosan molecule can effectively sequester certain metal ions. By adding these chelates to foods, it is possible to make trace element supplements. In addition, the addition of chitosan to foods can combine some trace elements in the stomach environment to prevent the loss of these trace elements.
3, the use of chitosan and its derivatives in daily cosmetics has strong adhesion, and has excellent properties such as film formation, heat preservation, dustproof, antistatic, etc., so it can be used to prepare hair fixatives and hair protectants. , softener, etc., not only can make the hair fluffy, easy to comb, maintain the color of the hair, but also promote hair growth, widely used in the preparation of shampoo, emollient, solid hair mousse and shampoo, etc. For traditional ingredient products.
4. Application in medicine In the pharmaceutical industry, the surgical suture made of chitosan has good mechanical strength, can be stored for a long time, can be disinfected by conventional methods, can be absorbed by the body tissue degradation, and does not need to be removed after wound healing. Surgical line. Artificial skin made of chitosan has soft and comfortable characteristics. Covering the burned surface can relieve pain, accelerate wound healing and promote skin regeneration [3]. In addition, chitosan can also be used for the preparation of microcapsules and sustained release of vaccines, as a carrier for anti-inflammatory eye ointments, and for the manufacture of contact lenses and the like.
5. Application in textiles Chitosan acetic acid solution is used as a curing agent for direct dyes and thinning dyes, which not only improves the light and abrasion resistance of fabrics and fabrics, but also makes the fabrics have a smooth and stiff appearance.
6. Application in papermaking Chitosan and its derivatives can effectively improve the dry and wet strength of paper and improve surface printing. It is widely used in printing production to meet the requirements of high-speed printing and high-viscosity inks.
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