Sodium hyaluronate powder is a recognized natural moisturizing factor with "a thousand-fold water-locking ability." At the same time, it is a polysaccharide compound in the human body, which has compatibility and safety that many other polymer compounds do not have. It has the physical properties of high viscoelasticity and has been widely used in ergonomic tissue engineering. It is also thermally unstable, and its viscosity and molecular weight are easily affected by changes in pH conditions, so it must be stored for a long time under low temperatures (e.g., <8°C) and neutral conditions.
In the early days, the connective tissues of vertebrates such as bovine pig eye vitreous, cockscomb, and human umbilical cord were used as raw materials, and the crude hyaluronic acid was extracted by water extraction and ethanol precipitation and purified by DEAE-cellulose to obtain high-purity hyaluronic acid. Powder. It is now mainly produced by biological fermentation. Especially have the following functions:
1. Moisturizing effect
Its most important role in cosmetics, compared with other moisturizing agents, the relative humidity of the surrounding environment has less influence on its moisturizing ability;
2. Nutritional effect
It is an inherent biological substance of the skin and the exogenous which is a supplement to the endogenous skin. The smaller ones can penetrate the epidermis layer of the skin to promote the supply of skin nutrients and the excretion of wastes, thereby preventing skin aging and playing a role in beauty and beauty;
3. Skin damage repair and prevention
By promoting the proliferation and differentiation of epidermal cells and scavenging oxygen free radicals, it can promote the regeneration of the injured part of the skin, and it also has a specific preventive effect when used in advance;
4. Lubricity and film-forming
It is a high molecular polymer with strong lubricity and film-forming properties. Skincare products containing it has an evident lubricating feel when applied and feel good. After being applied to the skin, it can form a thin film on the skin's surface, which makes the skin feel smooth and moist, and protects the skin. And the hair care products containing it can form a film on the surface of the hair, which can moisturize, lubricate, protect the hair, eliminate static electricity, etc., making the hair easy to comb, elegant, and natural;
5. thickening
It has a very high viscosity in an aqueous solution, and it's 1% aqueous solution is gel-like, and it can thicken and stabilize when added to cosmetics.
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