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What is polyvinyl alcohol used for?

What is polyvinyl alcohol used for?

Synthetic polymers (such as PVA), natural polymers (such as alginate, starch, chitosan) or any materials with these components have a prominent position as important and biodegradable materials with biocompatibility. These materials were developed in the 1980s and are very attractive due to their recyclability and the natural continuity of their physical and chemical properties.


(1) What is polyvinyl alcohol?

Poly (vinyl alcohol) (PVOH, PVA, or PVAL) is a water-soluble synthetic polymer. It has the ideal formula [CH 2 CH(OH)] n. It is used for papermaking and textile warp sizing, as a thickener and emulsion stabilizer in PVAc binder formulations and various coatings. It is colorless (white) and tasteless. . It is usually in the form of beads or an aqueous solution.

 

(2) Application areas of Polyvinyl alcohol

Polyvinyl alcohol (PVA) is mainly made of polyvinyl acetate through hydrolysis, which is easily biodegradable and it is a soluble crystal structure polymer in water. PVA is a man-made polymer that has been used worldwide in the first half of the 20th century. It has been used in industrial, commercial, medical and food fields, and has been used to produce many final products.

Finished products include, for example, lacquer, resin, surgical thread, and food packaging materials that are often in contact with food. PVA is a biodegradable natural polymer that can be used for papermaking coatings and textile sizing. The polymer is widely used by blending with other polymer compounds (such as biopolymers and other hydrophilic polymers); due to its compatible structure and hydrophilicity, it is used in various industrial applications. Enhance the mechanical properties of the film. Some man-made polymers are made from non-renewable and non-biodegradable raw materials, such as PVA. Polymers are biodegradable, petroleum-based synthetic materials, under aerobic (composting) or anaerobic (landfilling) conditions. PVA is a widely used thermoplastic polymer, which is harmless, harmless and non-toxic to living tissues.

PVA is a biodegradable polymer. Due to the presence of hydroxyl groups on carbon atoms, it can be hydrolyzed to improve its degradability. In addition, it is water-soluble and hydrophilic. In the paper industry, several synthetic copolymers and conventional polymers are usually used, such as polyurethane (PU), polystyrene and maleic anhydride SBR, SMA, polyacrylamide PAM and PVA, to strengthen paper by coating paper Features and characteristics.

 

(3) The use of Polyvinyl alcohol in various countries and fields

PVA has biocompatibility, low protein adhesion tendency and low toxicity, so it can be used in various medical applications. Specific uses include cartilage substitutes, contact lenses and eye drops. Polyvinyl alcohol is used as an auxiliary for suspension polymerization. Its main application in China is used as a protective colloid for the preparation of polyvinyl acetate dispersions. In Japan, its main purpose is to produce vinylon fiber. Due to self-sufficiency reasons, this fiber is also produced in North Korea because it can be produced without oil. Another application is photographic film.

Today, PVA-based polymers have been widely used in additive manufacturing. For example, 3D printed oral dosage forms show great potential in the pharmaceutical industry. In the case where PVA is used as a binder, a medicated tablet with improved drug release characteristics can be made. In medicine, it can also be used as an embolic agent in uterine fibroids embolectomy (UFE).

 

PVA is a man-made polymer that has been used in medical and other fields for many years. Based on clinical and non-clinical studies, extensive research has been conducted on this polymer. PVA-HNT nanocomposites can be used in general clinical operations, such as cartilage replacement or cartilage transplantation, because they have the advantage of being easy to obtain compared to cartilage transplantation. It is a very excellent raw material. If you have any needs, you can contact us.


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