Long-acting antibacterial mildewproof polyvinyl alcohol and preparation method and application thereof

Abstract

Provided is long-acting antibacterial mildewproof polyvinyl alcohol. The long-acting antibacterial mildewproof polyvinyl alcohol has the characteristic of being mainly prepared from polyvinyl alcohol,liquid bromine, an organic antibacterial agent and sodium alkoxide, wherein the organic antibacterial agent is one or a combination of more of 5-chloro-2-methyl-4-isothiazoline-3-one, 4,5-dichloro-2-n-octyl-4-isothiazoline-3-one, 2-octyl-4-isothiazoline-3-one, probenazole, 2-methyl-4-isothiazoline-3-one, 2-n-octyl-4-isothiazoline-3-one and isothiazol-3-one. The invention also provides a preparation method of the long-acting antibacterial mildewproof polyvinyl alcohol. The long-acting antibacterial mildewproof polyvinyl alcohol can be added as an antibacterial additive to a base material polyvinyl alcohol so as to prepare a polyvinyl alcohol product with antibacterial and mildewproof properties, and can also be used as a component of adhesives; and the long-acting antibacterial mildewproofpolyvinyl alcohol has excellent mildewproof and antibacterial properties and excellent antibacterial long-acting properties, and has low preparation cost and a simple process.

Description

technical field [0001] The invention relates to the technical field of antibacterial materials, in particular to a long-acting antibacterial and antifungal polyvinyl alcohol and its preparation method and application. Background technique [0002] Polyvinyl alcohol (PVA) is a widely used soluble resin with many excellent properties, such as water solubility, film forming, adhesiveness, thermal stability, etc. It is widely used in construction glue, textile size, adhesive Mixture, fiber, paper and biodegradable biofilm and other fields. However, because polyvinyl alcohol is a polymer material that can be used by bacteria as a carbon source and its own good water solubility, not only makes polyvinyl alcohol products easy to breed and spread bacteria, but also easy to mold and rot. The lack of antibacterial performance limits the further popularization and application of polyvinyl alcohol, so the development of antibacterial polyvinyl alcohol has great practical significance. ...

AI Technical Summary

Problems solved by technology

Inorganic antibacterial agents have the advantages of safety, heat resistance, persistence, and broad-spectrum antibacterial properties. They are the most suitable antibacterial agents for daily products such as fibers, plastics, and building materials. The disadvantages are high prices and delayed antibacterial effects. Not suitable for preparing transparent products

The advantages of organic low-molecular antibacterial agents are wide sources, mature technology, strong bactericidal power, fast sterilization rate, wide antibacterial range, and low price. Most antibacterial agents can be well dispersed in the matrix, but their shortcomings are also significant. Mainly due to high toxicity, poor safety, poor heat resistance, poor chemical stability, more importantly, it is easy to make microorganisms resistant to drugs, and the service life is short

The advantages of organic polymer antibacterial agents are many types, strong bactericidal power, stable performance, non-volatile, non-toxic, good antibacterial effect, long-lasting antibacterial performance, and high efficiency. The disadvantage is that they are used in large amounts and are incompatible with polymer materials.

The advantages of natural antibacterial agents are broad-spectrum antibacterial, natural and environmentally friendly, non-toxic and harmless, good biocompatibility, and a wide range of sources. The disadvantages are that they are not heat-resistant, and their efficacy is generally short

[0004] Adding antibacterial agents to polymer materials by blending is the simplest, most convenient and economical method to improve the performance of antibacterial materials, but because there is no chemical bond with the matrix polymer material, or it is incompatible with the matrix polymer material , It is easy to cause problems such as the easy precipitation and loss of antibacterial agents in the matrix material, resulting in poor long-term antibacterial properties of antibacterial materials

In the prior art, antibacterial agents are basically directly added to polyvinyl alcohol to make polyvinyl alcohol have antibacterial properties, but there are still problems such as easy precipitation of antibacterial agents, uneven distribution, and poor long-term effect.

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