Antibacterial biological film material and preparation method thereof

Abstract

The invention provides an antibacterial biological film material and a preparation method thereof. The antibacterial biological film material is prepared from the following components: polylactic acid, ethyl orthosilicate, silver citrate, titanium dioxide, chitosan solution, polyisopropyl acrylamide colloid, acetone, N,N-dimethylformamide, didecyl dimethyl ammonium chloride, sodium dodecyl sulfate, an antioxidant, an antibacterial agent and water. The biological film material prepared with the method provided by the invention has the functions of killing bacteria and preventing mildew, has long-lasting antibacterial property, can be used for various purposes in the antibacterial field, such as food packaging, fresh-keeping bags, and drug packaging, and is low in preparation cost, simple inmethod, non-toxic and harmless.

Description

technical field [0001] The invention belongs to the technical field of biomaterials, and in particular relates to an antibacterial biofilm material and a preparation method thereof. Background technique [0002] With the improvement of people's living standards, the use of film materials is becoming more and more extensive. At present, the most used film materials in society are made of polyethylene, polypropylene, polyvinyl chloride, polyester and other materials. The above materials are only Some simple materials, with the progress of society, the film of the above materials can only meet certain needs, but cannot meet some special requirements, such as food packaging, vegetable preservation, to meet the requirements of seasonal storage of fruits and vegetables, long-distance transportation, export, etc. At the same time, there are more and more film materials with certain functions. For example, special film materials with antibacterial, anti-mildew and anti-biological pr...

AI Technical Summary

Problems solved by technology

[0002] With the improvement of people's living standards, the use of film materials is becoming more and more extensive. At present, the most used film materials in society are made of polyethylene, polypropylene, polyvinyl chloride, polyester and other materials. The above materials are only Some simple materials, with the progress of society, the film of the above materials can only meet certain needs, but cannot meet some special requirements, such as food packaging, vegetable preservation, to meet the requirements of seasonal storage of fruits and vegetables, long-distance transportation, export, etc. At the same time, there are more and more film materials with certain functions. For example, special film materials with antibacterial, anti-mildew and anti-biological properties are becoming more and more popular.

[0003] There are traditional antibacterial films on the market, such as antibacterial films that directly coat the antibacterial ingredients on the surface of the film. This kind of antibacterial film is coated with an antibacterial agent solution on the surface of the substrate film and bonded with the material in the middle layer. Although the process is simple, but There are also many problems, such as ultra-fine antibacterial agent powder, and the use of organic solvents to dissolve, which will cause harm to the human body and the environment, and after the antibacterial agent is dried, the surface composition will be uneven, which limits the antibacterial effect. Large, fast volatilization, difficult to sterilize for a long time, thus affecting the long-lasting antibacterial effect