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In-situ preparation method of antibacterial cellulose film, antibacterial cellulose film prepared with method and application of antibacterial cellulose film

An in-situ preparation and cellulose technology, applied to flexible coverings, packaging, wrapping paper, etc., can solve the problems of long manufacturing time and poor antibacterial performance, and achieve manufacturing process and time saving, mild conditions and high strength Effect

Pending Publication Date: 2019-07-23
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The main purpose of the present invention is to provide an in-situ preparation method of cellulose antibacterial film, the cellulose antibacterial film prepared by the method and its application, the technical problem to be solved is to overcome the zinc oxide modified cellulose The film has the defects of long manufacturing time and poor antibacterial performance of the film, so it is more practical

Method used

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  • In-situ preparation method of antibacterial cellulose film, antibacterial cellulose film prepared with method and application of antibacterial cellulose film

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preparation example Construction

[0041] The present invention proposes a kind of in-situ preparation method of cellulose antibacterial film, it comprises the following steps:

[0042] (1) pulverizing the cellulose pulp board to obtain cellulose powder;

[0043] (2) dissolving the cellulose powder in a composite solvent composed of an ionic liquid and zinc chloride to obtain a cellulose solution;

[0044] (3) The cellulose solution is allowed to stand for defoaming, and it is coated on the base material to form a cellulose solution layer and make it level;

[0045](4) putting the base material coated with the cellulose solution layer described in step (3) into a sodium hydroxide solution to carry out a coagulation bath, so that the cellulose is coagulated and regenerated;

[0046] (5) Ultrasonic treatment of the coagulation bath of step (4) to obtain a cellulose wet film modified by nano-zinc oxide, cleaning;

[0047] (6) keeping the cleaned wet film at room temperature for 24h to 48h, and drying to obtain a...

Embodiment 1

[0090] Weigh 20g of ionic liquid AmimCl and 0.2g of zinc chloride into a beaker, heat at 80°C for 2h until the solution is clear and transparent. Then add 0.8 g of cotton linters under magnetic stirring at 300 rpm, heat for 3 hours to completely dissolve the cellulose, and let it stand for 1 hour to completely defoam. Then scrape the film on a smooth glass plate with a thickness of 0.56mm, and place the glass plate in an oven at 90°C for 10 seconds to make the surface of the film smooth. Next, put the coated glass plate into 1000 mL of sodium hydroxide solution with a concentration of 0.0882 g / L, solidify and regenerate at room temperature for 10 min, and ultrasonically treat it for 2 h. , placed at room temperature to dry, and the dried film was placed in an oven at 60°C for 12 hours to obtain a regenerated cellulose film. As detected by XPS, there were ZnO-OH linkages on the surface of the membrane, indicating that ZnO was successfully loaded. The ZnO nanoparticles were sp...

Embodiment 2

[0093] Weigh 20g of ionic liquid EmimAc and 0.4g of zinc chloride into a beaker, heat at 80°C for 2h until the solution is clear and transparent. Then add 0.8 g of cotton linters under magnetic stirring at 300 rpm, heat for 3 hours to completely dissolve the cellulose, and let it stand for 1 hour to completely defoam. Then scrape the film on a smooth glass plate with a thickness of 0.56mm, and place the glass plate in an oven at 90°C for 10 seconds to make the surface of the film smooth. Next, put the coated glass plate into 1000 mL of sodium hydroxide solution with a concentration of 0.1764 g / L, solidify and regenerate at room temperature for 10 min, and ultrasonically treat it for 2 h. , placed at room temperature to dry, and the dried film was placed in an oven at 60°C for 12 hours to obtain a regenerated cellulose film. As detected by XPS, there were ZnO-OH linkages on the surface of the membrane, indicating that ZnO was successfully loaded. The ZnO nanoparticles were sp...

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Abstract

The invention relates to an in-situ preparation method of an antibacterial cellulose film, the antibacterial cellulose film prepared with the method and an application of the antibacterial cellulose film. The method comprises steps as follows: cellulose pulp boards are crushed, and cellulose powder is obtained; the cellulose powder is dissolved in a compound solvent formed by an ionic liquid and zinc chloride, and a cellulose solution is obtained; the cellulose solution is left to stand for defoaming and applied to a substrate material to form a cellulose solution layer, and the cellulose solution layer is levelled; the substrate material coated with the cellulose solution layer is put in a sodium hydroxide solution, so that cellulose is solidified and regenerated; a coagulating bath is subjected to ultrasonic treatment, and nano zinc oxide modified wet cellulose film is obtained and cleaned; the cleaned wet film is aired at the room temperature, and nano zinc oxide modified dry cellulose film is obtained; the dry cellulose film is put in an oven to be heated, and the antibacterial cellulose film is obtained. The antibacterial cellulose film overcomes the defects of long manufacturing time and poor antibacterial performance of zinc oxide modified dry cellulose films in the prior art and is more practical.

Description

technical field [0001] The invention relates to a preparation method of a cellulose film, in particular to an in-situ preparation method of a cellulose antibacterial film, a cellulose antibacterial film prepared by the method and an application thereof. Background technique [0002] With the development of science and technology and the improvement of people's living standards, the market demand for plastic packaging products is growing rapidly. At present, plastic packaging film materials have been widely used in food, medicine, chemical industry and other fields. Among them, the safety of food packaging is closely related to human physical and mental health, and has attracted widespread attention. Ordinary food packaging film is mainly processed from petrochemical raw materials such as polyethylene or polyvinylidene chloride. Its industrial production technology is mature, but the toxic gas generated during the preparation process will migrate into the food and endanger hu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/02C08K3/22C08J5/18C08B16/00B65D65/46
CPCC08J5/18C08B16/00B65D65/466C08J2301/02C08K2201/011C08K2003/2296Y02P20/54
Inventor 许凤李鑫张逊游婷婷吴玉英
Owner BEIJING FORESTRY UNIVERSITY
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