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Thin film with good antibacterial property and degradability and preparation method thereof

A degradable film, antibacterial technology, applied in the direction of sustainable manufacturing/processing, flexible coverings, climate sustainability, etc., can solve the problems of earth's white pollution, lack of antibacterial and biodegradable, etc., to achieve antibacterial Excellent performance, price and performance advantages, uniform dispersion effect

Active Publication Date: 2015-04-29
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these three types of plastic wrap have a certain fresh-keeping function, they are not antibacterial and biodegradable, which is one of the reasons for the white pollution of the earth.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1: Film with excellent antibacterial properties and biodegradability

[0050] 1. Dissolve 5g of sodium alginate in 250ml of acetic acid solution with a concentration of 0.5%, dissolve in a water bath at 50°C, stir continuously during the dissolution process, dissolve into a solution after 1 hour, and obtain a sodium alginate solution with a concentration of 2%;

[0051] 2. Add 10ml of 0.001mol / L lysozyme solution dropwise to 30ml of sodium alginate solution, react at room temperature for 1 hour, and degas to obtain No. 1 liquid.

[0052] 3. Weigh 0.2g of soluble starch into a small beaker, add 0.5 times the volume of starch weight glycerin to moisten, add polylactic acid (PLA, the mass ratio of PLA to starch is 5:1), and then heat and dissolve on a hot stage at 50°C , stir evenly, and scrape the film on the glass slide with a glass rod to obtain the No. 2 film;

[0053] 4. Add 10ml of No. 1 solution to 0.01ml of formaldehyde solution (the concentration of forma...

Embodiment 2

[0055] Example 2: Film with excellent antibacterial properties and biodegradability

[0056] 1. Dissolve 5g of gelatin in 250ml of glacial acetic acid solution with a concentration of 0.1%, dissolve in a water bath at 50°C, stir continuously during the dissolution process, dissolve into a solution after 1h, and obtain gelatin with a mass (g / ml) fraction of 2% solution;

[0057] 2. Add 10ml of 0.001mol / L lysozyme solution dropwise to 30ml of gelatin solution, react at room temperature for 1 hour, and degas to obtain No. 1 liquid.

[0058] 3. Weigh 0.2 g of soluble starch in a small beaker, add glycerin twice the weight of the starch to moisten it, add polyethylene succinic acid-adipate-butylene glycol ester (PBSA, the mass ratio of PLA to starch is 5:1) and then heated and dissolved on a hot stage at 60°C, stirred evenly, and scraped the film on the glass slide with a glass rod to obtain the No. 2 film.

[0059] 4. Add 0.1ml of glyoxal aqueous solution to 10ml of No. 1 solution...

Embodiment 3

[0061] Example 3: Film with excellent antibacterial properties and biodegradability

[0062] 1. Dissolve 5g of chitosan in 50ml of glacial acetic acid solution with a concentration of 5%, dissolve in a water bath at 90°C, stir continuously during the dissolution process, and completely dissolve into a chitosan solution with a mass fraction of 10% after 5 hours .

[0063] 2. Add 10ml of 10mol / L AgNO dropwise to 30ml chitosan solution 3 solution, reacted at room temperature for 10 h, and degassed to obtain No. 1 liquid.

[0064] 3. Weigh 0.2g of soluble starch into a small beaker, add glycerin with a volume 5 times the weight of the starch to moisten, add polybutylene succinate (PBS, the mass ratio of PBS to starch is 5:1) and heat Heat at 200°C to dissolve, stir evenly, and scrape the film on the glass slide with a glass rod to obtain No. 2 film.

[0065] 4. Add 10ml of No. 1 solution to 150ml of glutaraldehyde aqueous solution (concentration: 25%) as a cross-linking agent, ...

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PUM

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Abstract

The invention relates to a thin film with good antibacterial property and degradability and a preparation method thereof. The thin film is manufactured by the following components: a biodegradable thin film, an antibacterial coating, a cross-linking agent and a treating fluid which is ammonia water, a urea solution or a hydrazine hydrate solution. As for raw materials, degradable natural polymer materials and synthetic degradable materials are adopted as the raw materials in the method. Compared with the conventional products, the thin film has the characteristic of degradability, and is an environment-friendly material.

Description

technical field [0001] The invention relates to an antibacterial film, in particular to a film with excellent antibacterial and degradable properties and a preparation method thereof. Background technique [0002] The antibacterial material "Zeomic" developed by Japan is an odorless white fine-grained inorganic powder developed by ion technology. The alkalinity reaches pH13, and the amount added to the resin is about 1-3%. However, this kind of zeolite is expensive and cannot be degraded, which limits the promotion of its application range. The antibacterial component in Zeomic is silver ions, which are stably fixed inside the skeletal structure of zeolite, and dissolve under the action of water, solvents, etc., so that the antibacterial effect remains effective for a long time, and the heat resistance is as high as 800°C. [0003] Li Yong et al. used artificial zeolite (Na 2 al 2 o 3 · XSiO 2 ·YH 2 O, a kind of aluminosilicate) as carrier, Ag, Zn 2 It is adsorbed on ...

Claims

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Application Information

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IPC IPC(8): C08J7/12C08J7/04C08J5/18C08L3/02C08L67/04C08L67/02C08K5/053B65D65/38
CPCY02W90/10
Inventor 段久芳
Owner BEIJING FORESTRY UNIVERSITY
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