Gel film with curdlan quaternary ammonium salt and polyvinyl alcohol and antibacterial application of gel film

A technology of polyvinyl alcohol gel and polyvinyl alcohol, which is applied in the direction of fungicides, chemicals for biological control, biocides, etc., can solve the problems of decreased elongation and solubility, and achieves pollution-free, stable Good performance and good mechanical properties

Active Publication Date: 2016-06-08
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, as the degree of polymerization increases, the viscosity of the aqueous solution of the same concentration increases, and the strength and solvent resistance after film formation increase, but the solubility in water decreases, and the elongation after film formation decreases.

Method used

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  • Gel film with curdlan quaternary ammonium salt and polyvinyl alcohol and antibacterial application of gel film
  • Gel film with curdlan quaternary ammonium salt and polyvinyl alcohol and antibacterial application of gel film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: (1) Take 4g of polyvinyl alcohol and soak it in 100mL of deionized water at room temperature for 30min, stir and dissolve for 2h to obtain a polyvinyl alcohol solution; (2) Take 0.12g of sucrose ester S-1570 and add it to (1), Stir and dissolve at 30°C for 1h; (3) Add 0.12g Span-80 to 0.6g liquid paraffin and stir at 30°C for 0.5h; (4) Drop the paraffin mixture prepared in (3) into (2) The prepared solution was stirred and emulsified at 30°C for 8h; (5) 1g of epoxy soybean oil was added to the emulsion prepared in (4), and stirred at 60°C for 0.5h; (6) 1g of epoxidized soybean oil Add ammonium salt to the emulsion prepared in (5), stir and dissolve for 2h; (7) Pour the mixed solution prepared in (6) into the container, flatten and degas, and place the container at -10℃ to freeze 4 Then, take out the container and thaw at room temperature for 3 hours. After repeating the above freezing and thawing process 3 times, it is placed in air drying at 30° C. to obtain ...

Embodiment 2

[0031] Example 2: (1) Take 2.5 g of polyvinyl alcohol and soak in 100 mL of deionized water at room temperature for 40 minutes, stir and dissolve for 2 hours to obtain a polyvinyl alcohol solution; (2) Take 0.16 g of sucrose ester S-1570 and add it to (1) , Stir and dissolve at 60℃ for 1h; (3) Add 0.16g Span-80 to 0.8g liquid paraffin and stir for 0.5h at 60℃; (4) Drop the paraffin mixture prepared in (3) into (2) The prepared solution was stirred and emulsified at 60°C for 5h; (5) 0.5g of glycerin was added to the emulsion prepared in (4), and stirred at 60°C for 0.5h; (6) 2.5g of Koderan gum quaternary ammonium salt Add the emulsion prepared in (5), stir to dissolve for 2h; (7) Pour the mixed solution prepared in (6) into a container, spread it out and degas, put the container at -20℃ and freeze for 4 hours, Then, the container was taken out and thawed at room temperature for 3 hours, and after the above freezing and thawing process was repeated 5 times, it was placed in air ...

Embodiment 3

[0032] Example 3: (1) Take 3.5 g of polyvinyl alcohol and soak it in 100 mL of deionized water at room temperature for 40 minutes, stir and dissolve for 2 hours to obtain a polyvinyl alcohol solution; (2) Take 0.20 g of sucrose ester S-1570 and add it to (1) , Stir and dissolve at 80℃ for 1h; (3) Add 0.20g Span-80 to 1.0g liquid paraffin and stir at 80℃ for 0.5h; (4) Drop the paraffin mixture prepared in (3) into (2) The prepared solution was stirred and emulsified at 80°C for 2h; (5) 1.5g of glycerin was added to the emulsion prepared in (4), and stirred at 80°C for 0.5h; (6) 1.5g of quaternary ammonium salt Add the emulsion prepared in (5), stir to dissolve for 2h; (7) Pour the mixed solution prepared in (6) into the container, spread it out and degas, put the container at -10°C and freeze for 4 hours, Then, the container was taken out and thawed at room temperature for 3 hours, and after the above freezing and thawing process was repeated 3 times, it was placed in air drying...

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PUM

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Abstract

The invention relates to a gel film with curdlan quaternary ammonium salt and polyvinyl alcohol and application of the gel film in the antibacterial aspect. The curdlan quaternary ammonium salt and the polyvinyl alcohol are used as film-forming materials for the gel film. The polyvinyl alcohol is emulsified and hydrophobically modified by the aid of grease substances, and packaging materials comprise components including the 0.02-0.10g / mL H2O polyvinyl alcohol, 0.002-0.020 g / mL H2O total surfactants, the 0.005-0.02 g / mL H2O grease substances and 0.005-0.02 g / mL H2O plasticizers, the components are subjected to reaction, composite emulsification, freezing, thawing and cross-linking in aqueous solution to obtain the packaging materials, and a weight ratio of the curdlan quaternary ammonium salt to the polyvinyl alcohol is 4:1-1:4. Mixed emulsion is subjected to repeated freezing, thawing and cross-linking at the temperatures of -10--40 DEG C after being poured into a container, standing still and being de-foamed, and then is dried at the temperatures of 30-40 DEG C by means of air blowing so as to obtain the gel film. The gel film with the curdlan quaternary ammonium salt and the polyvinyl alcohol and the application have the advantages that the gel film has uniform microstructures and broad-spectrum antibacterial and sterilization performance and is excellent in mechanical property, and antibacterial effects can be realized by the gel film for Escherichia coli, staphylococcus, staphylococcus aureus and mildew; the gel film can be degraded, and the antibacterial effects can be realized by the gel film.

Description

Technical field [0001] The present invention relates to a preparation method of Kodran gum quaternary ammonium salt / polyvinyl alcohol gel film. A method of repeated freezing and thawing is used to prepare a Kodran gum quaternary ammonium salt / polyvinyl alcohol gel film with antibacterial activity. Gel film, this gel film has uniform microstructure, good thermal and mechanical properties, and broad-spectrum antibacterial properties. The invention belongs to the field of composite materials, and is mainly used for packaging materials such as cling film, food packaging bags, medicine packaging and the like. Background technique [0002] With the improvement of people's living standards, the enhancement of environmental protection awareness and the decline of oil and coal reserves, the concepts of health and green are increasingly accepted by the public. With the continuous improvement of people’s demand for food quality, safety and hygiene and the advocacy of the concept of green p...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L29/04C08L5/02C08L91/00C08K5/053A01P1/00A01P3/00
CPCC08J5/18C08J2305/02C08J2329/04C08L5/02C08L29/04C08L2203/16C08L2205/03C08L91/00C08K5/053
Inventor 陈美玲梁萍萍
Owner JIANGNAN UNIV
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