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High-oxygen-resistance polymer nano-composite film and preparation method thereof

A nano-composite, hydrophilic polymer technology, applied in the field of nano-composite materials, can solve the problems of the limitation of comprehensive performance improvement of composite membranes, the inability to meet the needs of engineering, and the mechanical properties of agglomerated composite membranes, so as to achieve easy industrial implementation and increase toughness , excellent mechanical properties

Inactive Publication Date: 2019-06-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method effectively improves the oxygen barrier properties of the composite membrane, but consumes too much filler, which is easy to cause waste of filler; and a large amount of filler is easy to agglomerate in the substrate, resulting in a decrease in the mechanical properties of the composite membrane.
The dispersion and distribution of the fillers in the polymer substrate of the high oxygen barrier nanocomposite film and the interaction force between the filler and the substrate need to be improved; with the increase of the filler content, the improvement of the barrier properties of the composite film is often accompanied by the mechanical properties As a result, the overall performance of the composite membrane is limited, which cannot meet the needs of actual engineering.

Method used

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  • High-oxygen-resistance polymer nano-composite film and preparation method thereof
  • High-oxygen-resistance polymer nano-composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Add 0.09g of graphene oxide to 30mL of deionized water, stir at 200rpm for 60min, disperse with ultrasound (frequency 25kHZ, power 150W) for 150min, and stir for 2min at intervals of 30min during this period to obtain uniform graphite oxide with a concentration of 3mg / mL olefin dispersion.

[0040] (2) Add 6g of polyvinyl alcohol (PVA) into 80mL of deionized water, stir at 700rpm and 95°C for 2.5h to dissolve it completely, and obtain a solution of polyvinyl alcohol with a concentration of 7.5%, which is the first solution; Dissolve 0.5550g of calcium chloride in 10mL of deionized water to prepare a calcium ion solution with a concentration of 20mg / mL, which is the second solution.

[0041] (3) Slowly add the graphene oxide dispersion into the first solution, stir at 600 rpm for 30 min, then slowly add 2.7 mL of the second solution dropwise to the above mixed solution, and continue stirring for 2 h. The obtained mixture was degassed by ultrasonic (frequency 25kHZ, ...

Embodiment 2

[0047] (1) Add 0.048g of graphene oxide to 30mL of deionized water, stir at 200rpm for 40min, disperse with ultrasound (frequency 25kHZ, power 150W) for 120min, and stir for 2min at intervals of 30min during this period, to obtain a uniform oxide concentration of 1.6mg / mL. Graphene dispersion.

[0048] (2) Add 6g polyvinyl alcohol (PVA) to 80mL deionized water, stir at 700rpm at 95°C for 2.5h to dissolve completely, add 2.4mL of 25% glutaraldehyde aqueous solution after cooling, stir (500rpm, 40°C ) for 60 min, to obtain a cross-linked polyvinyl alcohol solution with a concentration of 7.5%, which is the first solution; dissolving 0.2097g zinc chloride in 10mL deionized water, and configuring it into a zinc ion solution with a concentration of 10mg / mL, which is the second solution solution.

[0049] (3) Slowly add the graphene oxide dispersion into the first solution, stir at 600 rpm for 30 min, then slowly add 2.88 mL of the second solution dropwise to the above mixed soluti...

Embodiment 3

[0052] (1) Add 0.16g of graphite oxide flakes to 30mL of deionized water, stir at 300rpm for 60min, disperse with ultrasound (frequency 25kHZ, power 300W) for 180min, and stir for 2min at intervals of 30min during this period, to obtain a uniform oxide with a concentration of 5.3mg / mL Graphite flake dispersion.

[0053] (2) Add 8g of polyethylene oxide (PEO) into 100mL of deionized water, stir at room temperature for 2 hours at 500rpm to dissolve it completely, and obtain a polyethylene oxide solution with a concentration of 8%, which is the first solution; Dissolve 0.6075g of nickel chloride hexahydrate in 10mL of deionized water to form a nickel ion solution with a concentration of 15mg / mL, which is the second solution.

[0054] (3) Slowly add the graphite oxide flake dispersion into the first solution, stir at 700 rpm for 30 min, then slowly add 5.3 mL of the second solution dropwise into the above mixed solution, and continue stirring for 4 h. The obtained mixture was deg...

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Abstract

The invention discloses a high-oxygen-resistance nano-composite membrane and a preparation method thereof. The preparation method comprises the following steps: adding a filler dispersion liquid intoa first solution, conducting uniform stirring, dropwise adding a second solution, conducting uniform mixing under stirring, carrying out ultrasonic degassing treatment and standing, conducting tape-casting on the mixed liquid to enable the mixed liquid to enter a mold, and conducting drying and curing to obtain the high-oxygen-resistance nano-composite film. The lamellar nano-filler is controlledto account for 0.2-2 wt% of the total mass of the raw materials. The first solution is obtained by adding a hydrophilic polymer into deionized water and conducting heating and stirring to completely dissolve the hydrophilic polymer; the second solution is obtained by dissolving a metal chloride in deionized water to prepare a metal ion solution; and the uniform filler dispersion liquid is obtainedby adding a lamellar nano-filler into deionized water and conducting uniform stirring and mixing and ultrasonic treatment. The high-oxygen-resistance nano-composite membrane has the advantages of being excellent in oxygen barrier property, small in filler consumption, simple and convenient to operate, easy to process, biodegradable and excellent in comprehensive mechanical property.

Description

technical field [0001] The invention relates to an oxygen-barrier packaging film, in particular to a high-oxygen-barrier nanocomposite film and a preparation method thereof, belonging to the technical field of nanocomposite materials. Background technique [0002] Gas barrier polymers are widely used in the fields of food, medicine, cosmetic packaging, agricultural coating, and electronic packaging due to their light weight, low cost, and easy processing and molding. As the environmental problems caused by traditional plastic packaging become increasingly prominent, degradable packaging materials have become a new trend in the development of the packaging industry. Polyvinyl alcohol, chitosan, polyethylene oxide, cellulose derivatives and other polymers have good degradability, film-forming properties and biocompatibility, and are widely used in food, pharmaceutical packaging, agricultural coating, electronic packaging, etc. Fields show good application prospects. However,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08K3/04C08K3/16C08K7/00C08L71/02C08L1/28C08L5/08C08K9/04C08K3/38C08K3/30C08J5/18
Inventor 裴丽霞周碧茹张立志
Owner SOUTH CHINA UNIV OF TECH
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