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Preparation method for graphene oxide with high barrier property and polymer nanocomposite film

A high-barrier, nano-composite technology, used in flexible coverings, transportation and packaging, packaging, etc., can solve problems such as poor gas barrier properties, and achieve improved barrier properties, high safety, and good environmental protection effects.

Inactive Publication Date: 2011-07-06
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a preparation method of high-barrier graphene oxide and polymer nanocomposite films, which solves the problem of poor gas barrier properties of polymer films in the prior art

Method used

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  • Preparation method for graphene oxide with high barrier property and polymer nanocomposite film
  • Preparation method for graphene oxide with high barrier property and polymer nanocomposite film
  • Preparation method for graphene oxide with high barrier property and polymer nanocomposite film

Examples

Experimental program
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Effect test

Embodiment 1

[0021] First add 4g of expandable graphite to 100ml of 98% concentrated H 2 SO 4 Stir in the mixture to obtain the mixture A; then add 28g KMnO to the mixture A while stirring 4 , after adding, stir at 38°C for 1 hour to obtain a homogeneous mixture B; then add 400ml of deionized water and 6ml of 30% H 2 o 2 , stir evenly to obtain mixture C; filter mixture C to obtain 40ml of paste, first wash with 40ml of 3.5% HCl solution, and then repeatedly wash with deionized water until the pH of the paste is 7, then use It was dispersed in 6000ml of deionized water by ultrasonic wave, and finally the dispersion was dehydrated at 60°C to obtain 6g of graphene oxide.

[0022] Add 0.2g of graphene oxide into 200ml of water, and stir at 45°C for 1h while ultrasonically treating (power 400W) to obtain a colloidal suspension of graphene oxide; then add 19.8g of polyvinyl alcohol to the graphene oxide colloidal suspension, Under the condition of 20 ℃, ultrasonic treatment (power 400W) was...

Embodiment 2

[0026] First add 4.35g of expandable graphite to 100ml of 98% concentrated H 2 SO 4 Stir in the mixture to obtain the mixture A; then add 26.1g KMnO to the mixture A while stirring 4 , after adding, stir at 40°C for 1 hour to obtain a homogeneous mixture B; then add 360ml of deionized water and 11ml of 30% H 2 o 2 , stirred evenly to obtain mixture C; mixture C was filtered to obtain 43.5ml of paste, which was first washed with 87ml of 3.5% HCl solution, then repeatedly washed with deionized water until the pH of the paste was 7, and then It was dispersed in 6400ml of deionized water by ultrasonic waves, and finally the dispersion was dehydrated at 60°C to obtain 6.525g of graphene oxide.

[0027] Add 0.02g of graphene oxide into 20ml of dimethylformamide, and stir for 1h while ultrasonically treating (400W power) at 30°C to obtain a colloidal suspension of graphene oxide; then add 19.98 g polystyrene, under the condition of 100°C, ultrasonic treatment (400W power) while s...

Embodiment 3

[0030] First add 4g of expandable graphite to 100ml of 98% concentrated H 2 SO 4 Stir in the mixture to obtain the mixture A; then add 28g KMnO to the mixture A while stirring 4 , after adding, stir at 40°C for 1 hour to obtain a homogeneous mixture B; then add 783ml of deionized water and 8ml of 30% H 2 o 2 , stir evenly to obtain mixture C; filter mixture C to obtain 40ml of paste, first wash with 40ml of 3.5% HCl solution, and then repeatedly wash with deionized water until the pH of the paste is 7, then use It was dispersed in 6000ml of deionized water by ultrasonic wave, and finally the dispersion was dehydrated at 60°C to obtain 6g of graphene oxide.

[0031] Add 0.1g of graphene oxide into 100ml of tetrahydrofuran, and stir at 20°C for 1h while ultrasonically treating (power 400W) to obtain a colloidal suspension of graphene oxide; then add 19.9g of polyformaldehyde to the colloidal suspension of graphene oxide methyl methacrylate, and stirred at 120°C for 3 hours w...

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Abstract

The invention provides a preparation method for graphene oxide with high barrier property and a polymer nanocomposite film. The preparation method comprises the following steps: graphene oxide is added in solvent for stirring to obtain a colloidal suspension of graphene oxide during the ultrasonic processing at the temperature of 20 to 45 DEG C; a polymer is added in the colloidal suspension of graphene oxide for stirring during the ultrasonic processing at the temperature of 20 to 120 DEG C, until the polymer is completely dissolved to obtain a solution of graphene oxide / polymer; and after air bubbles in the solution of graphene oxide / polymer are removed, the graphene oxide / polymer nanocomposite film is obtained by a casting method or blow molding method. The carbon dioxide transmission coefficient of the prepared nanocomposite film containing graphene oxide is reduced by more than 150 times, and the prepared nanocomposite film containing graphene oxide can be used for packaging food and drugs with higher requirements of barrier property.

Description

technical field [0001] The invention belongs to the technical field of composite film preparation technology, and in particular relates to a preparation method of a high-barrier graphene oxide and polymer nanocomposite film. Background technique [0002] With its excellent comprehensive properties, plastic products have been more and more widely used in food and pharmaceutical packaging as a substitute for glass and ceramics. However, the barrier performance of general-purpose plastic packaging materials is still difficult to meet the actual use requirements, and the deterioration or degradation of food and medicine caused by poor packaging reaches 30-40%. Therefore, improving the barrier properties of packaging materials has always been a hot spot and focus of research in the packaging industry at home and abroad. In the current polymer barrier technology, nano-sheet fillers are used to fill polymer systems, using the good interface between polymers and fillers and the "mu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L25/06C08L33/12C08L77/00C08L79/08C08L33/26C08L23/06C08L23/12C08K9/02C08K3/04C08J5/18B29C49/00B65D65/02
Inventor 任鹏刚靳彦岭陈涛李忠明
Owner XIAN UNIV OF TECH
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