Graphene oxide nanocomposite membrane having improved gas barrier characteristics and method for manufacturing the same

Abstract

The present invention relates to a technique of manufacturing a graphene oxide nanocomposite membrane in which 3 μm to 5 μm-sized graphene oxide is coated with a thickness of 10 nm or more on various supports, or a graphene oxide nanocomposite membrane having a structure in which graphene oxide is inserted into a polymer. The graphene oxide nanocomposite membrane manufactured according to the present invention has excellent barrier characteristics against various gases even when graphene oxide, of which the size is controlled to 3 μm to 5 μm, is coated as a nanometer-thick thin film on various supports or the graphene oxide nanocomposite membrane has a simple structure in which graphene oxide is inserted into a polymer, and thus the graphene oxide nanocomposite membrane can be applied to the packaging of display devices, food, and medical products.

Description

TECHNICAL FIELD[0001]The present invention relates to a graphene oxide nanocomposite membrane with improved gas barrier characteristics and a method for manufacturing the same. More specifically, the present invention relates to a method of manufacturing a nanocomposite membrane including 3 μm to 50 μm-sized graphene oxide coated to a thickness of 10 nm or more on various supports, or a graphene oxide nanocomposite membrane having a structure in which graphene oxide is inserted into a polymer, wherein the nanocomposite membranes exhibit excellent barrier characteristics against various gases and thus can be applied to packaging of display devices, food and medical products.BACKGROUND ART[0002]Graphene is a substance composed of a single carbon atom layer in the form of a hexagonal honeycomb, which has most been in the highlight in industry and academia since it was first discovered in 2004, because it is quite interesting and exhibits excellent physical and chemical properties owing...

AI Technical Summary

Benefits of technology

[0041]The graphene oxide nanocomposite membrane manufactured according to the present invention has excellent barrier characteristics against various gases even when graphene oxide, the size of which is controlled to 3 μm to 50 μm, is coated as a nanometer-thick thin film on various supports or the graphene oxide nanocomposite membrane has a simple structure in which graphene oxide is inserted into a polymer, and thus the graphene oxide nanocomposite membranes can be applied to the packaging of display devices, food and medical products.

Problems solved by technology

When defects are generated in graphene, gas and ion molecules are easily permeated into defective graphene parts and inherent barrier characteristics thereof are thus lost.

For this reason, when graphene is formed as a thin film, disadvantageously, it cannot maintain barrier characteristics against gas and ion molecules.

However, the structure of the graphene laminate film is slightly complicated and only data showing oxygen and water vapor permeability is shown and barrier characteristics thereof against various gases are not known to date (Patent Document 1).

In addition, graphene / polymer composite protective membranes including a plurality of graphene layers and a plurality of polymer layers between the respective graphene layers are known, but it is only disclosed that the graphene composite membranes have complex structures and are applicable as gas and water barriers, and detailed results associated with gas barrier characteristics of the graphene composite membranes are not disclosed and practical application of the graphene composite membranes to the industry is limited (Patent Document 2).

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