Graphene protective film serving as a gas and moisture barrier, method for forming same, and use thereof
AssigneeGraphene Square, Inc.
InventorsJonghyun Ahn, Byung Hee Hong, Youngbin Lee, Hyeong Keun Kim, Su Kang Bae
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Abstract
The present invention relates to a method for forming a graphene protective film having gas and moisture barrier properties, to a graphene protective film formed by the method, and to the use thereof. A single-layer or multilayer graphene protective film can be used as a material for a barrier coating or bags, and improves the gas and moisture barrier properties of a variety of devices in a wide array of industrial fields to thereby maintain the electrical characteristics of devices over a long period of time.
Claims12
A flexible barrier sheet having a length and width and comprising:
- a graphene protective film comprising at least two graphene layers, each of the at least two graphene layers being a monolayer of covalently bonded carbon atoms having a uniform thickness across the length and the width of the flexible barrier sheet;
- a flexible substrate on a first side of the graphene protective film;
- an insulating polymer layer on a second and opposite side of the graphene protective film;
- a first adhesion layer between the graphene protective film and the flexible substrate;
- and,
- a second adhesion layer between the graphene protective film and the insulating polymer layer,
- wherein the graphene protective film blocks the penetration of gas and moisture through the graphene protective film, and a moisture transmittance of the graphene protective film ranges from 10−4 g/m2/day to 10−1 g/m2/day, and
- wherein the insulating polymer layer blocks the conductivity of graphene protective film.
A flexible barrier sheet having a length and a width and comprising:
- a flexible substrate;
- a metal layer formed on the flexible substrate;
- a plurality of graphene layers formed on the metal layer, each of the graphene layers being a monolayer of covalently bonded carbon atoms having a uniform thickness across the length and the width of the flexible barrier sheet;
- an insulating polymer layer formed on a side of the plurality of graphene layers opposite the metal layer;
- an adhesion layer between the plurality of graphene layers and the insulating polymer layer;
- an adhesion layer between each successive layer of the graphene protective film;
- and,
- an adhesion layer between the plurality of graphene layers and the flexible substrate;
- wherein the barrier sheet blocks the penetration of gas and moisture through the barrier sheet, and a moisture transmittance of the flexible barrier sheet ranges from 10−4 g/m2/day to 10−1 g/m2/day, and
- wherein the insulating polymer layer blocks the conductivity of plurality of graphene layers.
Dependencies are inferred from the claim text.