ASYMMETRY COMPOSITE MATERIAL

Abstract

The present application relates to an asymmetry composite material and a method for preparing the same, which provides a composite material comprising a metal porous body (metal foam or the like) and a polymer component, and provides a method for preparing a composite material, wherein the polymer component is formed in an asymmetrical structure on both sides of the metal porous body (metal foam or the like), and a composite material prepared in such a manner.

Claims

1. A method for preparing an asymmetry composite material, the method comprising: providing a metal porous body that comprises a first surface and a second surface opposite to the first surface, wherein a resin layer is present on the first surface; and applying a first polymer layer to the second surface of the metal porous body.

2. The method for preparing the asymmetry composite material according to claim 1, wherein the resin layer is a pressure-sensitive adhesive layer.

3. The method for preparing the asymmetry composite material according to claim 1, wherein applying the first polymer layer comprises applying a first polymer layer solution.

4. The method for preparing the asymmetry composite material according to claim 1, further comprising curing or crosslinking the first polymer layer after applying the first polymer layer.

5. The method for preparing the asymmetry composite material according to claim 4, further comprising removing the resin layer after the curing or crosslinking the first polymer layer.

6. The method for preparing the asymmetry composite material according to claim 5, further comprising washing resin layer residues after removing the resin layer.

7. The method for preparing the asymmetry composite material according to claim 5, further comprising, after removing the resin layer, applying a second polymer layer to the first surface of the metal porous body.

8. The method for preparing the asymmetry composite material according to claim 7, further comprising curing or crosslinking the second polymer layer after applying the first polymer layer.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0064] FIG. 1 is a cross-sectional diagram of an asymmetry composite material of the present application.

[0065] FIG. 2 is an exemplary diagram for explaining a method of manufacturing an asymmetry composite material of the present application.

EXPLANATION OF REFERENCE NUMERALS

[0066] 1: first polymer layer

[0067] 2: second polymer layer

[0068] 3: metal porous body

[0069] 11: pressure-sensitive adhesive layer

[0070] 12: base material or release film

BEST MODE

[0071] Hereinafter, the present application will be described in detail by way of examples and comparative examples, but the scope of the present application is not limited to the following examples.

Example 1

[0072] A metal porous body was a copper metal foam, where the copper metal foam being in the form of a film having a thickness of 100 μm and having porosity of approximately 75% or so was used. While using a pressure-sensitive adhesive sheet (base material PET) having an acrylic pressure-sensitive adhesive layer with a thickness of 10 μm, the metal foam was placed on the pressure-sensitive adhesive layer and then pressurized with a load of about 3 Kg. Thereafter, polydimethylsiloxane (PDMS, Sylgard 184) was coated on the opposite surface of one surface in contact with the pressure-sensitive adhesive layer of the pressurized copper foam to a thickness of 20 μm, using a film applicator and thermal curing heated in an oven at 120° C. for 20 minutes to form a first polymer layer. After curing, the pressure-sensitive adhesive sheet (PET-pressure-sensitive adhesive layer) was removed to prepare a composite material. Then, on the surface from which the pressure-sensitive adhesive sheet of the composite material was removed, an epoxy resin (Kukdo Chemical, Resin YD-128+curing agent G640) was coated with a film applicator to a thickness of 20 μm for forming a second polymer layer and heated in an oven at 80° C. for 60 minutes to prepare an asymmetry composite material.

Example 2

[0073] An asymmetry composite material was prepared in the same method as in Example 1, except that as the second polymer layer, a thermosetting acrylic resin (LG Chem) was coated with a film applicator to a thickness of 20 μm and heated in an oven at 80° C. for 60 minutes.

Example 3

[0074] An asymmetry composite material was prepared in the same method as in Example 1, except that as the second polymer layer, a coating liquid, in which polydimethylsiloxane (PDMS, Sylgard 184) and copper powder (particle diameter: 10 μm, dendrite type) were mixed at a weight ratio of 90:10, was coated to a thickness of 20 μm with a film applicator and heated in an oven at 120° C. for 20 minutes.

Example 4

[0075] An asymmetry composite material was prepared in the same method as in Example 1, except that as the second polymer layer, a coating liquid, in which polydimethylsiloxane (PDMS, Sylgard 184) and graphite powder (particle diameter 5 μm, flake type) were mixed at a weight ratio of 90:10, was coated to a thickness of 20 μm with a film applicator and heated in an oven at 120° C. for 20 minutes.

Example 5

[0076] An asymmetry composite material was prepared in the same method as in Example 1, except that as the first polymer layer, a coating liquid, in which polydimethylsiloxane (PDMS, Sylgard 184) and copper powder (particle diameter: 10 μm, dendrite type) were mixed at a weight ratio of 90:10, was coated to a thickness of 20 μm with a film applicator and heated in an oven at 120° C. for 20 minutes to form the first polymer layer, and

[0077] As the second polymer layer, a coating liquid, in which polydimethylsiloxane (PDMS, Sylgard 184) and copper powder (particle diameter: 10 μm, dendrite type) were mixed at a weight ratio of 70:30, was coated to a thickness of 20 μm with a film applicator and heated in an oven at 120° C. for 20 minutes to form the second polymer layer.

Comparative Example 1

[0078] An asymmetry composite material was prepared in the same method as in Example 1, except that the pressure-sensitive adhesive sheet having an acrylic pressure-sensitive adhesive layer was not applied to the metal foam. Specifically, on the copper metal foam of Example 1, polydimethylsiloxane (PDMS, Sylgard 184) was coated on one side of the copper foam with a film applicator to a thickness of 20 μm and heated in an oven at 120° C. for 20 minutes to form the first polymer layer. After curing, an epoxy resin (Kukdo Chemical, Resin YD-128 +curing agent G640) was coated with a film applicator to a thickness of 20 μm for forming the second polymer layer and heated in an oven at 80° C. for 60 minutes to prepare an asymmetry composite material.

Experimental Example 1

Surface Resistance Measurement

[0079] For the polymer layers of the composite materials prepared in Examples 3 to 5, the surface resistance was measured according to the standard test method with MITSUBISHI CHEMICAL CORPORATION, MCP-HT450 surface resistance meter. The measurement of the surface resistance was performed by measuring the surface resistance value under the environment of 23° C. and 50% relative humidity.

Experimental Example 2

Peel Force Measurement

[0080] After storing the first polymer layers or the second polymer layers of the composite materials prepared in Examples 1 and 2 for 3 days under 25° C. and 50% relative humidity, the peel force of the first or second polymer layers to a copper plate (peel rate: 5 mm/sec, peel angle: 180 degrees) was measured.

[0081] The measurement was measured under constant temperature and humidity conditions and the peel force was measured based on ASTM3330 using a texture analyzer.

TABLE-US-00001 TABLE 1 First polymer layer Second polymer layer Peel force (g/mm) Peel force (g/mm) Example 1 0.5 Not measurable Example 2 0.5 50

[0082] The second polymer layer of Example 1 is not re-peelable and cured to have no pressure-sensitive adhesive property.

TABLE-US-00002 TABLE 2 First polymer layer Second polymer layer Surface resistance (Ω/□) Surface resistance (Ω/□) Example 3 4.0 × 10.sup.13 3.2 × 10.sup.−1 Example 4 4.0 × 10.sup.13 5.1 × 10.sup.−1 Example 5 3.2 × 10.sup.−1 2.3 × 10.sup.−2

[0083] In Comparative Example 1, upon coating polydimethylsiloxane (PDMS, Sylgard 184) as the first polymer layer, the liquid polydimethylsiloxane was applied to the first surface of the copper foam (the surface of the copper foam to which the first polymer layer was applied), and then penetrated into the pores and simultaneously penetrated to the second surface (the opposite surface of the first surface), whereby the first polymer layer was consequently formed on both sides of the metal copper foam. Thereafter, even if the second polymer layer is applied, the second polymer layer is formed on the first polymer layer already formed on the second surface.