KR101901484B1 - Graphene polymer composite film for shielding electromagnetic wave, and method of fabricating the same - Google Patents

Graphene polymer composite film for shielding electromagnetic wave, and method of fabricating the same Download PDF

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Publication number
KR101901484B1
KR101901484B1 KR1020150093304A KR20150093304A KR101901484B1 KR 101901484 B1 KR101901484 B1 KR 101901484B1 KR 1020150093304 A KR1020150093304 A KR 1020150093304A KR 20150093304 A KR20150093304 A KR 20150093304A KR 101901484 B1 KR101901484 B1 KR 101901484B1
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South Korea
Prior art keywords
graphene
graphene oxide
electromagnetic wave
shielding film
wave shielding
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KR1020150093304A
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Korean (ko)
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KR20170003808A (en
Inventor
한태희
박헌
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한양대학교 산학협력단
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/005—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile
    • B32B9/007—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile comprising carbon, e.g. graphite, composite carbon
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • H05K9/0088—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a plurality of shielding layers; combining different shielding material structure

Abstract

A method for producing a graphene polymer composite electromagnetic wave shielding film is provided. The method for producing the graphene polymer composite electromagnetic wave shielding film comprises the steps of preparing a graphene oxide and a polymer, mixing the graphene oxide and the polymer in a solvent which simultaneously dissolves the graphene oxide and the polymer, Wherein the graphene oxide is reduced and burnt by heat treatment of the source solution to generate graphene and a reaction gas and the graphene is dispersed in the porous polymer matrix produced by foaming with the reaction gas, Shielding film having a thickness of 100 mu m.

Description

TECHNICAL FIELD The present invention relates to a graphene polymer composite electromagnetic wave shielding film and a manufacturing method thereof,

TECHNICAL FIELD [0001] The present invention relates to an electromagnetic wave shielding film and a method of manufacturing the same, and more particularly, to a graphene polymer composite electromagnetic wave shielding film and a manufacturing method thereof.

2. Description of the Related Art Recently, various digital electronic devices such as PCs, portable terminals, portable media players and the like have been widely used. Accordingly, there is a problem that an electromagnetic wave generated in an electronic device affects another electronic device through a space, or affects another electronic device through a wire or a PCB to cause a malfunction.

Such electromagnetic disturbances are manifested in various ways ranging from malfunctions of computers to accidental incidents of factories, and furthermore, research results that have a negative impact on the human body have been announced, thus raising concerns and concern about health. In addition, electromagnetic wave shielding technology for various electronic appliances is emerging as a core technology field of the electronic industry, while being disturbed in strengthening regulations and preparing countermeasures against electromagnetic wave disturbance mainly in developed countries.

Accordingly, various techniques for shielding electromagnetic waves have been developed. For example, Korean Patent Registration No. 10-0995563 (Application No. 10-2010-0041847, filed by Inox Co., Ltd.) is used for an electric wave shielding electric wire which can be applied to a flexible printed circuit board and which has an adhesive force, heat resistance, electric conductivity, A conductive adhesive film is disclosed.

Korean Patent Registration Bulletin 10-0995563

SUMMARY OF THE INVENTION The present invention provides a high-reliability graphene polymer composite electromagnetic wave shielding film and a manufacturing method thereof.

It is another object of the present invention to provide a graphene polymer composite electromagnetic wave shielding film with improved electromagnetic shielding ratio and a method of manufacturing the same.

Another technical problem to be solved by the present invention is to provide a graphene polymer composite electromagnetic wave shielding film having a simplified manufacturing process and a manufacturing method thereof.

It is another object of the present invention to provide a graphene polymer composite electromagnetic wave shielding film with reduced manufacturing cost and a method of manufacturing the same.

It is another object of the present invention to provide a graphene polymer composite electromagnetic wave shielding film which is lightweight and miniaturized and excellent in portability and a method of manufacturing the same.

The technical problem to be solved by the present invention is not limited to the above.

In order to solve the above-described technical problems, the present invention provides a method for producing a graphene polymer composite electromagnetic wave shielding film.

According to one embodiment, the method for producing the graphene polymer composite electromagnetic wave shielding film comprises the steps of preparing a graphene oxide and a polymer, mixing the graphene oxide and the polymer in a solvent which simultaneously dissolves the graphene oxide and the polymer, And a step of preparing a porous polymer matrix prepared by heat-treating the source solution to generate graphene and a reaction gas by reducing and burning the graphene oxide, And a step of preparing an electromagnetic wave shielding film in which the graphene is dispersed.

According to one embodiment, depending on the degree of dispersion of the graphene oxide in the source solution, the degree of dispersion of the graphene in the porous polymer matrix may be controlled.

According to one embodiment, the lower the degree of dispersion of the graphene oxide in the source solution, the greater the degree of dispersion of the graphene in the porous polymer matrix.

According to one embodiment, the source solution may further include at least one of a metal, a metal oxide, a polymer, and a carbonaceous material.

According to one embodiment, the graphene oxide in the source solution may be less than 30 wt%.

According to one embodiment, as the content of the graphene oxide in the source solution is increased, the strength of the electromagnetic wave shielding film can be reduced.

According to one embodiment, as the content of the graphene oxide in the source solution is reduced, the surface resistance of the electromagnetic wave shielding film can be increased.

According to one embodiment, the reaction gas may include carbon dioxide, or carbon monoxide.

In order to solve the above technical problems, the present invention provides a graphene polymer composite electromagnetic wave shielding film.

According to one embodiment, the graphene polymer composite electromagnetic wave shielding film may include a porous polymer matrix formed by a foaming process, and graphene dispersed in the porous polymer matrix.

According to one embodiment, the graphene is produced from graphene oxide, and the graphene oxide may serve as a blowing agent in the foaming process.

According to an embodiment of the present invention, an electromagnetic wave shielding film in which graphene is dispersed in a porous polymer matrix can be produced by dissolving graphene oxide and a polymer to prepare a source solution and heat-treating the source solution. Thus, a graphene polymer composite electromagnetic wave shielding film with a simplified manufacturing process and reduced manufacturing cost, light weight and miniaturization, and high reliability can be provided, and a manufacturing method thereof.

1 is a flow chart for explaining a method of manufacturing a graphene polymer composite electromagnetic wave shielding film according to an embodiment of the present invention.
2 is a SEM photograph of a graphene polymer composite electromagnetic wave shielding film according to an embodiment of the present invention.
FIG. 3 is a graph showing the measurement results of the electromagnetic shielding ratio of the graphene poly-composite electromagnetic wave shielding film according to the embodiment of the present invention.
4 is a photograph of a graphene polymer composite electromagnetic wave shielding film prepared by varying the content of graphene oxide according to an embodiment of the present invention.
5 is a SEM photograph of a graphene polymer composite electromagnetic wave shielding film prepared by varying the content of graphene oxide according to an embodiment of the present invention.
6 is a graph showing a surface resistance measurement of a graphene polymer composite electromagnetic wave shielding film prepared by varying the content of graphene oxide according to an embodiment of the present invention.
FIG. 7 is a SEM photograph of a graphene polymer composite electromagnetic wave shielding film prepared by different kinds of solvents according to an embodiment of the present invention.
8 is a view illustrating an example of an application of the graphene polymer composite electromagnetic wave shielding film according to an embodiment of the present invention.
9 is a view showing another application example of a graphene polymer composite electromagnetic wave shielding film according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the technical spirit of the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that the disclosure can be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

Also, in this specification, 'and / or' are used in the sense of including at least one of the components listed before and after. In the specification, the singular expressions include plural expressions unless the context clearly indicates otherwise. It is also to be understood that the terms such as " comprises "or" having "are intended to specify the presence of stated features, integers, Should not be understood to exclude the presence or addition of one or more other elements, elements, or combinations thereof. Also, in this specification, the term "connection " is used to include both indirectly connecting and directly connecting a plurality of components.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a flow chart for explaining a method of manufacturing a graphene polymer composite electromagnetic wave shielding film according to an embodiment of the present invention.

Referring to FIG. 1, a graphene oxide and a polymer are prepared (S110). According to one embodiment, the polymer may be PDMS (Polydimethylsiloxane). Alternatively, the polymer may include PE (polyethylene), PMMA (poly (methyl methacrylate)), PS (polystyrene), PET (polyethylene terephthalate) According to one embodiment, the polymer may have tack properties.

A source solution may be prepared by mixing the graphene oxide and the polymer in a solvent that simultaneously dissolves the graphene oxide and the polymer (S120). As the content of the graphene oxide relative to the polymer is increased, the mechanical properties of the electromagnetic wave shielding film produced using the source solution may be deteriorated. For example, when the ratio of the graphene oxide in the source solution is 30 wt% or more, the mechanical properties of the electromagnetic wave shielding film produced using the source solution may be significantly deteriorated.

Also, as the content of the graphene oxide is decreased with respect to the polymer, the surface resistance of the electromagnetic wave shielding film manufactured using the source solution can be increased. For example, when the ratio of the graphene oxide in the source solution is 5 wt% or less, the electric conductivity of the electromagnetic wave shielding film produced using the source solution can be remarkably reduced. Accordingly, according to an embodiment of the present invention, the ratio of the graphene oxide in the source solution may be more than 5 wt% to less than 30 wt%.

As described above, the solvent may be a substance having a high solubility with respect to the graphene oxide and the polymer. For example, the solvent may be selected from the group consisting of perfluorotributylamine, perfluorodecalin, pentane, diisopropylamine, hexanes, n-heptane, triethylamine, ether, cyclohexane, trichlorethylene, dimethoxyethane, xylenes, toluene, ethyl acetate, benzene, chloroform, N-methylpyrrolidone, tert-butyl alcohol, acetonitrile, 1-propanol, phenol, dimethylformamide, nitromethane, ethyl alcohol, dimethyl sulfoxide, propylene carbonate, methanol, ethylene glycol, or glycerol Or the like.

In addition to the graphene oxide and the polymer, at least one of a metal, a metal oxide, a polymer, and a carbonaceous material may be further added to the solvent. For example, the metal may be at least one of copper (Cu), iron (Fe), nickel (Ni), aluminum (Al), tin (Sn), zinc (Zn), silver (Ag) And the metal oxide may be one selected from the group consisting of zinc oxide (ZnO), tin oxide (SnO 2 ), iron oxide (Fe 2 O 3 ), zirconium oxide (ZrO 2 ), or titanium oxide (TiO 2 ) And the polymer may include at least one of polypyrrole, polythiophene, and polyaniline, and the carbonaceous material may include at least one of carbon black, Carbon fiber, carbon nanotube (CNT), or the like.

The source solution may be heat-treated to produce an electromagnetic wave shielding film in which graphene is dispersed in the porous polymer matrix (S130). For example, the source solution may be heat treated at 80 to 400 < 0 > C.

The source solution may be heat treated such that the graphene oxide is reduced and burned. Accordingly, the graphene and the reaction gas can be generated. The reaction gas may be carbon dioxide (CO 2 ) or carbon monoxide (CO). Wherein the polymer in the source solution is foamed by the reaction gas generated by the combustion of the graphene oxide to produce the porous polymer matrix and the graphene oxide is reduced, Can be dispersed within the matrix. In other words, as described above, when the porous polymer matrix is formed by a foaming process, the graphene oxide may act as a blowing agent.

According to one embodiment, depending on the degree of dispersion of the graphene oxide in the source solution, the degree of dispersion of the graphene in the porous polymer matrix may be controlled. In particular, the lower the degree of dispersion of the graphene oxide in the source solution, the greater the degree of spraying of the graphene in the porous polymer matrix. In other words, when the graphene oxide is dispersed in the source solution with a relatively high dispersion, the graphene oxide may not be burnt and the dispersion degree of the graphene in the porous polymer matrix may be lowered. On the other hand, if the graphene oxide is dispersed in the source solution with a relatively low dispersion, the graphene oxide may be reduced and burned at the same time, so that the graphene may be dispersed relatively evenly in the porous polymer matrix.

According to one embodiment, a plurality of the graphens dispersed in the porous polymer matrix may be connected to one another to form a conductive path in the porous polymer matrix.

According to one embodiment, the source solution may be heat treated after being injected into a mold. Accordingly, the electromagnetic wave shielding film may have various shapes corresponding to the mold.

Also, as noted above, when the polymer has tack properties, the porous polymer matrix may also have tack properties. In this case, the electromagnetic wave shielding film in which graphene is dispersed in the porous polymer matrix may be used as a patch type attached to the outer surface of the electronic device.

According to an embodiment of the present invention, the source solution is prepared by dissolving the graphene oxide and the polymer, and the source solution is heat-treated to produce the electromagnetic wave shielding film in which the graphene is dispersed in the porous polymer matrix . Thus, a graphene polymer composite electromagnetic wave shielding film with a simplified manufacturing process and reduced manufacturing cost, light weight and miniaturization, and high reliability can be provided, and a manufacturing method thereof.

Further, as described above, according to this embodiment of the present invention, the graphene oxide and the polymer are dissolved in the solvent, the pore size in the porous polymer matrix becomes small, and the number of pores can be increased. Further, as described above, the graphene can be evenly dispersed in the porous polymer matrix by the explosive combustion of the graphene oxide. Accordingly, a graphene polymer composite electromagnetic wave shielding film improved in electromagnetic wave shielding ratio with multi reflection loss of an incident electromagnetic wave and a method of manufacturing the same can be provided.

Hereinafter, the evaluation results of the characteristics of the graphene polymer composite electromagnetic wave shielding film according to the embodiment of the present invention described above will be described.

2 is a SEM photograph of a graphene polymer composite electromagnetic wave shielding film according to an embodiment of the present invention.

Referring to FIG. 2, PDMS was prepared as a polymer and THF (tetrahydrofuran) was prepared as a solvent. PDMS and graphene oxide were dispersed in a solvent to prepare a source solution. The source solution was subjected to heat treatment to reduce the graphene oxide and to explode and burn to produce an electromagnetic wave shielding film in which graphene was dispersed in the PDMS matrix.

As can be seen in FIG. 2, it can be seen that the PDMS matrix has a plurality of pores and graphene is dispersed in the PDMS matrix. In other words, it can be seen that an electromagnetic wave shielding film in which graphene is dispersed in the porous polymer matrix can be easily produced by a method of heat-treating the source solution containing the polymer and the graphene oxide.

FIG. 3 is a graph showing a measurement result of the electromagnetic shielding ratio of a graphene polymer composite electromagnetic wave shielding film according to an embodiment of the present invention.

Referring to FIG. 3, a source solution is prepared by mixing PDMS, graphene oxide, and CNT in THF (tetrahydrofuran), and the source solution is heat-treated to form a 100 μm electromagnetic shielding film having graphene and CNT dispersed therein . The electromagnetic wave shielding ratio was measured for the prepared electromagnetic wave shielding film and a general PDMS film not containing graphene and CNT.

As can be seen from FIG. 3, although the general PDMS film has substantially no electromagnetic wave shielding effect, the electromagnetic wave shielding film in which graphene and CNT are dispersed in the PDMS matrix according to the embodiment of the present invention has a shielding effect of at least 10 dB As shown in FIG. In other words, according to the embodiment of the present invention, it is confirmed that when the graphene and CNT are dispersed in the polymer matrix, the electromagnetic shielding ratio is improved.

FIG. 4 is a photograph of a graphene polymer composite electromagnetic wave shielding film prepared by varying the content of graphene oxide according to an embodiment of the present invention. FIG. FIG. 6 is a SEM photograph of a graphene polymer composite electromagnetic wave shielding film prepared by varying the content of graphene oxide according to an embodiment of the present invention.

4 to 6, source solutions were prepared by dissolving PDMS in THF (tetrahydrofuran) while varying the content of graphene oxide. The source solutions having different contents of graphene oxide were subjected to heat treatment to reduce the graphene oxide and to explode and burn to produce electromagnetic wave shielding films having graphene dispersed in the PDMS matrix.

As can be seen from FIG. 4, as the content of graphene oxide is increased, the mechanical properties are lowered. Particularly, when the content of graphene oxide is 30 wt% or more, the mechanical properties are drastically lowered, . 6, as the content of graphene oxide is decreased, formation of a conductive network by graphene in the PDMS matrix is not easy and it is confirmed that the surface resistance of the electromagnetic wave shielding film is increased . In other words, it can be confirmed that the mechanical property and the conductivity of the electromagnetic wave shielding film can be controlled by controlling the content of the polymer in the source solution and the content of the graphene oxide.

FIG. 7 is a SEM photograph of a graphene polymer composite electromagnetic wave shielding film prepared by different kinds of solvents according to an embodiment of the present invention.

Referring to FIG. 7, a source solution according to an embodiment of the present invention was prepared by dissolving graphene oxide and PDMS in THF (tetrahydrofuran) which dissolves both graphene oxide and PDMS according to an embodiment of the present invention. The source solution was heat-treated to prepare an electromagnetic wave shielding film according to an embodiment of the present invention, and a SEM photograph was taken as shown in Fig. 7 (a).

Further, according to the first comparative example of the present invention, a source solution according to the first comparative example of the present invention was prepared by mixing graphene oxide and PDMS in a solvent which does not dissolve the graphene oxide and PDMS. The source solution was heat-treated to prepare an electromagnetic wave shielding film according to Comparative Example 1 of the present invention, and a SEM photograph was taken as shown in Fig. 7 (b).

Further, according to the second comparative example of the embodiment of the present invention, the source solution according to the second comparative example of the present invention was prepared by mixing graphene oxide and PDMS without using a solvent. The source solution was heat-treated to prepare an electromagnetic wave shielding film according to Comparative Example 2 of the present invention, and an SEM photograph was taken as shown in Fig. 7 (c).

As can be seen from Figs. 7 (a) to 7 (c), when the source solution according to the embodiment of the present invention in which graphene oxide and PDMS are dissolved in a solvent is used, a plurality of small pores are distributed in the PDMS matrix . On the other hand, as in the first and second comparative examples of the present invention, when a solvent which does not dissolve the graphene oxide and the PDMS is used or a solvent is not used, pores having a relatively large size are formed, Is relatively small. In other words, according to an embodiment of the present invention, it can be confirmed that preparing a source solution using a solvent that dissolves both the graphene oxide and the polymer is an efficient method of forming a polymer matrix having a plurality of small pores .

Hereinafter, an application example of the graphene polymer composite electromagnetic wave shielding film according to the embodiment of the present invention described above will be described. However, the following application examples are merely illustrative of an application example of the graphene polymer composite electromagnetic wave shielding film according to an embodiment of the present invention, and the scope and / or use of the present invention are not limited to those described below.

8 is a view illustrating an example of an application of the graphene polymer composite electromagnetic wave shielding film according to an embodiment of the present invention.

Referring to FIG. 8, a portable terminal is provided. The portable terminal may include an electromagnetic wave shielding film 100, a display panel 200, and a driving circuit unit 300. The electromagnetic wave shielding film 100 may be a graphene polymer composite electromagnetic wave shielding film manufactured by the method described with reference to FIG. The display panel 200 may include a gate line and a data line including a thin film transistor, and the driving circuit unit 300 may drive the display panel 200 or may include a communication module And the like.

The electromagnetic wave shielding film 100 is disposed between the display panel 200 and the driving circuit unit 300 to prevent electromagnetic waves emitted from the display panel 200 from being incident on the driving circuit unit 300, Or the electromagnetic wave emitted from the driving circuit unit 300 may be prevented from being incident on the display panel 200. Accordingly, the electromagnetic wave shielding film 100 prevents malfunctioning of the electromagnetic waves between the driving circuit unit 300 and the display panel 200, thereby providing a highly reliable portable terminal.

In addition to the structure shown in FIG. 8, the graphene polymer composite electromagnetic wave shielding film according to the embodiment of the present invention can be utilized in various parts of the portable terminal.

9 is a view showing another application example of a graphene polymer composite electromagnetic wave shielding film according to an embodiment of the present invention.

Referring to FIG. 9, the electromagnetic wave shielding film 120 according to the embodiment of the present invention can be manufactured using a polymer having adhesive properties. In this case, the electromagnetic wave shielding film 120 may have adhesive properties, and may be detachably attached to the outer surface of an electronic device such as a portable terminal, as shown in FIG.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. It will also be appreciated that many modifications and variations will be apparent to those skilled in the art without departing from the scope of the present invention.

100: electromagnetic wave shielding film
200: Display panel
300:

Claims (10)

Preparing a polymer comprising graphene oxide and at least one of PDMS, PE, PMMA, PS, or PET;
Mixing the graphene oxide and the polymer in a solvent that simultaneously dissolves the graphene oxide and the polymer to prepare a source solution; And
The source solution is heat-treated to reduce the graphene oxide to generate graphene and reaction gas. The electromagnetic wave shielding film in which the graphene is dispersed in the porous polymer matrix foamed by the reaction gas, Wherein the graphene is dispersed in the porous polymer matrix by explosive combustion of the graphene oxide. ≪ RTI ID = 0.0 > 8. < / RTI >
The method according to claim 1,
Wherein the dispersion degree of the graphene in the porous polymer matrix is controlled according to the degree of dispersion of the graphene oxide in the source solution.
3. The method of claim 2,
Wherein the lower the degree of dispersion of the graphene oxide in the source solution is, the greater the degree of dispersion of the graphene in the porous polymer matrix.
The method according to claim 1,
Wherein the source solution further comprises at least one of a metal, a metal oxide, a polymer, and a carbonaceous material.
The method according to claim 1,
Wherein the graphene oxide in the source solution is less than 30 wt%.
The method according to claim 1,
Wherein the intensity of the electromagnetic wave shielding film is decreased as the content of the graphene oxide in the source solution increases.
The method according to claim 1,
The polymer is water-insoluble,
The solvent may be selected from the group consisting of perfluorotributylamine, perfluorodecalin, pentane, diisopropylamine, hexanes, n-heptane, triethylamine, ether, cyclohexane, trichlorethylene, dimethoxyethane, xylenes, toluene, ethyl acetate, benzene, chloroform, 2-butanone, at least any one of chloride, acetone, dioxane, pyridine, N-methylpyrrolidone, tert-butyl alcohol, acetonitrile, 1-propanol, phenol, dimethylformamide, nitromethane, ethyl alcohol, dimethyl sulfoxide, propylene carbonate, methanol, ethylene glycol, Wherein the graphene polymer composite electromagnetic wave shielding film is formed on the surface of the substrate.
The method according to claim 1,
Wherein the reaction gas is carbon dioxide or carbon monoxide.
A porous polymer matrix formed by a foaming process; And
Graphene dispersed in the porous polymer matrix,
Wherein the porous polymer matrix comprises at least one of PDMS, PE, PMMA, PS, and PET.
10. The method of claim 9,
The graphene is produced from graphene oxide,
Wherein the graphene oxide acts as a blowing agent in the foaming process.
KR1020150093304A 2015-06-30 2015-06-30 Graphene polymer composite film for shielding electromagnetic wave, and method of fabricating the same KR101901484B1 (en)

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WO2020067837A1 (en) * 2018-09-28 2020-04-02 주식회사 엘지화학 Composite material
CN110787971B (en) * 2019-11-28 2022-06-14 江西邦力达科技股份有限公司 High-heat-conduction near-infrared electromagnetic shielding film
KR20240048279A (en) 2022-10-06 2024-04-15 한국전력공사 Composite material for shielding electromagnetic field in ultra low frequency and Method for manufacturing the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101066074B1 (en) 2010-05-10 2011-09-30 영남대학교 산학협력단 Broadband electromagnetic wave absorber and manufacturing method of the same
KR101579522B1 (en) 2014-07-25 2015-12-23 (주)창림이엔지 Resin composition having electro-magnetic wave absorption function with high thermal radiation, and molded article manufacture by using the same

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KR100995563B1 (en) 2010-05-04 2010-11-19 주식회사 이녹스 Electrical conductive adhesive film for emi shielding

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101066074B1 (en) 2010-05-10 2011-09-30 영남대학교 산학협력단 Broadband electromagnetic wave absorber and manufacturing method of the same
KR101579522B1 (en) 2014-07-25 2015-12-23 (주)창림이엔지 Resin composition having electro-magnetic wave absorption function with high thermal radiation, and molded article manufacture by using the same

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