WO2016175464A1 - Filtre de blindage contre les ondes électromagnétiques et procédé pour le produire - Google Patents

Filtre de blindage contre les ondes électromagnétiques et procédé pour le produire Download PDF

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Publication number
WO2016175464A1
WO2016175464A1 PCT/KR2016/003268 KR2016003268W WO2016175464A1 WO 2016175464 A1 WO2016175464 A1 WO 2016175464A1 KR 2016003268 W KR2016003268 W KR 2016003268W WO 2016175464 A1 WO2016175464 A1 WO 2016175464A1
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WO
WIPO (PCT)
Prior art keywords
shielding filter
polymer film
electromagnetic shielding
porous
sbs polymer
Prior art date
Application number
PCT/KR2016/003268
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English (en)
Korean (ko)
Inventor
유의상
김은주
이진아
임대영
Original Assignee
한국생산기술연구원
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Publication of WO2016175464A1 publication Critical patent/WO2016175464A1/fr

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    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • 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

Definitions

  • the present invention relates to an electromagnetic wave shielding filter and a method for manufacturing the same that can cover an excellent electromagnetic wave shielding capability and a wide range of wavelengths.
  • Electromagnetic waves mean electrical or magnetic wavelengths generated by electronic products or them, and the use of electronic, electrical and communication-related devices that generate electromagnetic waves is increasing rapidly according to the development of science and technology. At the same time, it provides humans with many harms.
  • the conventional electromagnetic shielding film, filter, etc. is a metal-based shielding, it was able to shield only the electromagnetic waves of a narrow frequency band, in order to shield the electromagnetic waves of a wide frequency, the thickness of the film or filter, etc. becomes thick, various shielding materials There was a problem that should be used.
  • the present invention has been made to solve the above problems, and an object thereof is to provide a method for manufacturing the same by an electromagnetic shielding filter and a simple method capable of shielding electromagnetic waves in a wide frequency region with a thin thickness.
  • Electromagnetic shielding filter of the present invention for achieving the above object is a porous polymer film; And metal nanoparticles deposited on the porous polymer film.
  • the metal nanoparticles may be at least one selected from silver, gold, copper, palladium or platinum.
  • the metal nanoparticles are spherical silver nanoparticles, the diameter may be 20 to 200nm.
  • the porous polymer film may be an SBS polymer.
  • the porous polymer film may be formed by a crystalline sugar mold.
  • the electromagnetic wave frequency covering region of the electromagnetic wave shielding filter of any one of claims 1 to 5 may be 200 MHz to 12 GHz.
  • the manufacturing method of the electromagnetic wave shielding filter includes preparing a porous SBS polymer film by a crystalline sugar mold and depositing metal nanoparticles on the prepared porous SBS polymer film.
  • the step of preparing the porous SBS polymer film may comprise the step of drying after molding the SBS polymer solution of 10 to 30% by weight in the crystalline sugar mold.
  • the depositing of the metal nanoparticles may include absorbing the metal nanoparticle precursor in the porous SBS polymer film by immersing the porous SBS polymer film in a metal nanoparticle precursor solution; And dropping a reducing solution on the porous SBS polymer film in which the metal nanoparticle precursor is absorbed to reduce the metal nano precursor to the metal nanoparticle.
  • the metal nanoparticle precursor solution may include at least one selected from AgNO 3, AgCl, HAuCl 4, CuCl 2, PtCl 2, and PtCl 4.
  • the metal nanoparticle precursor solution is a silver nanoparticle precursor solution, it may be 10 to 20% by weight of silver trifluoroacetate (Silver trifluoroacetate).
  • the reducing solution may be 40 to 60% by weight of hydrazine hydrate (Hydrazin hydrate).
  • the method may include washing the porous SBS polymer film in which the metal nanoparticles are deposited in distilled water.
  • the present invention which is derived to solve the problems of the prior art as described above, is an electromagnetic shielding filter capable of shielding electromagnetic waves in a wide frequency range with a high filter power.
  • the electromagnetic shielding filter can be manufactured by a simple manufacturing process, it is possible to improve the productivity.
  • FIG. 1 is a SEM photograph of a porous SBS polymer film according to an embodiment of the present invention.
  • FIG. 2 is a SEM photograph of silver nanoparticles as an embodiment of the present invention.
  • Figure 3 is a picture of one embodiment of the electromagnetic shielding filter of the present invention.
  • FIG. 4 is a graph showing data of shielding ability according to an electromagnetic wave frequency according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram showing a manufacturing process of the porous film of the present invention.
  • the electromagnetic wave shielding filter of the present invention includes a porous polymer film and metal nanoparticles deposited on the porous polymer film.
  • the metal nanoparticles may be at least one selected from silver, gold, copper, palladium or platinum, and preferably, spherical silver nanoparticles may be applied.
  • silver nanoparticles which are one embodiment of the present invention will be described.
  • the polymer film to be deposited on the silver nanoparticles has a porosity. It was confirmed experimentally that having porosity not only increases the deposition area of silver nanoparticles having electromagnetic shielding ability, but also amplifies shielding of electromagnetic waves by inducing diffuse reflection of electromagnetic waves in the porosity. In other words, simply by increasing the surface area of the silver nanoparticles there is a limit to the high shielding ability, in order to have such a high shielding capacity, a medium capable of working the diffuse reflection of electromagnetic waves, and such a medium can be expressed simply by porous properties It was found experimentally.
  • the polymer film may use various polymer resins capable of producing porosity. However, in view of application to the flexible device, it should have flexible rubber properties and suitable properties for depositing silver nanoparticles. In this respect, many experiments have found that the SBS polymer resin can be complexed by swelling in the silver nanoparticle solution when silver nanoparticles are deposited. In other words, the SBS polymer was found to be the most suitable polymer for the solubility of silver nanoparticles as an experimental result.
  • the SBS polymer is an ABA-type triblock copolymer of styrene and butadiene, and refers to poly (styrene-b-butadiene-b-styrene).
  • One embodiment of the porous SBS polymer film is shown in the SEM photograph of FIG.
  • Silver nanoparticles are deposited on the porous polymer film.
  • the silver nanoparticles may include silver nanowires as well as silver nanoparticles having various shapes such as spherical shape, needle shape, and rod shape.
  • Silver nanoparticles can be used in the range whose diameter is 20-200 nm. It is preferable to use two or more silver nanoparticles having different diameters than to use one size of silver nanoparticles. More preferably, two types of silver nanoparticles having a diameter of 1/2 or less can be used for the silver nanoparticles having a large diameter and the diameter of the large nanoparticles. By using silver nanoparticles having different sizes, the specific surface area can be widened, and thus, high shielding ability can be expressed.
  • silver nanoparticles is the same as the SEM photograph of FIG.
  • Silver nanoparticles may be formed by agglomeration between silver nanoparticles.
  • the aggregated form is not limited thereto as an example of an experiment, and may be implemented in various dispersion forms.
  • Porous SBS polymer of the present invention can be formed by the crystalline sugar mold to be a frame. As shown in Figure 5, the porous SBS polymer is prepared by (a) preparing a crystalline sugar mold; (b) molding and drying the SBS polymer solution in a crystalline sugar mold; And (c) dissolving the crystalline sugar and washing the molded SBS polymer.
  • the crystalline sugar mold may have a spherical crystal shape that is the basis of porosity.
  • SBS polymer molding molded body is prepared by molding a SBS polymer solution of 10 to 30% in crystalline sugar and drying. Thus prepared SBS polymer molding molded body is completely dissolved in crystalline sugar to prepare a porous SBS polymer film.
  • the present invention includes depositing silver nanoparticles on the prepared porous SBS polymer film.
  • Deposition means that the silver nanoparticles are bonded to the porous SBS polymer film to some extent so as not to fall off.
  • Depositing the silver nanoparticles on the porous SBS polymer film may be performed by absorbing the silver nanoparticle precursor in the porous SBS polymer film by immersing the porous SBS polymer film in the silver nanoparticle precursor solution. Absorption of the silver nanoparticle precursor into the porous SBS polymer film can be achieved by the inherent properties of the SBS polymer.
  • the SBS polymer is swelled by a portion of the silver nanoparticle precursor solution, and the silver nanoparticle precursor is partially bonded to the swelled space to complex the polymer-silver nanoparticle precursor.
  • the silver nanoparticle precursor solution may use silver trifluoroacetate of 10 to 20%.
  • the metal nanoparticle precursor solution may include one or more selected from AgNO 3 , AgCl, HAuCl 4 , CuCl 2 , PtCl 2, and PtCl 4 .
  • the silver nanoparticles may be deposited on the porous SBS film by dropping a reducing solution onto the porous SBS polymer film in which the silver nanoparticle precursor is absorbed, thereby reducing the silver nanoparticles to silver nanoparticles.
  • the reducing solution is preferably used 40 to 60% of hydrazine hydrate (Hydrazin hydrate).
  • the prepared porous SBS film in which silver nanoparticles are deposited may be washed 2 to 3 times in distilled water to remove foreign substances and unnecessary solutions, and then dried to prepare an electromagnetic wave shielding filter as a final product.
  • 3 is one embodiment of an electromagnetic wave shielding filter as a final product.
  • the electromagnetic wave filter manufactured according to the embodiment of the present invention shows high shielding ability in the high frequency region as well as the low frequency.
  • the test results showed that excellent shielding power up to 12GHz frequency.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

La présente invention concerne un filtre de blindage contre les ondes électromagnétiques capable d'assurer un blindage, avec une excellente capacité de blindage, contre les ondes électromagnétiques dans un large domaine de fréquence, le filtre de blindage contre les ondes électromagnétiques comprenant : un film polymère poreux; et des nanoparticules d'argent déposées sur la surface du film polymère poreux.
PCT/KR2016/003268 2015-04-27 2016-03-30 Filtre de blindage contre les ondes électromagnétiques et procédé pour le produire WO2016175464A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR20150058951 2015-04-27
KR10-2015-0058951 2015-04-27

Publications (1)

Publication Number Publication Date
WO2016175464A1 true WO2016175464A1 (fr) 2016-11-03

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Application Number Title Priority Date Filing Date
PCT/KR2016/003268 WO2016175464A1 (fr) 2015-04-27 2016-03-30 Filtre de blindage contre les ondes électromagnétiques et procédé pour le produire

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020039658A1 (en) * 1995-01-20 2002-04-04 Bunyan Michael H. Form-in-place EMI gaskets
US20100231433A1 (en) * 2007-12-28 2010-09-16 Tishin Aleksandr Mettalinovich Porous materials embedded with nanoparticles, methods of fabrication and uses thereof
KR20110018707A (ko) * 2009-08-18 2011-02-24 주식회사 스피자 용해성 고체 몰드를 이용한 자전거 부품의 제조방법
JP2012178469A (ja) * 2011-02-25 2012-09-13 Ist Corp 電波吸収体の製造方法、電波吸収体
US20140238736A1 (en) * 2013-02-27 2014-08-28 Cheil Industries Inc. Thermoplastic Resin Composition with EMI Shielding Properties

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020039658A1 (en) * 1995-01-20 2002-04-04 Bunyan Michael H. Form-in-place EMI gaskets
US20100231433A1 (en) * 2007-12-28 2010-09-16 Tishin Aleksandr Mettalinovich Porous materials embedded with nanoparticles, methods of fabrication and uses thereof
KR20110018707A (ko) * 2009-08-18 2011-02-24 주식회사 스피자 용해성 고체 몰드를 이용한 자전거 부품의 제조방법
JP2012178469A (ja) * 2011-02-25 2012-09-13 Ist Corp 電波吸収体の製造方法、電波吸収体
US20140238736A1 (en) * 2013-02-27 2014-08-28 Cheil Industries Inc. Thermoplastic Resin Composition with EMI Shielding Properties

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