KR20100026081A - Sealant composition and fabrication method thereof - Google Patents

Abstract

PURPOSE: A sealant composition is provided to prevent permeation of external O2 or H2O to a cell area in which pixels are present when applied to an organic light-emitting diode. CONSTITUTION: A sealant composition comprises a curable resin and composite nano particles capable of reacting with O2 or H2O, as composite nano particles mixed in the curable resin. The composite nano particles comprise a nano particle core and a polymer coating the nano particle core. A method for preparing the sealant composition includes the steps of: forming composite nano particles in which polymer is coated on at least a part of the surface of the nano particle core by causing polymerization of monomers on the surface of the nano particle core reacting with O2 or H2O; and mixing the composite nano particles with the curable resin.

Description

Sealant composition and its manufacturing method {SEALANT COMPOSITION AND FABRICATION METHOD THEREOF}

The present disclosure relates to sealant compositions and methods of making the same.

Recent advances in the electronics, telecommunications, and biotechnology industries are driving global interest in nanotechnology.

Nanoparticles have potential applications in a variety of fields including material manufacturing, environment and energy, biotechnology, electronics, and medicine. Nanoparticles generally have excellent properties such as light weight, high strength, and high toughness, unlike materials manufactured in the conventional bulk state, and when manufactured in a special formulation, the properties of the material can be controlled according to the application of the material. . In addition to the mechanical properties mentioned above, materials made of nanoparticles also have unique particle properties, ie electrical, optical, magnetic and photoelectric properties.

Nanotechnology can be divided into device, processing and materials technology, and nanomaterial technology can be said to be the technology underlying nanodevices and nanoprocessing. Recently, many techniques for improving device characteristics by applying nanomaterials having unique properties to various devices have been studied.

In one embodiment, the sealant composition comprises a curable resin and composite nanoparticles mixed in the curable resin. The composite nanoparticles can react with O ₂ or H ₂ O and include a nanoparticle core and a polymer that at least partially coats the nanoparticle core.

In one embodiment, a method of making a sealant composition causes polymerization of monomers on the surface of a nanoparticle core that can react with O ₂ or H ₂ O such that the polymer is coated on at least a portion of the surface of the nanoparticle core. Forming the composite nanoparticles and mixing the composite nanoparticles into the curable resin.

The foregoing is provided to introduce a selected example of a technical concept as a simplified form of matters described in more detail in the following detailed description of the disclosure. This disclosure is not intended to indicate key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.

It will be readily understood that the components outlined herein and shown in the drawings of the present disclosure may be arranged and designed in a wide range of different configurations. Accordingly, the following more detailed description of embodiments of the apparatus and method according to the present disclosure, as shown in the drawings, is not intended to limit the scope of the present disclosure as claimed, but only It is merely illustrative of some examples of embodiments in accordance with the disclosure. Embodiments which will be described soon will be best understood by referring to the figures, wherein like parts are generally designated by like reference numerals.

In one embodiment, the sealant composition comprises a curable resin and composite nanoparticles mixed in the curable resin. The composite nanoparticles comprise composite nanoparticles that can react with O ₂ or H ₂ O, and the composite nanoparticles comprise a nanoparticle core and a polymer that at least partially coats the nanoparticle core. In the present disclosure, a nanoparticle core coated at least in part with a polymer is referred to as a "composite nanoparticle".

In one embodiment, the curable resin includes known curable resins, such as photocurable resins or thermosetting resins. In some embodiments, the curable resin includes a UV curable epoxy resin, a thermosetting epoxy resin, a silicone resin or an acrylate. For example, curable resins include phenol novolak epoxy resins, o-cresol novolak epoxy resins, diglycidyl ethers of bisphenol A, bisphenol F, bisphenol S or alkyl substituted bisphenols, glycidylamine epoxy resins, aliphatic epoxy resins, aliphatic Epoxy resins, such as cyclic epoxy resins, and silicone resins, including, but not limited to, organopolysiloxanes or organic polymers including organosiloxanes.

In one embodiment, the composite nanoparticles comprise a nanoparticle core and a polymer surrounding the nanoparticle core. In one embodiment, the nanoparticle core may comprise an inorganic oxide or a metal. In one embodiment, the inorganic oxide may comprise a transparent metal oxide.

For example, nanoparticle cores include nanoparticle cores that can react with O ₂ . For example, a nanoparticle core capable of reacting with O ₂ consists of a metal that reacts with O ₂ to form a metal oxide, such as iron (Fe), cobalt (Co), nickel (Ni), or copper (Cu), or cerium Oxide (CeO _{2 -x} , x is a number greater than 0 and 2 or less) or a combination thereof, but is not limited thereto. The aforementioned nanoparticle core can be prepared by known nanoparticle production methods such as gas evaporation-condensation, gas phase synthesis, precipitation, spray pyrolysis, mechanical grinding, and the like.

In one embodiment, the metal oxide nanoparticle core may be prepared using a metal salt. For example, metal salts are ground with ammonium bicarbonate. The metal hydroxide and ammonium nitrate mixtures produced by grinding are heated to obtain the desired metal oxide nanoparticle cores. As an example, Ce ₂ O _{3 wherein x} in CeO _2- x is 1/2 The manufacturing method of a nanoparticle core is as follows. First, mixing and grinding cerium nitrate (Ce (NO ₃ ) ₃ ) and ammonium bicarbonate (NH ₄ HCO ₃ ) produces cerium hydroxide (Ce (OH) ₃ ) and ammonium nitrate (NH ₄ NO ₃ ). . At this time, excess carbon and oxygen are evaporated into the CO ₂ bubble.

NH ₄ HCO ₃ + Ce (NO ₃ ) ₃ + 9H ₂ O ------> Ce (OH) ₃ ) + NH ₄ NO ₃ + CO ₂ ↑

The cerium hydroxide (Ce (OH) ₃ ) and ammonium nitrate (NH ₄ NO ₃ ) mixture is then baked at about 300 ° C. for about 1 hour. By heating, materials such as, for example, H ₂ O, NO ₂ , N ₂ O, NH ₃ are converted to gas and blown away leaving a cerium oxide (Ce ₂ O ₃ ) nanoparticle core.

In another embodiment, the nanoparticle core may be a nanoparticle core that can react with H ₂ O. For example, the nanoparticle core is zinc oxide (ZnO), silicon oxide (SiO ₂ ), titanium oxide (TiO ₂ ), cadmium oxide (CdO), indium oxide (In ₂ O ₃ ), tin oxide (SnO ₂ ), indium tin It may be made of an oxide (ITO, indium tin oxide) or a combination thereof, but is not limited thereto. The aforementioned nanoparticle cores can be prepared by known methods such as gas evaporation-condensation, gas phase synthesis, precipitation, spray pyrolysis, mechanical grinding, and the like.

In some embodiments, the average diameter of the nanoparticle cores may be about 10 nm to 500 nm, for example, about 30 nm to 200 nm or about 50 nm to 100 nm.

In some embodiments, the nanoparticle core may be made of each of the aforementioned Fe, Co, Ni, Cu, CeO _{2 -x} , ZnO, SiO ₂ , TiO ₂ , CdO, In ₂ O ₃ , SnO ₂ , ITO, and these It may consist of two or more selected materials.

When Fe, Co, Ni, Cu or CeO _{2 -x} described above is included in the sealant, it reacts with external oxygen to generate metal oxides (eg, Fe ₂ O ₃ , CoO, NiO, CuO or CeO ₂ , respectively). May be produced, but not limited thereto, to prevent oxygen from passing through the sealant. ZnO, SiO ₂ , TiO ₂ , CdO, In ₂ O ₃ , SnO ₂ , or ITO react with H ₂ O to form ZnO hydrates (ZnO (H ₂ O) x) and SiO ₂ hydrates (SiO ₂ (H ₂ O), respectively. x), TiO ₂ hydrate (TiO ₂ (H ₂ O) x), CdO hydrate (CdO (H ₂ O) x), In ₂ O ₃ hydrate (In ₂ O ₃ (H ₂ O) x), SnO ₂ Since hydrate (SnO ₂ (H ₂ O) x) or ITO hydrate is produced, H ₂ O can be prevented from passing through the sealant.

The composite nanoparticles comprise a polymer that at least partially coats the surfaces of the nanoparticle cores described above to allow the inorganic oxide nanoparticle cores to mix well with the common curable resins that make up the sealant composition.

The polymer can be any synthetic polymer known in the art. For example, the polymer may be polyamide, polyester, polyether, polyurethane, polyolefin, polyacrylonitrile, polyvinyl chloride, polystyrene, polyacrylate, polymethacrylate, polymethylmethacrylate, polyethylacrylate, It may be selected from the group consisting of polyvinylacetate, polyvinylidene chloride, polytetrafluoroethylene, polysiloxane, polycarbonate, polynorbornene and polyimide, but is not limited thereto.

The polymer may be coated on at least 70%, such as at least 80% or at least 90% of the area of the surface of the inorganic oxide nanoparticle core.

In addition, the polymer on the inorganic oxide nanoparticle core may have a thickness of 1 to 500 nm, such as 5 to 300 nm or 10 to 200 nm.

Nanoparticles of the present disclosure can be prepared by polymerizing monomers on the surface of an inorganic oxide nanoparticle core to produce a polymer coated on at least a portion of the surface of the inorganic oxide nanoparticle core.

The polymer can be any synthetic polymer known in the art. As described above, for example, the polymer may be polyamide, polyester, polyether, polyurethane, polyolefin, polyacrylonitrile, polyvinyl chloride, polystyrene, polymethylmethacrylate, polyvinylacetate, polyvinylidene chloride, Polytetrafluoroethylene, polysiloxane, polycarbonate, polynorbornene and polyimide. The selection and reaction conditions of monomers for the preparation of each polymer are well known to those skilled in the art, for example in Springer-Verlag, 2005, Polymer Synthesis: Theory and Practice, 4th ed., D. Braun et al. Or Oxford University Press, 1999, Polymer Chemistry: An Introduction, 3rd ed., Malcolm P. Stevens.

As a source of monomers, monomer solutions or melts can be used.

Polymerization of the monomer may use radical polymerization, condensation polymerization, anionic polymerization, cationic polymerization, ring-opening polymerization or ring-opening metathesis polymerization (ROMP).

In the polymerization of the monomer, an initiator for initiating the polymerization reaction can be used. In the case of using an initiator, polymerization of the monomer may be performed by 1) mixing an inorganic oxide nanoparticle core with a monomer solution or melt, and then introducing an initiator, or 2) reacting the inorganic oxide nanoparticle core with an initiator to form an inorganic oxide nanoparticle core-initiator. Any method of obtaining a conjugate first and then introducing a monomer such that the conjugate acts as a kind of macroinitiator can be used. The choice of initiator depends on the method of polymerization and the type of monomer to polymerize.

Initiators for radical polymerization include, for example, peroxide compounds such as alkanoyl, aroyl, alkaroyl and arkanoyl diperoxides and monohydroperoxides, azo compounds, peroxyesters, percarbonates, persulfates and redox systems For example, hydrogen peroxide or the above-mentioned peroxide-based compound and iron (II) ions and alcohol and cerium (IV) ions can be mentioned, but are not limited thereto.

Initiators for anionic polymerization include, but are not limited to, metal amides such as KNH ₂ , metal alkyls such as n-butyllithium and triphenylmethylsodium and Grignard reagents such as alkyl magnesium bromide.

Initiators for cationic polymerization are for example Bronsted acids such as hydrochloric acid, sulfuric acid and perchloric acid, Lewis acids such as BF ₃ , AlCl ₃ , TiCl ₄ , SnCl ₄ and ZnCl ₂ , or carbonium ions such as (C ₆ H ₅ ) ₃ C ⁺ X ^- and C ₇ H ₇ ⁺ X ^- (wherein, X ^- is ClO ₄ ^-, SbCl ₆ ^- or PF ₆ ^-), but can include, but is not limited to such.

Initiators for ring-opening polymerization include, but are not limited to, bases such as alkali metal hydroxides and alkoxides and initiators for cation polymerization as mentioned above as initiators for anionic ring-opening polymerization.

Initiators for ring-opening metathesis polymerization are for example Grubbs catalysts, ie benzylidene-bis (tricyclohexylphosphine) dichlororuthenium or benzylidene [1,3-bis (2,4,6-trimethylphenyl) -2 Imidazolidinylidene] dichloro (tricyclohexylphosphine) ruthenium, or Schrock catalyst, i.e. (R "O) ₂ (R'N) Mo (CHR), wherein R is tert-butyl , R 'is 2,6-diisopropylphenyl, and R "is C (CH ₃ ) (CF ₃ ) ₂ ), but is not limited thereto.

The above-described composite nanoparticles are composed of zinc oxide (ZnO, x is a number greater than 0 and 2 or less), cerium oxide (CeO _{2 -x} , x is a number greater than 0 and 2 or less), and silicon oxide having a transparent nanoparticle core ( Composed of inorganic oxides such as SiO ₂ ), titanium oxide (TiO ₂ ), cadmium oxide (CdO), indium oxide (In ₂ O ₃ ), tin oxide (SnO ₂ ), or indium tin oxide (ITO) Not only can it be included in sealant compositions used in electronic devices such as organic light emitting diodes (OLEDs) or dye-sensitized solar cells (DSSCs), but these inorganic oxide nanoparticles generally have a volume change with temperature changes. Since it is not large compared with the curable resin which consists of a polymer used for the sealant composition, the problem that a sealant deteriorates by the continuous use of an electronic device can be alleviated significantly. In addition, the composite nanoparticles can be mixed well with a general curable resin made of a polymer by a polymer formed at least partially on the surface of the nanoparticle core.

Hereinafter, an embodiment of an electronic device including the above-described sealant will be described. The electronic device includes a dye-sensitized solar cell (DSSC) or an organic light emitting diode (OLED). However, it will be apparent to those skilled in the art if the electronic device may include a sealant, but is not limited to the above-described dye-sensitized solar cell and organic light emitting diode.

In one embodiment, the dye-sensitized solar cell 100 may have a structure as shown in FIG. 1. Referring to FIG. 1, a transparent conductive film 110 serving as a lower electrode on the transparent substrate 105 and a porous film 120 are formed on the transparent conductive film 110. In one embodiment, the porous membrane 120 may be formed by uniformly applying and heating titanium oxide particles, for example. The dye is adsorbed on the porous membrane 120 to form the dye layer 130. The transparent substrate 105, the transparent conductive film 110, the porous film 120, and the dye layer 130 described above are referred to as a first substrate 135. The second substrate 135a and the first substrate 135 on which the second transparent conductive film 110a serving as the upper electrode is formed on the second transparent substrate 100a are bonded by the sealant 140. The electrolyte 150 is disposed in the gap formed by both the substrate and the sealant 140. The mechanism for generating electricity of a solar cell having such a structure is, for example, when light is irradiated onto the transparent substrate 100, the dye 130 absorbs light to emit electrons. Electrons move to the porous membrane 120 and are transferred to the lower electrode 110. In addition, the electrons move to the second transparent conductive film 110a as the upper electrode to reduce ions in the electrolyte 150. The reduced ions are oxidized again on the pigment 130. This is repeated to generate electricity. In one embodiment, electrolyte 150 comprises an organic solvent or polymer. The sealant 140 is disposed between the upper and lower electrodes to prevent the electrolyte 150 from leaking from the cell.

In one embodiment, the sealant 160 includes a curable resin and composite nanoparticles mixed in the curable resin. The composite nanoparticles comprise composite nanoparticles that can react with O ₂ or H ₂ O, and the composite nanoparticles comprise a nanoparticle core and a polymer that at least partially coats the nanoparticle core.

In one embodiment, the curable resin includes known curable resins, such as photocurable resins or thermosetting resins. In some embodiments, the curable resin includes a UV curable epoxy resin, a thermosetting epoxy resin, a silicone resin or an acrylate. For example, curable resins include phenol novolak epoxy resins, o-cresol novolak epoxy resins, diglycidyl ethers of bisphenol A, bisphenol F, bisphenol S or alkyl substituted bisphenols, glycidylamine epoxy resins, aliphatic epoxy resins, aliphatic Epoxy resins, such as cyclic epoxy resins, and silicone resins, including, but not limited to, organopolysiloxanes or organic polymers including organosiloxanes.

In one embodiment, the composite nanoparticles comprise a nanoparticle core and a polymer surrounding the nanoparticle core. In one embodiment, the nanoparticle core may comprise an inorganic oxide or a metal. In one embodiment, the inorganic oxide may comprise a transparent metal oxide.

For example, nanoparticle cores include nanoparticle cores that can react with O ₂ . For example, a nanoparticle core capable of reacting with O ₂ consists of a metal or cerium oxide (CeO _{2 -x} , x is a number greater than 0 and less than 2) comprising Fe, Co, Ni, or Cu, or a combination thereof. Can be. The aforementioned nanoparticle core can be prepared by known nanoparticle production methods such as gas evaporation-condensation, gas phase synthesis, precipitation, spray pyrolysis, mechanical grinding, and the like.

In another embodiment, the nanoparticle core may be a nanoparticle core that can react with H ₂ O. For example, the nanoparticle core is zinc oxide (ZnO), silicon oxide (SiO ₂ ), titanium oxide (TiO ₂ ), cadmium oxide (CdO), indium oxide (In ₂ O ₃ ), tin oxide (SnO ₂ ), indium tin Indium tin oxide (ITO), or a combination thereof. The aforementioned nanoparticle cores can be prepared by known methods such as gas evaporation-condensation, gas phase synthesis, precipitation, spray pyrolysis, mechanical grinding, and the like.

In some embodiments, the average diameter of the nanoparticle cores may be about 10 nm to 500 nm, for example, about 30 nm to 200 nm or about 50 nm to 100 nm.

In some embodiments, the nanoparticle core may be made of each of the aforementioned Fe, Co, Ni, Cu, CeO _{2 -x} , ZnO, SiO ₂ , TiO ₂ , CdO, In ₂ O ₃ , SnO ₂ , ITO, and these It may consist of two or more selected materials. When Fe, Co, Ni, Cu, or CeO _{2 -x} described above is included in the sealant, it may react with external oxygen to produce Fe ₂ O ₃ , CoO, NiO, CuO, or CeO ₂ , respectively, so that oxygen is sealed. It can be prevented from passing through the agent. ZnO, SiO ₂ , TiO ₂ , CdO, In ₂ O ₃ , SnO ₂ , or ITO react with H ₂ O to form ZnO hydrates (ZnO (H ₂ O) x) and SiO ₂ hydrates (SiO ₂ (H ₂ O), respectively. x), TiO ₂ hydrate (TiO ₂ (H ₂ O) x), CdO hydrate (CdO (H ₂ O) x), In ₂ O ₃ hydrate (In ₂ O ₃ (H ₂ O) x), SnO ₂ Since hydrate (SnO ₂ (H ₂ O) x) or ITO hydrate is produced, H ₂ O can be prevented from passing through the sealant.

The composite nanoparticles comprise a polymer that at least partially coats the surfaces of the nanoparticle cores described above to allow the inorganic oxide nanoparticle cores to mix well with the common curable resins that make up the sealant composition.

The polymer can be any synthetic polymer known in the art. For example, the polymer may be polyamide, polyester, polyether, polyurethane, polyolefin, polyacrylonitrile, polyvinyl chloride, polystyrene, polyacrylate, polymethacrylate, polymethylmethacrylate, polyethylacrylate, It may be selected from the group consisting of polyvinylacetate, polyvinylidene chloride, polytetrafluoroethylene, polysiloxane, polycarbonate, polynorbornene and polyimide, but is not limited thereto.

The polymer may be coated on at least 70%, such as at least 80% or at least 90% of the area of the surface of the inorganic oxide nanoparticle core. In addition, the polymer on the inorganic oxide nanoparticle core may have a thickness of 1 to 500 nm, such as 5 to 300 nm or 10 to 200 nm.

In another embodiment, an organic light emitting diode comprising the sealant composition described above is provided. 2 illustrates an organic light emitting diode 200 according to one embodiment. In one embodiment, the organic light emitting diode 200 includes a substrate 205 on which pixels are formed. In some embodiments, the substrate 205 includes, but is not limited to, a glass or ceramic substrate as a transparent material. The organic light emitting diode pixels include one or more organic layers 230 disposed between the upper 210 and the lower electrodes 220. The organic light emitting diode pixels may be formed in the cell region of the substrate. Operation of the organic light emitting diode 200 is performed by charge carriers being injected and recombined through the upper and lower electrodes into the organic layer 230 disposed therebetween. Recombination of the charge carriers causes the organic layer 230 to emit light.

A cap 260 is provided to seal the organic light emitting diode pixels. Cap 260 is formed on substrate 205 to form cavity 250 between the pixels. A sealant 240 is provided around the cap edge where the cap 260 is in contact with the substrate 205. The sealant 240 may prevent external O ₂ or H ₂ O from penetrating into the cell region in which the pixel is present.

In one embodiment, the sealant 240 comprises a curable resin and composite nanoparticles mixed in the curable resin. The composite nanoparticles comprise composite nanoparticles that can react with O ₂ or H ₂ O, and the composite nanoparticles comprise a nanoparticle core and a polymer that at least partially coats the nanoparticle core.

In one embodiment, the curable resin includes known curable resins, such as photocurable resins or thermosetting resins. In some embodiments, the curable resin includes a UV curable epoxy resin, a thermosetting epoxy resin, a silicone resin or an acrylate. For example, curable resins include phenol novolak epoxy resins, o-cresol novolak epoxy resins, diglycidyl ethers of bisphenol A, bisphenol F, bisphenol S or alkyl substituted bisphenols, glycidylamine epoxy resins, aliphatic epoxy resins, aliphatic Epoxy resins, such as cyclic epoxy resins, and silicone resins, including, but not limited to, organopolysiloxanes or organic polymers including organosiloxanes.

In one embodiment, the composite nanoparticles comprise a nanoparticle core and a polymer surrounding the nanoparticle core. In one embodiment, the nanoparticle core may comprise an inorganic oxide or a metal. In one embodiment, the inorganic oxide may comprise a transparent metal oxide.

For example, nanoparticle cores include nanoparticle cores that can react with O ₂ . For example, a nanoparticle core capable of reacting with O ₂ consists of a metal or cerium oxide (CeO _{2 -x} , x is a number greater than 0 and less than 2) comprising Fe, Co, Ni, or Cu, or a combination thereof. Can be. The aforementioned nanoparticle core can be prepared by known nanoparticle production methods such as gas evaporation-condensation, gas phase synthesis, precipitation, spray pyrolysis, mechanical grinding, and the like.

In another embodiment, the nanoparticle core may be a nanoparticle core that can react with H ₂ O. For example, the nanoparticle core is zinc oxide (ZnO), silicon oxide (SiO ₂ ), titanium oxide (TiO ₂ ), cadmium oxide (CdO), indium oxide (In ₂ O ₃ ), tin oxide (SnO ₂ ), indium tin Indium tin oxide (ITO) or a combination thereof. The aforementioned nanoparticle cores can be prepared by known methods such as gas evaporation-condensation, gas phase synthesis, precipitation, spray pyrolysis, mechanical grinding, and the like.

In some embodiments, the average diameter of the nanoparticle cores may be about 10 nm to about 500 nm, such as about 30 nm to about 200 nm or about 50 nm to about 100 nm.

In some embodiments, the nanoparticle core may be made of each of the aforementioned Fe, Co, Ni, Cu, CeO _{2 -x} , ZnO, SiO ₂ , TiO ₂ , CdO, In ₂ O ₃ , SnO ₂ , ITO, and these It may consist of two or more selected materials. When Fe, Co, Ni, Cu, or CeO _{2 -x} described above is included in the sealant, it may react with external oxygen to produce Fe ₂ O ₃ , CoO, NiO, CuO, or CeO ₂ , respectively, so that oxygen is sealed. It can be prevented from passing through the agent. ZnO, SiO ₂ , TiO ₂ , CdO, In ₂ O ₃ , SnO ₂ , or ITO react with H ₂ O to form ZnO hydrates (ZnO (H ₂ O) x), SiO ₂ hydrates (SiO ₂ (H ₂₎ O) x), TiO ₂ hydrate (TiO ₂ (H ₂ O) x), CdO hydrate (CdO (H ₂ O) x), In ₂ O ₃ hydrate (In ₂ O ₃ (H ₂ O) x), SnO _Since dihydrate (SnO ₂ (H ₂ O) x) or ITO hydrate is produced, H ₂ O can be prevented from passing through the sealant.

The composite nanoparticles comprise a polymer that at least partially coats the surfaces of the nanoparticle cores described above to allow the inorganic oxide nanoparticle cores to mix well with the common curable resins that make up the sealant composition.

The polymer can be any synthetic polymer known in the art. For example, the polymer may be polyamide, polyester, polyether, polyurethane, polyolefin, polyacrylonitrile, polyvinyl chloride, polystyrene, polyacrylate, polymethacrylate, polymethylmethacrylate, polyethylacrylate, It may be selected from the group consisting of polyvinylacetate, polyvinylidene chloride, polytetrafluoroethylene, polysiloxane, polycarbonate, polynorbornene and polyimide, but is not limited thereto.

The polymer may be coated on at least 70%, such as at least 80% or at least 90% of the area of the surface of the inorganic oxide nanoparticle core. In addition, the polymer on the inorganic oxide nanoparticle core may have a thickness of 1 to 500 nm, such as 5 to 300 nm or 10 to 200 nm.

From the foregoing, specific embodiments of the present disclosure have been described herein for purposes of illustration, and it will be understood that various changes may be made without departing from the spirit and scope of the present disclosure. Accordingly, the described embodiments are to be considered in all respects as illustrative and not restrictive. Therefore, the scope of the present disclosure is to be designated only by the appended claims and not by the above description. All changes that come within the meaning and range of equivalency of the appended claims are to be embraced within their scope.

1 is a schematic view showing a portion of a dye-sensitized solar cell according to one embodiment.

2 is a schematic diagram illustrating a portion of an organic light emitting diode according to an embodiment.

Claims (28)

In the sealant composition, Curable resins; And A composite nanoparticle mixed in the curable resin, the composite nanoparticles that can react with O ₂ or H ₂ O, Wherein said composite nanoparticle comprises a nanoparticle core and a polymer at least partially coating said nanoparticle core. The sealant composition of claim 1, wherein the curable resin comprises a thermosetting resin or a photocurable resin. The sealant composition of claim 1, wherein the nanoparticle core comprises an inorganic oxide or a metal. The method of claim 3, wherein the inorganic oxide is cerium oxide (CeO _{2 -x} , x is a number greater than 0 and less than 2), zinc oxide (ZnO), silicon oxide (SiO ₂ ), titanium oxide (TiO ₂ ), cadmium oxide ( CdO), indium oxide (In ₂ O ₃ ), tin oxide (SnO ₂ ), or indium tin oxide (ITO) consisting of one or a combination selected from the group consisting of, the metal is iron (Fe ), Cobalt (Co), nickel (Ni) or copper (Cu). The nanoparticle core of claim 4, wherein the nanoparticle core is iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), or CeO _{2 -x} (x is a number greater than 0 and less than or equal to 2). The core composition reacts with O ₂ to produce iron oxide, cobalt oxide, nickel oxide, copper oxide, or CeO ₂ . The method of claim 4, wherein the nanoparticle core is made of ZnO, TiO ₂ , SiO ₂ , CdO, In ₂ O ₃ , SnO ₂ , or ITO, and the nanoparticle core generates a hydrate when reacted with H ₂ O. Sealant composition. The sealant composition of claim 1, wherein the nanoparticle core has an average diameter of about 30 to 200 nm. The polymer according to claim 1 or 2, wherein the polymer is polyamide, polyester, polyether, polyurethane, polyolefin, polyacrylonitrile, polyvinyl chloride, polystyrene, polyacrylate, polymethacrylate, polymethyl Sealant composition selected from the group consisting of methacrylate, polyethyl acrylate, polyvinylacetate, polyvinylidene chloride, polytetrafluoroethylene, polysiloxane, polycarbonate, polynorbornene and polyimide. The sealant composition of claim 1, wherein the polymer is coated on at least 70% of the area of the nanoparticle core. The sealant composition according to claim 1 or 2, wherein the sealant composition is used in an electronic device or a semiconductor device. The sealant composition according to claim 1 or 2, wherein the sealant composition is used in an organic light emitting diode (OLED) or a dye-sensitized solar cell (DSSC). Nanoparticle cores capable of reacting with O ₂ or H ₂ O; And A polymer that at least partially coats the nanoparticle core Composite nanoparticles comprising a. The composite nanoparticle of claim 12, wherein the nanoparticle core comprises an inorganic oxide or a metal. The method of claim 13, wherein the inorganic oxide is cerium oxide (CeO _{2 -x} , x is a number greater than 0 and less than 2), zinc oxide (ZnO), silicon oxide (SiO ₂ ), titanium oxide (TiO ₂ ), cadmium oxide ( CdO), indium oxide (In ₂ O ₃ ), tin oxide (SnO ₂ ), or indium tin oxide (ITO) consisting of one or a combination selected from the group consisting of, the metal is iron (Fe) , Composite nanoparticles selected from cobalt (Co), nickel (Ni) or copper (Cu). The method of claim 12, wherein the nanoparticle core is iron (Fe), cobalt (Co), nickel (Ni), copper (Cu) or CeO _{2 -x} (x is a number greater than 0 and less than 2), the nanoparticles The core is a composite nanoparticle which, when reacted with O ₂ , produces iron oxide, cobalt oxide, nickel oxide, copper oxide or CeO ₂ . The method of claim 12, wherein the nanoparticle core is made of ZnO, TiO ₂ , SiO ₂ , CdO, In ₂ O ₃ , SnO ₂ , or ITO, and the nanoparticle core produces a hydrate when reacted with H ₂ O. Composite nanoparticles. The composite nanoparticle of claim 12, wherein the nanoparticle core has an average diameter of about 30 to 200 nm. The polymer according to any one of claims 12 to 16, wherein the polymer is polyamide, polyester, polyether, polyurethane, polyolefin, polyacrylonitrile, polyvinyl chloride, polystyrene, polyacrylate, polymethacryl. A composite nanoparticle selected from the group consisting of latex, polymethyl methacrylate, polyethyl acrylate, polyvinylacetate, polyvinylidene chloride, polytetrafluoroethylene, polysiloxane, polycarbonate, polynorbornene and polyimide. The composite nanoparticle of claim 12, wherein the polymer is coated on at least 70% of the area of the nanoparticle core. As a dye-sensitized solar cell (DSSC), A sealant for bonding the upper and lower conductive layers; And An electrolyte disposed in the gap between the upper and lower conductive layers by the sealant, The sealant is a composite nanoparticle mixed with the curable resin and the curable resin, and includes the composite nanoparticles capable of reacting with O ₂ or H ₂ O, The composite nanoparticles dye-sensitized solar cell comprising a nanoparticle core and a polymer at least partially coating the nanoparticle core. As an organic light emitting diode (OLED), A pixel region disposed on the substrate; A cap for protecting the pixel area; And A sealant disposed between the cap and the substrate to seal the pixel region, The sealant is a composite nanoparticle mixed with the curable resin and the curable resin, and includes the composite nanoparticles capable of reacting with O ₂ or H ₂ O, Wherein said composite nanoparticle comprises a nanoparticle core and a polymer at least partially coating said nanoparticle core. As a method of preparing a sealant composition, Polymerizing the monomer on the surface of the nanoparticle core capable of reacting with O ₂ or H ₂ O to form a polymer-coated composite nanoparticle on at least a portion of the surface of the nanoparticle core; And Mixing the composite nanoparticles with a curable resin Method for producing a sealant composition comprising a. The method of claim 22, wherein the curable resin comprises a thermosetting resin or a photocurable resin. The method of claim 22, wherein the nanoparticle core comprises an inorganic oxide or a metal. The method of claim 24, wherein the inorganic oxide is cerium oxide (CeO _{2 -x} , x is a number greater than 0 and less than 2), zinc oxide (ZnO), silicon oxide (SiO ₂ ), titanium oxide (TiO ₂ ), cadmium oxide ( CdO), indium oxide (In ₂ O ₃ ), tin oxide (SnO ₂ ), or indium tin oxide (ITO) consisting of one or a combination selected from the group consisting of, the metal is iron (Fe) , Cobalt (Co), nickel (Ni) or copper (Cu). 26. The polymer of any of claims 22 to 25 wherein the polymer is polyamide, polyester, polyether, polyurethane, polyolefin, polyacrylonitrile, polyvinyl chloride, polystyrene, polyacrylate, polymethacryl Method for producing a sealant composition selected from the group consisting of latex, polymethyl methacrylate, polyethyl acrylate, polyvinylacetate, polyvinylidene chloride, polytetrafluoroethylene, polysiloxane, polycarbonate, polynorbornene and polyimide . 26. The method of claim 22, wherein the polymer is coated on at least 70% of the area of the nanoparticle core. The method of claim 22, wherein the forming of the composite nanoparticles is Binding an initiator on the surface of the nanoparticle core to form a nanoparticle core-initiator conjugate; And Introducing a monomer to cause a polymerization reaction on the surface of the nanoparticle core-initiator conjugate.

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