Patent
US 8,178,201ELECTROCONDUCTIVE PARTICLE AND ANISOTROPIC CONDUCTIVE FILM COMPRISING SAME
Sang-Soo LEE
US
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Patent
Atlas literature
Patent
US 8,178,201Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
An electroconductive particle comprising: (a) a polymer microparticle comprising a plurality of first functional groups, and (b) a graphene coating layer comprising a plurality of second functional groups, the graphene coating la y er grafted on the polymer microparticle vi a chemical bond formation between the first and second functional groups.
The electroconductive particle according to claim 1, wherein the relative weight ratio of the polymer microparticle and the graphene coating layer is 20:80 to 99.9:0.1.
The electroconductive particle according to claim 1, wherein the polymer microparticle is a polystyrene-based, [[polymetacrylate-based]] polymethacrylate-based, or polyacrylate-based polymer microparticle.
The electroconductive particle according to claim 1, wherein the electroconductive particle has an average particle size of 0.1 to 10 pm.
Page 8 of 13 Application Serial No. 12/579,791 PATENT Reply to non-final office action of Docket: CU-9181 15. An anisotropic conductive film comprising the electroconductive particle according to claim 1.
2.
The electroconductive particle according to claim [[2]] 1, wherein the first functional groups are those capable of undergoing a condensation reaction or an ionic fun c tiona l groups coupling interaction.
The electroconductive particle according to claim [[3]] 1, wherein the oenfirst functional groups are selected from the group consisting of carboxyl (-COOH), hydroxyl (-OH), alkoxyearbony4 ester (-COOR '), amin o amine (-NH₂), and thiexy thiol (-SH), wherein R ' being C 1-C₁₀ alkyl, phenyl, or benzyl.
Page 6 of 13 Application Serial No. 12/579,791 PATENT Reply to non-final office action of Docket: CU-91 81 5. The electroconductive particle according to claim [[3]] 1, wherein the [[ionic]] first functional groups are ea ch ndepndenty selected from the group consisting of carboxyl, hydroxyl, sulfonyl, quaternary ammonium, and amin e amine.
The electroconductive particle according to claim [[2]] 1, wherein the second functional groups of the graphene coating layer are capable of forming[[:]] covalent bonds with the condensatin-reaetve first functional groups of the polymer microparticle [[;]] or capable of forming ionic bonds with the [[ionic]] firs t functional groups of the polymer microparticle.
The electroconductive particle according to claim 6, wherein the second functional groups tha t can form ionic bonds with the ionic functional g roups are ea c h i ndependently selected from the group consisting of carboxyl, hydroxyl, sulfonyl, quaternary ammonium, and amin o amine.
The electroconductive particle according to claim [[6]] 1, wherein the second functional groups that can form covalent bonds with the condcnsation reactive functional g roup s ara each indcpcndcntly a re selected from the group consisting of carboxyl (-COOH), alkexyearbony4 ester (-COOR '), amin o amine (-NH₂), and thioxy thiol (-SH), wherein R ' being C 1-C1o alkyl, phenyl, or benzyl.
Page 7 of 13 Application Serial No. 12/579,791 PATENT Reply to non-final office action of Docket: CU-9181 9. The electro conductive particle according to claim [[2]] 1, wherein the chemical bonds are covalent bonds or ionic bonds.
The electroconductive particle according to claim 9, wherein the covalent bonds eaeh eemprises comprise an ester bonding (-COO-), amide bonding (-CONH-), or disulfide bonding (-S-S-) moiety.
The electroconductive particle according to claim 9, wherein the ionic bonds are each formed through ionic interactions between-N R₂₃ and-COO -, -O-, or -S3, wherein R₂ being hydrogen, C 1-C₁₀ alkyl, or C 6-C 12 aryl.
A method for preparing an electroconductive particle comprising: providing a polymer microparticle that comprises a plurality of first functional groups attached thereon; introducing to a surface of graphene a plurality of second functional groups; and grafting together the graphene to the polymer microparticle via chemical bond formation between the first and second functional groups in a dispersion medium.
The method of claim 16, wherein providing step comprises: mixing together a dispersing agent, a first monomer, an auxiliary monomer, a crosslinking agent into a solvent to form an initial mixture; adding a polymerization initiator into the initial mixture to form a polymerization mixture; quenching the polymerization mixture to obtain the polymer microparticle; washing the polymer microparticle; isolating the polymer microparticle from the solvent; and lyophilizing the polymer microparticle into a powder form.
The method of claim 16, wherein the introducing step comprises: Page 9 of 13 Application Serial No. 12/579,791 PATENT Reply to non-final office action of Docket: CU-9181 pulverizing graphite; oxidizing the pulverized graphite; and reducing the oxidized pulverized graphite to obtain the graphene.
The method of claim 16, wherein the grafting comprises mixing together the polymer microparticle and the graphene to graph together the graphene to the polymer microparticle via chemical bond formation between the first and second functional groups.
The method of claim 16, wherein the first monomer is selected from the group consisting of styrene, p- hydroxystyrene, p-acetoxystyrene, p-carboxylstyrene, a -methylstyrene, a-chlorostyrene, p-tert-butylstyrene, p-methylstyrene, p-chlorostyrene, o- chlorostyrene, 2,5-dichlorostyrene, 3,4-dich l orostyrene, dimethylstyrene, divinylbenzene, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, butyl acrylate, butyl methacrylate and mixtures thereof; the auxiliary monomer is selected from the group consisting of p- hydroxystyrene, p-acetoxystyrene, p-carboxylstyrene, metacryloxyethyl trimethylammoniumchloride, polyethyleneglycol methylmetacrylate, polyethyleneglycol methylethermetacrylate, polyethyleneglycol methacrylate, polypropylene glycol methacrylate, polypropylene glycol dimethacrylate, and mixtures thereof; Page 10 of 13 Application Serial No. 12/579,791 PATENT Reply to non-final office action of Docket: CU-91 81 the crosslinking agent is selected from the group consisting of divinylbenzene, styrene-based materials, acryl-based materials, and methacryl- based olephilic materials; the polymerization initiator is selected from the group consisting of calcium persulfate, ammonium persulfate, and sodium persulfate, hydrogen peroxide, benzoyl peroxide, lauryl peroxide, azobisisobutyronitril (AIBN) and azobisformamide; the dispensing agent is selected from the group consisting of polyvinylpyrrolidone, polyvinylacetate, and hydroxypropyl-cellulose butyl acrylate; and the solvent is selected from the group consisting of water, dimethylsulfoxide (DMSO), tetrahydrofuran (THF), dimethyformamide (DMF), ethanol, methanol, isopropanol, propanol, butanol, pentanol, hexanol, heptanol, cyclohexanol, benzene, xylene, toluene, cyclohexane.
The method of claim 16, wherein the dispersion of distilled water, isopropanol, ethanol, methanol, cyclohexane, propyleneglycol monomethyletheracetate, methylethylketone. medium is selected from the group consisting butanol, chloroform, diethylether, hexane, cyclotetrahydrofuran, and
Layer stacks claimed or described, ordered top of device to substrate.
electroconductive particle
anisotropic conductive film
Materials described outside the worked examples.
polymer microparticle
graphene coating layer
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
durability, thermal resistance, as well as 25 electroconductivity, which comprises a graphene coating layer having excellent electroconductivity disposed on a polymer microparticle. According to one embodiment of the present invention, there is provided an ele
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Average Particle Size | 0.1–10 um | — |
Weight Ratio Polymer To Graphene | — | — |
Temperature |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 8,178,201Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
An electroconductive particle comprising: (a) a polymer microparticle comprising a plurality of first functional groups, and (b) a graphene coating layer comprising a plurality of second functional groups, the graphene coating la y er grafted on the polymer microparticle vi a chemical bond formation between the first and second functional groups.
The electroconductive particle according to claim 1, wherein the relative weight ratio of the polymer microparticle and the graphene coating layer is 20:80 to 99.9:0.1.
The electroconductive particle according to claim 1, wherein the polymer microparticle is a polystyrene-based, [[polymetacrylate-based]] polymethacrylate-based, or polyacrylate-based polymer microparticle.
The electroconductive particle according to claim 1, wherein the electroconductive particle has an average particle size of 0.1 to 10 pm.
Page 8 of 13 Application Serial No. 12/579,791 PATENT Reply to non-final office action of Docket: CU-9181 15. An anisotropic conductive film comprising the electroconductive particle according to claim 1.
2.
The electroconductive particle according to claim [[2]] 1, wherein the first functional groups are those capable of undergoing a condensation reaction or an ionic fun c tiona l groups coupling interaction.
The electroconductive particle according to claim [[3]] 1, wherein the oenfirst functional groups are selected from the group consisting of carboxyl (-COOH), hydroxyl (-OH), alkoxyearbony4 ester (-COOR '), amin o amine (-NH₂), and thiexy thiol (-SH), wherein R ' being C 1-C₁₀ alkyl, phenyl, or benzyl.
Page 6 of 13 Application Serial No. 12/579,791 PATENT Reply to non-final office action of Docket: CU-91 81 5. The electroconductive particle according to claim [[3]] 1, wherein the [[ionic]] first functional groups are ea ch ndepndenty selected from the group consisting of carboxyl, hydroxyl, sulfonyl, quaternary ammonium, and amin e amine.
The electroconductive particle according to claim [[2]] 1, wherein the second functional groups of the graphene coating layer are capable of forming[[:]] covalent bonds with the condensatin-reaetve first functional groups of the polymer microparticle [[;]] or capable of forming ionic bonds with the [[ionic]] firs t functional groups of the polymer microparticle.
The electroconductive particle according to claim 6, wherein the second functional groups tha t can form ionic bonds with the ionic functional g roups are ea c h i ndependently selected from the group consisting of carboxyl, hydroxyl, sulfonyl, quaternary ammonium, and amin o amine.
The electroconductive particle according to claim [[6]] 1, wherein the second functional groups that can form covalent bonds with the condcnsation reactive functional g roup s ara each indcpcndcntly a re selected from the group consisting of carboxyl (-COOH), alkexyearbony4 ester (-COOR '), amin o amine (-NH₂), and thioxy thiol (-SH), wherein R ' being C 1-C1o alkyl, phenyl, or benzyl.
Page 7 of 13 Application Serial No. 12/579,791 PATENT Reply to non-final office action of Docket: CU-9181 9. The electro conductive particle according to claim [[2]] 1, wherein the chemical bonds are covalent bonds or ionic bonds.
The electroconductive particle according to claim 9, wherein the covalent bonds eaeh eemprises comprise an ester bonding (-COO-), amide bonding (-CONH-), or disulfide bonding (-S-S-) moiety.
The electroconductive particle according to claim 9, wherein the ionic bonds are each formed through ionic interactions between-N R₂₃ and-COO -, -O-, or -S3, wherein R₂ being hydrogen, C 1-C₁₀ alkyl, or C 6-C 12 aryl.
A method for preparing an electroconductive particle comprising: providing a polymer microparticle that comprises a plurality of first functional groups attached thereon; introducing to a surface of graphene a plurality of second functional groups; and grafting together the graphene to the polymer microparticle via chemical bond formation between the first and second functional groups in a dispersion medium.
The method of claim 16, wherein providing step comprises: mixing together a dispersing agent, a first monomer, an auxiliary monomer, a crosslinking agent into a solvent to form an initial mixture; adding a polymerization initiator into the initial mixture to form a polymerization mixture; quenching the polymerization mixture to obtain the polymer microparticle; washing the polymer microparticle; isolating the polymer microparticle from the solvent; and lyophilizing the polymer microparticle into a powder form.
The method of claim 16, wherein the introducing step comprises: Page 9 of 13 Application Serial No. 12/579,791 PATENT Reply to non-final office action of Docket: CU-9181 pulverizing graphite; oxidizing the pulverized graphite; and reducing the oxidized pulverized graphite to obtain the graphene.
The method of claim 16, wherein the grafting comprises mixing together the polymer microparticle and the graphene to graph together the graphene to the polymer microparticle via chemical bond formation between the first and second functional groups.
The method of claim 16, wherein the first monomer is selected from the group consisting of styrene, p- hydroxystyrene, p-acetoxystyrene, p-carboxylstyrene, a -methylstyrene, a-chlorostyrene, p-tert-butylstyrene, p-methylstyrene, p-chlorostyrene, o- chlorostyrene, 2,5-dichlorostyrene, 3,4-dich l orostyrene, dimethylstyrene, divinylbenzene, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, butyl acrylate, butyl methacrylate and mixtures thereof; the auxiliary monomer is selected from the group consisting of p- hydroxystyrene, p-acetoxystyrene, p-carboxylstyrene, metacryloxyethyl trimethylammoniumchloride, polyethyleneglycol methylmetacrylate, polyethyleneglycol methylethermetacrylate, polyethyleneglycol methacrylate, polypropylene glycol methacrylate, polypropylene glycol dimethacrylate, and mixtures thereof; Page 10 of 13 Application Serial No. 12/579,791 PATENT Reply to non-final office action of Docket: CU-91 81 the crosslinking agent is selected from the group consisting of divinylbenzene, styrene-based materials, acryl-based materials, and methacryl- based olephilic materials; the polymerization initiator is selected from the group consisting of calcium persulfate, ammonium persulfate, and sodium persulfate, hydrogen peroxide, benzoyl peroxide, lauryl peroxide, azobisisobutyronitril (AIBN) and azobisformamide; the dispensing agent is selected from the group consisting of polyvinylpyrrolidone, polyvinylacetate, and hydroxypropyl-cellulose butyl acrylate; and the solvent is selected from the group consisting of water, dimethylsulfoxide (DMSO), tetrahydrofuran (THF), dimethyformamide (DMF), ethanol, methanol, isopropanol, propanol, butanol, pentanol, hexanol, heptanol, cyclohexanol, benzene, xylene, toluene, cyclohexane.
The method of claim 16, wherein the dispersion of distilled water, isopropanol, ethanol, methanol, cyclohexane, propyleneglycol monomethyletheracetate, methylethylketone. medium is selected from the group consisting butanol, chloroform, diethylether, hexane, cyclotetrahydrofuran, and
Layer stacks claimed or described, ordered top of device to substrate.
electroconductive particle
anisotropic conductive film
Materials described outside the worked examples.
polymer microparticle
graphene coating layer
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
durability, thermal resistance, as well as 25 electroconductivity, which comprises a graphene coating layer having excellent electroconductivity disposed on a polymer microparticle. According to one embodiment of the present invention, there is provided an ele
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Average Particle Size | 0.1–10 um | — |
Weight Ratio Polymer To Graphene | — | — |
Temperature |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 8,178,201Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
An electroconductive particle comprising: (a) a polymer microparticle comprising a plurality of first functional groups, and (b) a graphene coating layer comprising a plurality of second functional groups, the graphene coating la y er grafted on the polymer microparticle vi a chemical bond formation between the first and second functional groups.
The electroconductive particle according to claim 1, wherein the relative weight ratio of the polymer microparticle and the graphene coating layer is 20:80 to 99.9:0.1.
The electroconductive particle according to claim 1, wherein the polymer microparticle is a polystyrene-based, [[polymetacrylate-based]] polymethacrylate-based, or polyacrylate-based polymer microparticle.
The electroconductive particle according to claim 1, wherein the electroconductive particle has an average particle size of 0.1 to 10 pm.
Page 8 of 13 Application Serial No. 12/579,791 PATENT Reply to non-final office action of Docket: CU-9181 15. An anisotropic conductive film comprising the electroconductive particle according to claim 1.
2.
The electroconductive particle according to claim [[2]] 1, wherein the first functional groups are those capable of undergoing a condensation reaction or an ionic fun c tiona l groups coupling interaction.
The electroconductive particle according to claim [[3]] 1, wherein the oenfirst functional groups are selected from the group consisting of carboxyl (-COOH), hydroxyl (-OH), alkoxyearbony4 ester (-COOR '), amin o amine (-NH₂), and thiexy thiol (-SH), wherein R ' being C 1-C₁₀ alkyl, phenyl, or benzyl.
Page 6 of 13 Application Serial No. 12/579,791 PATENT Reply to non-final office action of Docket: CU-91 81 5. The electroconductive particle according to claim [[3]] 1, wherein the [[ionic]] first functional groups are ea ch ndepndenty selected from the group consisting of carboxyl, hydroxyl, sulfonyl, quaternary ammonium, and amin e amine.
The electroconductive particle according to claim [[2]] 1, wherein the second functional groups of the graphene coating layer are capable of forming[[:]] covalent bonds with the condensatin-reaetve first functional groups of the polymer microparticle [[;]] or capable of forming ionic bonds with the [[ionic]] firs t functional groups of the polymer microparticle.
The electroconductive particle according to claim 6, wherein the second functional groups tha t can form ionic bonds with the ionic functional g roups are ea c h i ndependently selected from the group consisting of carboxyl, hydroxyl, sulfonyl, quaternary ammonium, and amin o amine.
The electroconductive particle according to claim [[6]] 1, wherein the second functional groups that can form covalent bonds with the condcnsation reactive functional g roup s ara each indcpcndcntly a re selected from the group consisting of carboxyl (-COOH), alkexyearbony4 ester (-COOR '), amin o amine (-NH₂), and thioxy thiol (-SH), wherein R ' being C 1-C1o alkyl, phenyl, or benzyl.
Page 7 of 13 Application Serial No. 12/579,791 PATENT Reply to non-final office action of Docket: CU-9181 9. The electro conductive particle according to claim [[2]] 1, wherein the chemical bonds are covalent bonds or ionic bonds.
The electroconductive particle according to claim 9, wherein the covalent bonds eaeh eemprises comprise an ester bonding (-COO-), amide bonding (-CONH-), or disulfide bonding (-S-S-) moiety.
The electroconductive particle according to claim 9, wherein the ionic bonds are each formed through ionic interactions between-N R₂₃ and-COO -, -O-, or -S3, wherein R₂ being hydrogen, C 1-C₁₀ alkyl, or C 6-C 12 aryl.
A method for preparing an electroconductive particle comprising: providing a polymer microparticle that comprises a plurality of first functional groups attached thereon; introducing to a surface of graphene a plurality of second functional groups; and grafting together the graphene to the polymer microparticle via chemical bond formation between the first and second functional groups in a dispersion medium.
The method of claim 16, wherein providing step comprises: mixing together a dispersing agent, a first monomer, an auxiliary monomer, a crosslinking agent into a solvent to form an initial mixture; adding a polymerization initiator into the initial mixture to form a polymerization mixture; quenching the polymerization mixture to obtain the polymer microparticle; washing the polymer microparticle; isolating the polymer microparticle from the solvent; and lyophilizing the polymer microparticle into a powder form.
The method of claim 16, wherein the introducing step comprises: Page 9 of 13 Application Serial No. 12/579,791 PATENT Reply to non-final office action of Docket: CU-9181 pulverizing graphite; oxidizing the pulverized graphite; and reducing the oxidized pulverized graphite to obtain the graphene.
The method of claim 16, wherein the grafting comprises mixing together the polymer microparticle and the graphene to graph together the graphene to the polymer microparticle via chemical bond formation between the first and second functional groups.
The method of claim 16, wherein the first monomer is selected from the group consisting of styrene, p- hydroxystyrene, p-acetoxystyrene, p-carboxylstyrene, a -methylstyrene, a-chlorostyrene, p-tert-butylstyrene, p-methylstyrene, p-chlorostyrene, o- chlorostyrene, 2,5-dichlorostyrene, 3,4-dich l orostyrene, dimethylstyrene, divinylbenzene, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, butyl acrylate, butyl methacrylate and mixtures thereof; the auxiliary monomer is selected from the group consisting of p- hydroxystyrene, p-acetoxystyrene, p-carboxylstyrene, metacryloxyethyl trimethylammoniumchloride, polyethyleneglycol methylmetacrylate, polyethyleneglycol methylethermetacrylate, polyethyleneglycol methacrylate, polypropylene glycol methacrylate, polypropylene glycol dimethacrylate, and mixtures thereof; Page 10 of 13 Application Serial No. 12/579,791 PATENT Reply to non-final office action of Docket: CU-91 81 the crosslinking agent is selected from the group consisting of divinylbenzene, styrene-based materials, acryl-based materials, and methacryl- based olephilic materials; the polymerization initiator is selected from the group consisting of calcium persulfate, ammonium persulfate, and sodium persulfate, hydrogen peroxide, benzoyl peroxide, lauryl peroxide, azobisisobutyronitril (AIBN) and azobisformamide; the dispensing agent is selected from the group consisting of polyvinylpyrrolidone, polyvinylacetate, and hydroxypropyl-cellulose butyl acrylate; and the solvent is selected from the group consisting of water, dimethylsulfoxide (DMSO), tetrahydrofuran (THF), dimethyformamide (DMF), ethanol, methanol, isopropanol, propanol, butanol, pentanol, hexanol, heptanol, cyclohexanol, benzene, xylene, toluene, cyclohexane.
The method of claim 16, wherein the dispersion of distilled water, isopropanol, ethanol, methanol, cyclohexane, propyleneglycol monomethyletheracetate, methylethylketone. medium is selected from the group consisting butanol, chloroform, diethylether, hexane, cyclotetrahydrofuran, and
Layer stacks claimed or described, ordered top of device to substrate.
electroconductive particle
anisotropic conductive film
Materials described outside the worked examples.
polymer microparticle
graphene coating layer
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
durability, thermal resistance, as well as 25 electroconductivity, which comprises a graphene coating layer having excellent electroconductivity disposed on a polymer microparticle. According to one embodiment of the present invention, there is provided an ele
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Average Particle Size | 0.1–10 um | — |
Weight Ratio Polymer To Graphene | — | — |
Temperature |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 8,178,201Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
An electroconductive particle comprising: (a) a polymer microparticle comprising a plurality of first functional groups, and (b) a graphene coating layer comprising a plurality of second functional groups, the graphene coating la y er grafted on the polymer microparticle vi a chemical bond formation between the first and second functional groups.
The electroconductive particle according to claim 1, wherein the relative weight ratio of the polymer microparticle and the graphene coating layer is 20:80 to 99.9:0.1.
The electroconductive particle according to claim 1, wherein the polymer microparticle is a polystyrene-based, [[polymetacrylate-based]] polymethacrylate-based, or polyacrylate-based polymer microparticle.
The electroconductive particle according to claim 1, wherein the electroconductive particle has an average particle size of 0.1 to 10 pm.
Page 8 of 13 Application Serial No. 12/579,791 PATENT Reply to non-final office action of Docket: CU-9181 15. An anisotropic conductive film comprising the electroconductive particle according to claim 1.
2.
The electroconductive particle according to claim [[2]] 1, wherein the first functional groups are those capable of undergoing a condensation reaction or an ionic fun c tiona l groups coupling interaction.
The electroconductive particle according to claim [[3]] 1, wherein the oenfirst functional groups are selected from the group consisting of carboxyl (-COOH), hydroxyl (-OH), alkoxyearbony4 ester (-COOR '), amin o amine (-NH₂), and thiexy thiol (-SH), wherein R ' being C 1-C₁₀ alkyl, phenyl, or benzyl.
Page 6 of 13 Application Serial No. 12/579,791 PATENT Reply to non-final office action of Docket: CU-91 81 5. The electroconductive particle according to claim [[3]] 1, wherein the [[ionic]] first functional groups are ea ch ndepndenty selected from the group consisting of carboxyl, hydroxyl, sulfonyl, quaternary ammonium, and amin e amine.
The electroconductive particle according to claim [[2]] 1, wherein the second functional groups of the graphene coating layer are capable of forming[[:]] covalent bonds with the condensatin-reaetve first functional groups of the polymer microparticle [[;]] or capable of forming ionic bonds with the [[ionic]] firs t functional groups of the polymer microparticle.
The electroconductive particle according to claim 6, wherein the second functional groups tha t can form ionic bonds with the ionic functional g roups are ea c h i ndependently selected from the group consisting of carboxyl, hydroxyl, sulfonyl, quaternary ammonium, and amin o amine.
The electroconductive particle according to claim [[6]] 1, wherein the second functional groups that can form covalent bonds with the condcnsation reactive functional g roup s ara each indcpcndcntly a re selected from the group consisting of carboxyl (-COOH), alkexyearbony4 ester (-COOR '), amin o amine (-NH₂), and thioxy thiol (-SH), wherein R ' being C 1-C1o alkyl, phenyl, or benzyl.
Page 7 of 13 Application Serial No. 12/579,791 PATENT Reply to non-final office action of Docket: CU-9181 9. The electro conductive particle according to claim [[2]] 1, wherein the chemical bonds are covalent bonds or ionic bonds.
The electroconductive particle according to claim 9, wherein the covalent bonds eaeh eemprises comprise an ester bonding (-COO-), amide bonding (-CONH-), or disulfide bonding (-S-S-) moiety.
The electroconductive particle according to claim 9, wherein the ionic bonds are each formed through ionic interactions between-N R₂₃ and-COO -, -O-, or -S3, wherein R₂ being hydrogen, C 1-C₁₀ alkyl, or C 6-C 12 aryl.
A method for preparing an electroconductive particle comprising: providing a polymer microparticle that comprises a plurality of first functional groups attached thereon; introducing to a surface of graphene a plurality of second functional groups; and grafting together the graphene to the polymer microparticle via chemical bond formation between the first and second functional groups in a dispersion medium.
The method of claim 16, wherein providing step comprises: mixing together a dispersing agent, a first monomer, an auxiliary monomer, a crosslinking agent into a solvent to form an initial mixture; adding a polymerization initiator into the initial mixture to form a polymerization mixture; quenching the polymerization mixture to obtain the polymer microparticle; washing the polymer microparticle; isolating the polymer microparticle from the solvent; and lyophilizing the polymer microparticle into a powder form.
The method of claim 16, wherein the introducing step comprises: Page 9 of 13 Application Serial No. 12/579,791 PATENT Reply to non-final office action of Docket: CU-9181 pulverizing graphite; oxidizing the pulverized graphite; and reducing the oxidized pulverized graphite to obtain the graphene.
The method of claim 16, wherein the grafting comprises mixing together the polymer microparticle and the graphene to graph together the graphene to the polymer microparticle via chemical bond formation between the first and second functional groups.
The method of claim 16, wherein the first monomer is selected from the group consisting of styrene, p- hydroxystyrene, p-acetoxystyrene, p-carboxylstyrene, a -methylstyrene, a-chlorostyrene, p-tert-butylstyrene, p-methylstyrene, p-chlorostyrene, o- chlorostyrene, 2,5-dichlorostyrene, 3,4-dich l orostyrene, dimethylstyrene, divinylbenzene, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, butyl acrylate, butyl methacrylate and mixtures thereof; the auxiliary monomer is selected from the group consisting of p- hydroxystyrene, p-acetoxystyrene, p-carboxylstyrene, metacryloxyethyl trimethylammoniumchloride, polyethyleneglycol methylmetacrylate, polyethyleneglycol methylethermetacrylate, polyethyleneglycol methacrylate, polypropylene glycol methacrylate, polypropylene glycol dimethacrylate, and mixtures thereof; Page 10 of 13 Application Serial No. 12/579,791 PATENT Reply to non-final office action of Docket: CU-91 81 the crosslinking agent is selected from the group consisting of divinylbenzene, styrene-based materials, acryl-based materials, and methacryl- based olephilic materials; the polymerization initiator is selected from the group consisting of calcium persulfate, ammonium persulfate, and sodium persulfate, hydrogen peroxide, benzoyl peroxide, lauryl peroxide, azobisisobutyronitril (AIBN) and azobisformamide; the dispensing agent is selected from the group consisting of polyvinylpyrrolidone, polyvinylacetate, and hydroxypropyl-cellulose butyl acrylate; and the solvent is selected from the group consisting of water, dimethylsulfoxide (DMSO), tetrahydrofuran (THF), dimethyformamide (DMF), ethanol, methanol, isopropanol, propanol, butanol, pentanol, hexanol, heptanol, cyclohexanol, benzene, xylene, toluene, cyclohexane.
The method of claim 16, wherein the dispersion of distilled water, isopropanol, ethanol, methanol, cyclohexane, propyleneglycol monomethyletheracetate, methylethylketone. medium is selected from the group consisting butanol, chloroform, diethylether, hexane, cyclotetrahydrofuran, and
Layer stacks claimed or described, ordered top of device to substrate.
electroconductive particle
anisotropic conductive film
Materials described outside the worked examples.
polymer microparticle
graphene coating layer
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
durability, thermal resistance, as well as 25 electroconductivity, which comprises a graphene coating layer having excellent electroconductivity disposed on a polymer microparticle. According to one embodiment of the present invention, there is provided an ele
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Average Particle Size | 0.1–10 um | — |
Weight Ratio Polymer To Graphene | — | — |
Temperature |
Related documents with shared materials, methods, properties, or citations.
graphite
| 50–70 °C |
| — |
Duration | 12–24 hours | — |
graphite
| 50–70 °C |
| — |
Duration | 12–24 hours | — |
graphite
| 50–70 °C |
| — |
Duration | 12–24 hours | — |
graphite
| 50–70 °C |
| — |
Duration | 12–24 hours | — |