Paste composition and preparation method therefor

1. A paste composition comprising:

ceramic particles each surface-functionalized with an amine group, and a maleic anhydride-grafted elastomer, wherein the ceramic particles surface-functionalized with the amine group are formed by dispersing ceramic particles in distilled water and adding polyethyleneimine to form ceramic particles surface-functionalized with the amine group prior to combining the ceramic particles surface-functionalized with the amine group with the maleic anhydride-grafted elastomer;

wherein the ceramic particles and the amine group are in a weight ratio of 1:0.5 to 10.

2. The paste composition of claim 1 , wherein the ceramic particles surface-functionalized with the amine group are ceramic particles surface-coated with a polyamine-based compound.

3. The paste composition of claim 2 , wherein the polyamine-based compound is a polyamine-based polymer, a polyamine-based monomer, or a mixture thereof, which contains two or more amine groups.

4. The paste composition of claim 3 , wherein the polyamine-based polymer is any one or two or more selected from the group consisting of polyalkyleneimine, polyvinylamine, polyamidoamine, polyallylamine, and polyetheramine, and the polyamine-based monomer is any one or two or more selected from the group consisting of alkylenediamine, dialkylenetriamine, trialkylenetetramine, p-phenylenediamine, m-phenylenediamine, 2,5-diaminotoluene, 2,6-diaminotoluene, 1,3-bis(4,4′-aminophenoxy)benzene, 4,4′-diamino-1,5-phenoxypentane, 4,4′-diaminobiphenyl, 3,3′-dimethyl-4,4′-diaminobiphenyl, 3,3′-dimethoxy-4,4′-diaminobiphenyl, 4,4′-diaminodiphenyl ether, 4,4′-diaminodiphenyl methane, 2,2′-diaminodiphenyl propane, bis(3,5-diethyl-4-aminophenyl) methane, diaminodiphenylsulfone, diaminobenzophenone, diaminonaphthalene, 1,4-bis(4-aminophenoxy)benzene, 1,4-bis(4-aminophenyl)benzene, 9,10-bis(4-aminophenyl)anthracene, 1,3-bis(4-aminophenoxy)benzene, 4,4′-bis(4-aminophenoxy)diphenyl sulfone, 2,2-bis[4-(4-aminophenoxy)phenyl]propane, 2,2′-trifluoromethyl-4,4′-diaminobiphenyl, 1,4-diaminocyclohexane, 1,2-diaminocyclohexane, 1,4-cyclohexane-bis(methylamine), and 4,4′-diaminodicyclohexylmethane.

5. The paste composition of claim 1 , wherein the ceramic particles are any one or two or more selected from the group consisting of lead zirconate titanate (PZT), barium titanate, zinc oxide, potassium nitride, aluminum nitride, bismuth iron oxide, and silicon carbide.

6. The paste composition of claim 1 , wherein the maleic anhydride-grafted elastomer is any one or two or more selected from the group consisting of a polystyrene-based block copolymer-graft-maleic anhydride block copolymer, a polyolefin-based-graft-maleic anhydride elastomer, a polyamide-based-graft-maleic anhydride elastomer, and a polyester-based-graft-maleic anhydride elastomer.

7. The paste composition of claim 1 , further comprising:

any one or two or more second elastomers selected from the group consisting of a styrene-butylene-styrene (SBS)-based block copolymer, a styrene-isoprene-styrene (SIS)-based block copolymer, a styrene-ethylene-butylene-styrene (SEBS)-based block copolymer, and a styrene-ethylene-propylene-styrene (SEPS)-based block copolymer.

8. The paste composition of claim 1 , wherein the paste composition is an energy harvesting paste composition.

9. A thin film comprising:

ceramic particles each surface-functionalized with an amine group, and a maleic anhydride-grafted elastomer, wherein the ceramic particles surface-functionalized with the amine group and the maleic anhydride-grafted elastomer have a weight ratio of 1:0.01 to 3.

10. A device comprising:

a thin film including negatively charged ceramic particles each surface-functionalized with a positively charged amine group, and a maleic anhydride-grafted elastomer, wherein the ceramic particles are highly dispersed within the maleic anhydride-grafted elastomer;

wherein the ceramic particles and the amine group are in a weight ratio of 1:0.5 to 10.

11. An energy harvesting method in which power energy, pressure energy, or vibration energy is converted into electrical energy through a device including a thin film produced by applying and drying the paste composition of claim 1 into a mold.

12. The energy harvesting method of claim 11 , wherein the ceramic particles surface-functionalized with the amine group are ceramic particles surface-coated with a polyamine-based compound.

13. The energy harvesting method of claim 12 , wherein the polyamine-based compound is a polyamine-based polymer, a polyamine-based monomer, or a mixture thereof, which contains two or more amine groups.

14. The energy harvesting method of claim 13 , wherein the polyamine-based polymer is any one or two or more selected from the group consisting of polyalkyleneimine, polyvinylamine, polyamidoamine, polyallylamine, and polyetheramine, and the polyamine-based monomer is any one or two or more selected from the group consisting of alkylenediamine, dialkylenetriamine, trialkylenetetramine, p-phenylenediamine, m-phenylenediamine, 2,5-diaminotoluene, 2,6-diaminotoluene, 1,3-bis(4,4′-aminophenoxy)benzene, 4,4′-diamino-1,5-phenoxypentane, 4,4′-diaminobiphenyl, 3,3′-dimethyl-4,4′-diaminobiphenyl, 3,3′-dimethoxy-4,4′-diaminobiphenyl, 4,4′-diaminodiphenyl ether, 4,4′-diaminodiphenyl methane, 2,2′-diaminodiphenyl propane, bis(3,5-diethyl-4-aminophenyl)methane, diaminodiphenylsulfone, diaminobenzophenone, diaminonaphthalene, 1,4-bis(4-aminophenoxy)benzene, 1,4-bis(4-aminophenyl)benzene, 9,10-bis(4-aminophenyl)anthracene, 1,3-bis(4-aminophenoxy)benzene, 4,4′-bis(4-aminophenoxy)diphenylsulfone, 2,2-bis[4-(4-aminophenoxy)phenyl]propane, 2,2′-trifluoromethyl-4,4′-diaminobiphenyl, 1,4-diaminocyclohexane, 1,2-diaminocyclohexane, 1,4-cyclohexane-bis(methylamine), and 4,4′-diaminodicyclohexylmethane.

15. The energy harvesting method of claim 11 , wherein the ceramic particles are any one or two or more selected from the group consisting of lead zirconate titanate (PZT), barium titanate, zinc oxide, potassium nitride, aluminum nitride, bismuth iron oxide, and silicon carbide.

16. The energy harvesting method of claim 11 , wherein the maleic anhydride-grafted elastomer is any one or two or more selected from the group consisting of a polystyrene-based block copolymer-graft-maleic anhydride block copolymer, a polyolefin-based-graft-maleic anhydride elastomer, a polyamide-based-graft-maleic anhydride elastomer, and a polyester-based-graft-maleic anhydride elastomer.

17. The energy harvesting method of claim 11 , wherein the paste composition further includes any one or two or more second elastomers selected from the group consisting of a styrene-butylene-styrene (SBS)-based block copolymer, a styrene-isoprene-styrene (SIS)-based block copolymer, a styrene-ethylene-butylene-styrene (SEBS)-based block copolymer, and a styrene-ethylene-propylene-styrene (SEPS)-based block copolymer.

18. The thin film of the device of claim 10 , wherein the ceramic particles surface-functionalized with the amine group and the maleic anhydride-grafted elastomer have a weight ratio of 1:0.01 to 3.