阅读说明：本技术 打印方法和系统 (Printing method and system ) 是由 A·戈雷德玛 C·史密森 B·E·亚伯拉罕 M·N·克雷蒂安 N·乔普拉 K·I·哈弗雅德 于 2019-06-26 设计创作，主要内容包括：本文公开了一种用于形成三维制品的打印方法和系统。所述方法包含：沉积UV可固化组合物；以及施加UV辐射以固化所述UV可固化组合物从而形成3D结构。所述方法包含：将导电金属油墨组合物沉积在所述3D结构的表面上；以及使所述导电金属油墨组合物在低于所述UV可固化组合物的玻璃转变温度的温度下退火以在所述3D结构上形成导电迹线。所述方法包含：将第二可固化组合物沉积在所述导电迹线上方；以及固化第二可固化组合物以形成具有嵌入其中的所述导电迹线的所述3D印刷制品。(A printing method and system for forming a three-dimensional article is disclosed herein. The method comprises the following steps: depositing a UV curable composition; and applying UV radiation to cure the UV curable composition to form the 3D structure. The method comprises the following steps: depositing a conductive metal ink composition on a surface of the 3D structure; and annealing the conductive metal ink composition at a temperature below the glass transition temperature of the UV curable composition to form a conductive trace on the 3D structure. The method comprises the following steps: depositing a second curable composition over the conductive trace; and curing the second curable composition to form the 3D printed article having the conductive traces embedded therein.)

1. A method for forming a three-dimensional (3D) printed article, the method comprising:

depositing a UV curable composition;

applying UV radiation to cure the UV curable composition to form a 3D structure;

depositing a conductive metal ink composition on a surface of the 3D structure;

annealing the conductive metal ink composition at a temperature below the glass transition temperature of the UV curable composition to form conductive traces on the 3D structure;

depositing a second UV curable composition over the conductive trace; and

curing the second UV curable composition to form the 3D printed article having the conductive traces embedded therein.

2. The method of claim 1, wherein the UV curable composition comprises: at least one monofunctional acrylate; optionally an oligomer selected from the group consisting of: difunctional acrylate oligomers, multifunctional acrylate oligomers, and mixtures thereof; and a photoinitiator.

3. The method of claim 1, wherein the second curable composition comprises: at least one monofunctional acrylate oligomer; an oligomer selected from the group consisting of: difunctional acrylate oligomers, multifunctional acrylate oligomers, and mixtures thereof; and a photoinitiator.

4. The method of claim 1, wherein the conductive metal ink composition is annealed at a temperature less than 120 ℃.

5. The method of claim 1, wherein the conductive metal ink composition comprises:

at least one aromatic hydrocarbon solvent; at least one aliphatic hydrocarbon solvent; and

a plurality of metal nanoparticles.

6. The method of claim 5, wherein the aromatic hydrocarbon solvent is selected from the group consisting of: phenylcyclohexane, toluene, trimethylbenzene, meta-xylene, ethylbenzene, and combinations thereof.

7. The method of claim 5, wherein the aliphatic hydrocarbon solvent is selected from the group consisting of: ethylcyclohexane, methylcyclohexane, terpineol, bicyclohexane, decalin, cyclohexane, and combinations thereof.

8. The method of claim 5, wherein the plurality of metal nanoparticles are selected from the group consisting of: al, Ag, Au, Pt, Pd, Cu, Co, Cr, In and Ni.

9. The method of claim 5, wherein the conductive ink composition comprises organic stabilizing groups attached to the plurality of metal nanoparticles.

10. The method of claim 1, further comprising: depositing a thermally cured overcoat layer over the annealed conductive traces prior to depositing the second UV curable composition.

11. A printing system, comprising:

a first three-dimensional (3D) printer for depositing a UV curable composition;

a first UV curing apparatus for curing the UV curable composition to form a 3D structure;

a printer for depositing a conductive metal ink composition on a surface of the 3D structure;

a heater for drying and annealing the conductive metal ink composition at a temperature below a glass transition temperature of the UV curable composition to form conductive traces on the cured UV curable composition of the 3D structure;

a second 3D printer for depositing a second UV curable composition over the conductive traces; and

a second UV curing apparatus for curing the second UV curable composition deposited over the conductive traces to form a 3D printed article having conductive traces embedded therein.

12. The system of claim 11, wherein the first 3D printer, the printer for depositing the conductive ink, and the second 3D printer comprise a single printer having a plurality of printheads.

13. The system of claim 11, wherein the second curing device is a heater.

14. The system of claim 11, wherein the second curing apparatus is a UV curing apparatus.

15. The system of claim 14, wherein the first UV curing apparatus and the second curing apparatus comprise one apparatus.

16. A method of printing, comprising:

depositing a conductive metal ink composition on a surface of a three-dimensional (3D) structure having a glass transition temperature; and

annealing the conductive metal ink composition at a temperature below the glass transition temperature to form a conductive surface on the 3D structure;

depositing a second UV curable composition over the conductive surface; and

curing the second UV curable composition to form a 3D printed article having the conductive surface embedded therein.

17. The method of claim 16, wherein the conductive metal ink composition is annealed at a temperature less than 120 ℃.

18. The method of claim 16, wherein the second curable composition is cured by thermal curing.

19. The method of claim 16, wherein the second curable composition is cured by UV radiation curing.

20. The method of claim 16, wherein the 3D structure comprises: at least one monofunctional acrylate; optionally an oligomer selected from the group consisting of: difunctional acrylate oligomers, multifunctional acrylate oligomers, and mixtures thereof; and a photoinitiator.