	US 12,305,024 B2
	Conductive composite resin composition for photocurable three-dimensional printing, preparation method thereof and photocurable three-dimensional printed material using the same
Sang Woo Kim, Seoul (KR); Sanghye Kim, Seoul (KR); and Heejung Lee, Seoul (KR)
Assigned to Korea Institute of Science and Technology, Seoul (KR)
Filed by KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY, Seoul (KR)
Filed on Mar. 16, 2021, as Appl. No. 17/203,338.
Claims priority of application No. 10-2020-0033081 (KR), filed on Mar. 18, 2020; and application No. 10-2021-0031858 (KR), filed on Mar. 11, 2021.
Prior Publication US 2021/0292565 A1, Sep. 23, 2021
Int. Cl. B33Y 70/10 (2020.01); B33Y 10/00 (2015.01); B33Y 70/00 (2020.01); C08K 3/04 (2006.01); C08K 3/08 (2006.01); C08K 5/09 (2006.01); C08K 7/06 (2006.01); C08K 9/04 (2006.01); C08L 101/12 (2006.01); B22F 1/054 (2022.01); B33Y 80/00 (2015.01); B82Y 30/00 (2011.01); B82Y 40/00 (2011.01)

CPC C08L 101/12 (2013.01) [B33Y 10/00 (2014.12); B33Y 70/00 (2014.12); B33Y 70/10 (2020.01); C08K 3/041 (2017.05); C08K 3/042 (2017.05); C08K 3/046 (2017.05); C08K 3/08 (2013.01); C08K 5/09 (2013.01); C08K 7/06 (2013.01); C08K 9/04 (2013.01); B22F 1/0547 (2022.01); B33Y 80/00 (2014.12); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); C08K 2003/0806 (2013.01); C08K 2201/001 (2013.01); C08K 2201/011 (2013.01); C08L 2203/20 (2013.01)]

10 Claims

1. A conductive composite resin composition for photocurable three-dimensional (3D) printing comprising:

a photoreactive viscosity decreasing agent, a photocurable resin, and conductive nanostructures;

wherein;

the photoreactive viscosity decreasing agent is present in an amount of 10 to 90 wt % of the conductive composite resin composition; the photocurable resin is present in an amount of 10 to 90 wt % of the conductive composite resin composition;

the conductive nanostructures are present in an amount of 0.01 to 1 wt % of the conductive composite resin composition;

the conductive nanostructures are nitrogen-doped carbon nanotubes that comprise at least one type selected from the group consisting of nitrogen-doped single-walled carbon nanotubes (SWCNTs) in which PEDOT:PSS is formed on at least one portion of a surface of said nitrogen-doped SWCNTs, nitrogen-doped double-walled carbon nanotubes (DWCNTs) in which PEDOT:PSS is formed on at least one portion of a surface of said nitrogen-doped DWCNTs, and nitrogen-doped multi-walled carbon nanotubes (MWCNTs) in which PEDOT:PSS is formed on at least one portion of a surface of said nitrogen-doped MWCNTs; and

the conductive composite resin composition has a viscosity of 400 cP or less at a shear rate of 58 s⁻¹after being defoamed at a temperature of 35° C. or below.

8. A photocurable three-dimensional (3D) printed material formed from the conductive composite resin composition according to claim 1.

10. The photocurable 3D printed material of claim 8, wherein the printed material has an increasing electromagnetic wave shielding efficiency as a frequency increases.