US 12,226,950 B2
Method of 3D printing a cellular solid
Claas Willem Visser, Enschede (NL); Dahlia Ningrum Amato, Troy, NY (US); Jennifer A. Lewis, Cambridge, MA (US); and Jochen Mueller, Somerville, MA (US)
Assigned to UNIVERSITEIT TWENTE, Enschede (NL)
Filed by UNIVERSITEIT TWENTE, Enschede (NL)
Filed on May 10, 2023, as Appl. No. 18/315,266.
Application 18/315,266 is a continuation of application No. 17/265,396, granted, now 11,685,108, previously published as PCT/US2019/044792, filed on Aug. 2, 2019.
Claims priority of provisional application 62/714,892, filed on Aug. 6, 2018.
Prior Publication US 2023/0278278 A1, Sep. 7, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B29C 64/112 (2017.01); B29C 64/188 (2017.01); B29C 64/209 (2017.01); B29C 64/236 (2017.01); B29C 64/245 (2017.01); B33Y 10/00 (2015.01); B33Y 40/20 (2020.01); B33Y 70/00 (2020.01); B29K 105/00 (2006.01); B29K 105/04 (2006.01); B29K 105/16 (2006.01)
CPC B29C 64/112 (2017.08) [B29C 64/188 (2017.08); B29C 64/209 (2017.08); B29C 64/236 (2017.08); B29C 64/245 (2017.08); B33Y 10/00 (2014.12); B33Y 40/20 (2020.01); B33Y 70/00 (2014.12); B29K 2105/0002 (2013.01); B29K 2105/045 (2013.01); B29K 2105/162 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A method of printing a cellular solid on a substrate, the method comprising:
introducing an ink formulation and a gas into a nozzle comprising a core flow channel radially surrounded by an outer flow channel, the ink formulation being directed into the outer flow channel and the gas being directed into the core flow channel;
ejecting the ink formulation and the gas out of the nozzle as a stream of bubbles, each bubble including a core comprising the gas and a liquid shell overlying the core and comprising the ink formulation;
after ejection, solidifying the liquid shell to form a solid shell within one second after deposition of the bubbles on the substrate; and
moving the substrate and the nozzle relative to one another according to a predetermined geometry, thereby printing a solid three-dimensional cellular structure having said predetermined geometry.