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US 12,214,546 B2Granted
Rapid, large volume, dead layer-free 3D printing
AssigneeNorthwestern University
InventorsDavid A. Walker, James L. Hedrick, III, Chad A. Mirkin
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Abstract
Methods and apparatus comprising a dewetting material and a polymerization liquid that are immiscible and dewetting, and can be used for the formation of three-dimensional objects, wherein the method does not require a dead zone. Additionally, methods and apparatus that employ the use of a flowing dewetting material to provide a shearing interface to reduce interfacial adhesive forces.
Claims18
A method of forming a three-dimensional object using an apparatus having a movable adhesion stage separate from a member, the method comprising:
- flowing a dewetting material across the member, the dewetting material having a build surface;
- providing a polymerization liquid on the dewetting material, wherein the polymerization liquid is immiscible with the dewetting material such that an interface is defined between the polymerization liquid and the dewetting material and a build region is defined between the interface and the adhesion stage;
- and
- exposing the polymerization liquid in the build region to a pattern of energy through at least a portion of the member and the dewetting material to polymerize the polymerization liquid and form a green polymer;
- and advancing the adhesion stage away from the build surface to form the three-dimensional object comprised of the green polymer,
- wherein
- the dewetting material is flowed across the member and is recirculated under conditions sufficient to dissipate heat and maintain a slip boundary between the green polymer and the dewetting material.
4 more elements
Dependencies are inferred from the claim text.