(384d) Two-Color Photoinitiation / Photoinhibition for Continuous Stereolithographic Additive Manufacturing | AIChE

(384d) Two-Color Photoinitiation / Photoinhibition for Continuous Stereolithographic Additive Manufacturing

Authors 

de Beer, M. - Presenter, University of Michigan
Pritchard, Z. D., University of Michigan
Scott, T. F., University of Michigan
Burns, M. A., University of Michigan
Continuous stereolithographic additive manufacturing allows high print speed and eliminate directionally-dependent material properties present in traditional layer-by-layer approaches. Current approaches allow continuous printing by eliminating adhesion to the print window during printing (which necessitates separation and recoating steps) by inhibiting polymerization in a thin region, or "dead zone", using oxygen inhibition.

Another method to enable continuous 3D printing is to use a two-color polymerization system where one wavelength initiates polymerization and a secondary orthogonal wavelength inhibits polymerization. This approach enables increased control over the dead zone and allows additional functionality over what is possible with the conventional oxygen-inhibited.

The theoretical and practical aspects of this approach are presented along with the promise and challenges of this novel continuous additive manufacturing approach.

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