Additive Manufacturing by Heating at a Patterned Photothermal Interface

Chang-Uk Lee; Kyle C H Chin; Andrew J Boydston

doi:10.1021/acsami.3c00365

Additive Manufacturing by Heating at a Patterned Photothermal Interface

ACS Appl Mater Interfaces. 2023 Mar 29;15(12):16072-16078. doi: 10.1021/acsami.3c00365. Epub 2023 Mar 20.

Authors

Chang-Uk Lee¹, Kyle C H Chin², Andrew J Boydston^{1

2

3}

Affiliations

¹ Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, United States.
² Department of Chemical and Biological Engineering, University of Wisconsin, Madison, Wisconsin 53706, United States.
³ Department of Materials Science and Engineering, University of Wisconsin, Madison, Wisconsin 53706, United States.

PMID: 36939689
DOI: 10.1021/acsami.3c00365

Abstract

Direct additive manufacturing (AM) of commercial silicones is an unmet need with high demand. We report a new technology, heating at a patterned photothermal interface (HAPPI), which achieves AM of commercial thermoset resins without any chemical modifications. HAPPI integrates desirable aspects of stereolithography with the thermally driven chemical modalities of commercial silicone formulations. In this way, HAPPI combines the geometric advantages of vat photopolymerization with the materials properties of, for example, injection molded silicones. We describe the realization of the new technology, HAPPI printing using a commercial Sylgard 184 polydimethylsiloxane resin, comparative analyses of material properties, and demonstration of HAPPI in targeted applications.

Keywords: 3D printing; additive manufacturing; photothermal printing; silicones; thermoset resins.