ChemRxiv
These are preliminary reports that have not been peer-reviewed. They should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information. For more information, please see our FAQs.
1/1
2 files

Additives for Ambient 3D Printing with Visible Light

preprint
submitted on 09.04.2021, 00:51 and posted on 09.04.2021, 09:40 by Dowon Ahn, Lynn Stevens, Kevin Zhou, Zachariah Page
With 3D printing we desire to be “limited only by our imagination”, and although remarkable advancements have been made in recent years the scope of printable materials remains narrow compared to other forms of manufacturing. Light-driven polymerization methods for 3D printing are particularly attractive due to unparalleled speed and resolution, yet the reliance on high energy UV/violet light in contemporary processes limits the number of compatible materials due to pervasive absorption, scattering, and degradation at these short wavelengths. Such issues can be addressed with visible light photopolymerizations. However, these lower-energy methods often suffer from slow reaction times and sensitivity to oxygen, precluding their utility in 3D printing processes that require rapid hardening (curing) to maximize build speed and resolution. Herein, multifunctional thiols are identified as simple additives to enable rapid high resolution visible light 3D printing under ambient (atmospheric O2) conditions that rival modern UV/violet-based technology. The present process is universal, providing access to commercially relevant acrylic resins with a range of disparate mechanical responses from strong and stiff to soft and extensible. Pushing forward, the insight presented within this study will inform the development of next generation 3D printing materials, such as multicomponent hydrogels and composites.

Funding

Welch Foundation (Grant # F-2007)

Center for Dynamics and Control of Materials

Directorate for Mathematical & Physical Sciences

Find out more...

History

Email Address of Submitting Author

zpage@utexas.edu

Institution

The University of Texas at Austin

Country

United States

ORCID For Submitting Author

0000-0002-1013-5422

Declaration of Conflict of Interest

no conflict of interest

Exports