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Type II Photoinitiator and Tuneable Poly(Ethylene Glycol)-Based Materials Library for Visible Light Photolithography

TitleType II Photoinitiator and Tuneable Poly(Ethylene Glycol)-Based Materials Library for Visible Light Photolithography
Publication TypeJournal Article
Year of Publication2020
AuthorsX. Yang, M. Mohseni, O. Bas, C. Meinert, E. J. New, and N. J. Castro
JournalTissue Eng. Part A
Date PublishedMAR 17
Type of ArticleArticle; Early Access
ISSN1937-3341
Keywordsbioink, multimaterial scaffold, photocrosslinkable hydrogel, poly(ethylene glycol) diacrylate (PEG-DA), stereolithography, visible light type II photoinitiator
Abstract

Stereolithography (SL) has several advantages over traditional biomanufacturing techniques such as fused deposition modeling, including increased speed, accuracy, and efficiency. While SL has been broadly used in tissue engineering for the fabrication of three-dimensional scaffolds that can mimic the in vivo environment for cell growth and tissue regeneration, lithographic printing is usually performed on single-component materials cured with ultraviolet light, severely limiting the versatility and cytocompatibility of such systems. In this study, we report a highly tunable, low-cost photoinitiator system that we used to establish a systematic library of crosslinked materials based on low molecular weight poly(ethylene glycol) diacrylate. We assessed the physicochemical properties, photocrosslinking efficiency, cost performance, and biocompatibility to demonstrate the capability of manufacturing a multimaterial complex tissue scaffold.

DOI10.1089/ten.tea.2019.0282