Journal
ADVANCED MATERIALS
Volume 30, Issue 31, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201800364
Keywords
3D printing; photochemistry; photochromism
Categories
Funding
- Institute for Collaborative Biotechnologies through U.S. Army Research Office [W911NF-09-0001]
- National Science Foundation (MRSEC program) [DMR 1720256]
- California NanoSystems Institute, University of California, Santa Barbara
- UC-LEADS program
- McNair Scholars program
- Fonds der Chemischen Industrie
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A novel methodology for printing 3D objects with spatially resolved mechanical and chemical properties is reported. Photochromic molecules are used to control polymerization through coherent bleaching fronts, providing large depths of cure and rapid build rates without the need for moving parts. The coupling of these photoswitches with resin mixtures containing orthogonal photo-crosslinking systems allows simultaneous and selective curing of multiple networks, providing access to 3D objects with chemically and mechanically distinct domains. The power of this approach is showcased through the one-step fabrication of bioinspired soft joints and mechanically reinforced brick-and-mortar structures.
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