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Rapid additive manufacturing of 3D geometric structures via dual-wavelength polymerization

Citation

Li, F and Thickett, SC and Maya, F and Doeven, EH and Guijt, RM and Breadmore, MC, Rapid additive manufacturing of 3D geometric structures via dual-wavelength polymerization, ACS Macro Letters, 9, (10) pp. 1409-1414. ISSN 2161-1653 (2020) [Refereed Article]

Copyright Statement

Copyright 2020 American Chemical Society

DOI: doi:10.1021/acsmacrolett.0c00465

Abstract

A dual-wavelength photopolymerization process is presented, allowing for the volumetric fabrication of complex geometries using a multistep process. The methacrylate-based resin contained 0.1 wt % camphorquinone/0.1 wt % ethyl 4-(dimethylamino) benzoate and 0.2 wt % bis[2-(ochlorophenyl)-4,5-diphenylimidazole] as photoinitiator (473 nm) and photoinhibitor (365 nm), respectively. The photoinitiator and photoinhibitor concentrations were optimized to allow for photocuring to full depth (4.6 mm) following an exposure time of 2 min solely by 473 nm light, but no curing occurred when 365 nm light was present due to photoinhibition. This resin was validated using one-step volumetric fabrication of two objects containing voids defined by the 365 nm irradiation region. Two more complex structures were printed in a step-by-step manner, relying on the dynamic control of the projection patterns of both 365 and 473 nm projectors, decreasing the print time from 20 min using a commercially available single wavelength resin printer to 2 min.

Item Details

Item Type:Refereed Article
Keywords:analytical chemistry
Research Division:Engineering
Research Group:Materials engineering
Research Field:Polymers and plastics
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Li, F (Mr Feng Li)
UTAS Author:Thickett, SC (Associate Professor Stuart Thickett)
UTAS Author:Maya, F (Mr Fernando Maya Alejandro)
UTAS Author:Guijt, RM (Dr Rosanne Guijt)
UTAS Author:Breadmore, MC (Professor Michael Breadmore)
ID Code:143974
Year Published:2020
Funding Support:Australian Research Council (LP160101247)
Web of Science® Times Cited:6
Deposited By:Chemistry
Deposited On:2021-04-13
Last Modified:2022-01-06
Downloads:0

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