Open Access Repository

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

Li, F ORCID: 0000-0002-8088-1981, Thickett, SC ORCID: 0000-0002-8168-3856, Maya, F ORCID: 0000-0003-1458-736X, Doeven, EH, Guijt, RM ORCID: 0000-0003-0011-5708 and Breadmore, MC ORCID: 0000-0001-5591-4326 2020 , 'Rapid additive manufacturing of 3D geometric structures via dual-wavelength polymerization' , ACS Macro Letters, vol. 9, no. 10 , pp. 1409-1414 , doi: 10.1021/acsmacrolett.0c00465.

Full text not available from this repository.

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 Type: Article
Authors/Creators:Li, F and Thickett, SC and Maya, F and Doeven, EH and Guijt, RM and Breadmore, MC
Keywords: analytical chemistry
Journal or Publication Title: ACS Macro Letters
Publisher: American Chemical Society
ISSN: 2161-1653
DOI / ID Number: 10.1021/acsmacrolett.0c00465
Copyright Information:

Copyright 2020 American Chemical Society

Related URLs:
Item Statistics: View statistics for this item

Actions (login required)

Item Control Page Item Control Page
TOP