Artículo
Fast visible-light photopolymerization in the presence of multiwalled carbon nanotubes: Toward 3D printing conducting nanocomposites
Gallastegui, Antonela
; Dominguez Alfaro, Antonio; Lezama, Luis; Alegret, Nuria; Prato, Maurizio; Gomez, María Lorena
; Mecerreyes, David
Fecha de publicación:
03/2022
Editorial:
American Chemical Society
Revista:
ACS Macro Letters
ISSN:
2161-1653
e-ISSN:
2161-1653
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
A new photoinitiator system (PIS) based on riboflavin (Rf), triethanolamine, and multiwalled carbon nanobutes (MWCNTs) is presented for visible-light-induced photopolymerization of acrylic monomers. Using this PIS, photopolymerization of acrylamide and other acrylic monomers was quantitative in seconds. The intervention mechanism of CNTs in the PIS was studied deeply, proposing a surface interaction of MWCNTs with Rf which favors the radical generation and the initiation step. As a result, polyacrylamide/MWCNT hydrogel nanocomposites could be obtained with varying amounts of CNTs showing excellent mechanical, thermal, and electrical properties. The presence of the MWCNTs negatively influences the swelling properties of the hydrogel but significantly improves its mechanical properties (Young modulus values) and electric conductivity. The new PIS was tested for 3D printing in a LCD 3D printer. Due to the fast polymerizations, 3D-printed objects based on the conductive polyacrylamide/CNT nanocomposites could be manufactured in minutes.
Palabras clave:
3D PRINTING
,
PHOTOPOLYMERIZATION
,
PHOTOINITIATOR
,
MULTIWALL ACRBON NANOTUBES
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Identificadores
Colecciones
Articulos (IITEMA)
Articulos de INSTITUTO DE INVESTIGACIONES EN TECNOLOGIAS ENERGETICAS Y MATERIALES AVANZADOS
Articulos de INSTITUTO DE INVESTIGACIONES EN TECNOLOGIAS ENERGETICAS Y MATERIALES AVANZADOS
Citación
Gallastegui, Antonela; Dominguez Alfaro, Antonio; Lezama, Luis; Alegret, Nuria; Prato, Maurizio; et al.; Fast visible-light photopolymerization in the presence of multiwalled carbon nanotubes: Toward 3D printing conducting nanocomposites; American Chemical Society; ACS Macro Letters; 11; 3; 3-2022; 303-309
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