Anatase and rutile nanoparticles in photopolymer 3D-printed nanocomposites: Band gap-controlled electron interactions in free-radical and cationic photocuring

Korčušková, Martina; Svatík, Juraj; Tomal, Wiktoria; Šikyňová, Aneta; Vishakha, Vishakha; Petko, Filip; Galek, Mariusz; Stalmach, Paweł; Ortyl, Joanna; Lepcio, Petr

Anatase and rutile nanoparticles in photopolymer 3D-printed nanocomposites: Band gap-controlled electron interactions in free-radical and cationic photocuring

Date

2024-07-01

Authors

Korčušková, Martina

Svatík, Juraj

Tomal, Wiktoria

Šikyňová, Aneta

Vishakha, Vishakha

Petko, Filip

Galek, Mariusz

Stalmach, Paweł

Ortyl, Joanna

Lepcio, Petr

ORCID

0000-0002-7056-5571

Publisher

Elsevier

Altmetrics

Abstract

The preparation of functional photopolymer nanocomposites is affected by both the physical and chemical interactions of nanoparticles (NPs) and polymer resin. Some NPs, such as semiconducting metal oxides, may contribute by their photocatalytic behavior and electron transfer, influencing the kinetics of the photopolymerization reaction. This study has investigated the complex effect of titanium dioxide (TiO 2 ) NPs in anatase and rutile form on the conversion, kinetics, and printability of free -radical and cationic photopolymerization resin. Two different polymorphs of TiO 2 NPs ensured identical chemical properties, but different physical effects related to their varying band gap energies and electron transfer efficiency. These parameters were found to be crucial for influencing the photopolymerization kinetics. While rutile showed a more pronounced enhancement of the free -radical photopolymerization ' s conversion and kinetics, cationic photopolymerization was favourably affected only by anatase NPs due to the photosensitization effect. These findings are critical in understanding and designing functional nanocomposite materials processed by vat photopolymerization 3D printing that could find use in optical, medical, or environmental applications.

Keywords

Photoinitiation, Titanium dioxide, electron transfer, Cyclic voltammetry, Conversion

Citation

REACTIVE & FUNCTIONAL POLYMERS. 2024, vol. 200, issue 6, p. 1-12.
https://www.sciencedirect.com/science/article/pii/S1381514824000981

Document type

Peer-reviewed

Document version

Published version

Language of document

en

Document licence

Creative Commons Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/