Publication detail

Impact of TiO2 nanoparticles on the kinetics of free-radical and cationic photopolymerization in Vat 3D printing

KORČUŠKOVÁ, M. SVATÍK, J. SEVRIUGINA, V. ŠTAFFOVÁ, M. ONDREÁŠ, F. LEPCIO, P.

Original Title

Impact of TiO2 nanoparticles on the kinetics of free-radical and cationic photopolymerization in Vat 3D printing

Type

abstract

Language

English

Original Abstract

Photopolymerization, which is a light-induced reaction, can be distinguished as a free-radical and cationic, based on the photoinitiation mechanism. The commonly used radical resins typically utilize acrylate and methacrylate monomers and oligomers, which react with free radicals upon photoinitiation. On the other hand, cationic resins are usually based on epoxy monomers, where a cation is formed to ring-open the epoxy groups. Photopolymerization reactions are the basis of Vat 3D printing technology, in which the liquid monomer mixture is converted into solid polymer upon the exposure to light. Vat 3D printing can be used not only for preparation of pure polymer samples but also for polymer nanocomposites. In this case, the overall photopolymerization kinetics depends on the monomers used, the processing parameters (wavelength of light, light intensity, and curing time), and the presence of nanoparticles in the monomer mixture. The growing demand for the preparation of nanocomposites using Vat 3D printing technology requires further study of the photopolymerization kinetics. The present nanoparticles interact with the incident light via scattering or absorption. Some of the nanoparticles, e.g., metal oxides, can even exhibit a photoinitiating effect after light irradiation. In addition, the nanoparticles interact chemically with the surrounding photopolymerizable resin, which can also affect the kinetics. This study investigates the photopolymerization kinetics of free-radical and cationic photopolymerizable resins filled with different content of titania (TiO2) nanoparticles in both anatase and rutile form. Photolysis measurements, real-time FTIR, and photo-DSC revealed that photoactive anatase and rutile nanoparticles can accelerate the photopolymerization kinetics, whereas the higher effect was observed via a free-radical photopolymerization mechanism. The results were compared to those of an unfilled matrix to judge the effect caused by the present nanoparticles.

Keywords

Photopolymerization, Vat 3D printing, reaction kinetics, titania nanoparticles

Authors

KORČUŠKOVÁ, M.; SVATÍK, J.; SEVRIUGINA, V.; ŠTAFFOVÁ, M.; ONDREÁŠ, F.; LEPCIO, P.

Released

28. 8. 2022

ISBN

978-86-919111-7-1

Book

Program and Book of Abstracts

Pages from

130

Pages to

130

Pages count

1

URL

https://www.mrs-serbia.org.rs/index.php/book-of-abstracts-2022

BibTex

@misc{BUT179045,
  author="Martina {Korčušková} and Juraj {Svatík} and Veronika {Sevriugina} and Martina {Štaffová} and František {Ondreáš} and Petr {Lepcio}",
  title="Impact of TiO2 nanoparticles on the kinetics of free-radical and cationic photopolymerization in Vat 3D printing",
  booktitle="Program and Book of Abstracts",
  year="2022",
  pages="130--130",
  isbn="978-86-919111-7-1",
  url="https://www.mrs-serbia.org.rs/index.php/book-of-abstracts-2022",
  note="abstract"
}