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Polymers, volume 16, issue 6, pages 855

Isobornyl and Isocamphyl Photostabilizers in Poly(lactic acid)-Based Electrospun Fibers

V A Belyi 1
Ivan M. Kuzivanov 1
Irina Fedorova 1
Olga A. Shumova 1
Nikita Paderin 2
Pavel Markov 3
Irina Yu Chukicheva 1
Alexander V Kutchin 1
Show full list: 9 authors
Publication typeJournal Article
Publication date2024-03-20
Journal: Polymers
scimago Q1
SJR0.800
CiteScore8.0
Impact factor4.7
ISSN20734360
General Chemistry
Polymers and Plastics
Abstract

In this work, electrospun polylactide fibers with new photostabilizing additives, 4-methyl-2,6-diisobornylphenol (DIBP) and N-isocamphylaniline (NICA), have been tested under the influence of UV-C radiation (254 nm). The changes in the polymers’ chemical structure under UV-C radiation were revealed through the increase in absorption in the 3600–3100 cm−1 region in regard to the FTIR spectra. In the samples that were irradiated for 1 h, the stabilizing effect of the photoprotectors became most noticeable as the difference in the content of the hydroxyl groups in stabilized and the pure PLA reached a maximum. The TG–DSC method revealed that the most sensitive indicator of the irradiation effect was the glass transition temperature (Tg), which persisted after 2 h of irradiation when using photostabilizers and their combinations. The PLA/DIBP(1) and PLA/NICA(1) samples showed the best results in protecting PLA from UV-C radiation based on the Tg values; although, the mixture of DIBP and NICA was not as effective. The chemical structure of the photostabilized PLA samples was studied using NMR, GPC, and Py–GC/MS analysis. The electrospun polylactide fibers were mechanically tested and the effects of the electrospun samples on cell viability were studied.

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