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Laser-Induced Microstructuring of Polymers in Gaseous, Liquid and Supercritical Media

New results are presented for laser formation—in particular, the “drawing” of microstructures in polymer films using continuous-wave (CW) laser radiation λ = 405 nm with an intensity of 0.8–3.7 kW/cm(2). The laser drawing was carried out in the polymer system poly-2,2′-p-oxydiphenylene-5,5′-bis-benz...

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Autores principales: Rybaltovskii, Alexey, Minaev, Nikita, Tsypina, Svetlana, Minaeva, Svetlana, Yusupov, Vladimir
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8537447/
https://www.ncbi.nlm.nih.gov/pubmed/34685284
http://dx.doi.org/10.3390/polym13203525
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author Rybaltovskii, Alexey
Minaev, Nikita
Tsypina, Svetlana
Minaeva, Svetlana
Yusupov, Vladimir
author_facet Rybaltovskii, Alexey
Minaev, Nikita
Tsypina, Svetlana
Minaeva, Svetlana
Yusupov, Vladimir
author_sort Rybaltovskii, Alexey
collection PubMed
description New results are presented for laser formation—in particular, the “drawing” of microstructures in polymer films using continuous-wave (CW) laser radiation λ = 405 nm with an intensity of 0.8–3.7 kW/cm(2). The laser drawing was carried out in the polymer system poly-2,2′-p-oxydiphenylene-5,5′-bis-benzimidazole (OPBI), which consists of two phases: a solid polymer matrix with formic acid (HCOOH) dissolved in it. The formation of microstructures, including the stage of foaming, was carried out in three media: air, water and a supercritical carbon dioxide medium containing dissolved molecules of the silver precursor Ag(hfac)COD. The morphological features of foam-like track structures formed in the near-surface layer of the polymer films by laser “drawing” are considered. A model of processes is presented that explains the appearance of periodic structures. The key point of this model is that it considers the participation of the photoinduced mechanism of explosive boiling of formic acid molecules dissolved in the polymer matrix. Using Raman spectroscopy, spectra were obtained and interpreted, which relate to different stages in the formation of microstructures in OPBI films. The effects associated with the peculiarities of luminescent microstructures on the surfaces of glasses in close contact with polymer films during laser “painting” in the air have been studied.
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spelling pubmed-85374472021-10-24 Laser-Induced Microstructuring of Polymers in Gaseous, Liquid and Supercritical Media Rybaltovskii, Alexey Minaev, Nikita Tsypina, Svetlana Minaeva, Svetlana Yusupov, Vladimir Polymers (Basel) Article New results are presented for laser formation—in particular, the “drawing” of microstructures in polymer films using continuous-wave (CW) laser radiation λ = 405 nm with an intensity of 0.8–3.7 kW/cm(2). The laser drawing was carried out in the polymer system poly-2,2′-p-oxydiphenylene-5,5′-bis-benzimidazole (OPBI), which consists of two phases: a solid polymer matrix with formic acid (HCOOH) dissolved in it. The formation of microstructures, including the stage of foaming, was carried out in three media: air, water and a supercritical carbon dioxide medium containing dissolved molecules of the silver precursor Ag(hfac)COD. The morphological features of foam-like track structures formed in the near-surface layer of the polymer films by laser “drawing” are considered. A model of processes is presented that explains the appearance of periodic structures. The key point of this model is that it considers the participation of the photoinduced mechanism of explosive boiling of formic acid molecules dissolved in the polymer matrix. Using Raman spectroscopy, spectra were obtained and interpreted, which relate to different stages in the formation of microstructures in OPBI films. The effects associated with the peculiarities of luminescent microstructures on the surfaces of glasses in close contact with polymer films during laser “painting” in the air have been studied. MDPI 2021-10-13 /pmc/articles/PMC8537447/ /pubmed/34685284 http://dx.doi.org/10.3390/polym13203525 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Rybaltovskii, Alexey
Minaev, Nikita
Tsypina, Svetlana
Minaeva, Svetlana
Yusupov, Vladimir
Laser-Induced Microstructuring of Polymers in Gaseous, Liquid and Supercritical Media
title Laser-Induced Microstructuring of Polymers in Gaseous, Liquid and Supercritical Media
title_full Laser-Induced Microstructuring of Polymers in Gaseous, Liquid and Supercritical Media
title_fullStr Laser-Induced Microstructuring of Polymers in Gaseous, Liquid and Supercritical Media
title_full_unstemmed Laser-Induced Microstructuring of Polymers in Gaseous, Liquid and Supercritical Media
title_short Laser-Induced Microstructuring of Polymers in Gaseous, Liquid and Supercritical Media
title_sort laser-induced microstructuring of polymers in gaseous, liquid and supercritical media
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8537447/
https://www.ncbi.nlm.nih.gov/pubmed/34685284
http://dx.doi.org/10.3390/polym13203525
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