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Design of UV-Resistant Polylactide-Based Coating Systems: Effect of Plasticizers and Fillers on Durability and Degradation Behavior.

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Title: Design of UV-Resistant Polylactide-Based Coating Systems: Effect of Plasticizers and Fillers on Durability and Degradation Behavior.
Authors: Myronyuk, Oleksiy1 (AUTHOR), Baklan, Denys1,2 (AUTHOR) m.domashevskyy@knute.edu.ua, Domashevskyi, Myroslav2,3 (AUTHOR), Karavayev, Taras1,2 (AUTHOR), Sevastyanova, Olena2,3 (AUTHOR) olena@kth.se
Source: Materials (1996-1944). Jun2026, Vol. 19 Issue 12, p2520. 17p.
Subjects: Plasticizers, Filler materials, Polylactic acid, Photodegradation, Chemical decomposition, Surface energy, Fourier transform infrared spectroscopy, Polymer films
Abstract: Polylactic acid (PLA) is a promising biopolymer for environmentally friendly coating development. However, its UV radiation resistance has not yet been sufficiently studied, particularly in formulations containing plasticizers or fillers. In this study, a series of samples were prepared: pure PLA films, PLA films with plasticizers, filled composites, and films obtained from aqueous PLA dispersions. The samples were tested for UV resistance and characterized using FTIR spectroscopy, surface energy analysis, and topography. The results showed that UV irradiation of pure PLA caused carbonyl band broadening and a shift toward lower wavenumbers, water contact angle decrease and surface energy polar component increase. The effect of plasticizers was chemical composition-dependent; epoxy linoleic acid increased the degradation rate, whereas PEG-400 and menthol oleic acid reduced the carbonyl groups accumulation. Menthol oleic acid demonstrated the strongest stabilizing effect. The calcite and kaolin fillers promoted surface oxidation and hydrophilization, while coffee grounds biochar reduced the degradation rate. Films obtained from aqueous dispersions were the most sensitive to UV aging, as residual emulsifier significantly enhanced surface hydrophilization. [ABSTRACT FROM AUTHOR]
Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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Header DbId: egs
DbLabel: Engineering Source
An: 194907594
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PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: Design of UV-Resistant Polylactide-Based Coating Systems: Effect of Plasticizers and Fillers on Durability and Degradation Behavior.
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  Data: <searchLink fieldCode="AR" term="%22Myronyuk%2C+Oleksiy%22">Myronyuk, Oleksiy</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Baklan%2C+Denys%22">Baklan, Denys</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> m.domashevskyy@knute.edu.ua</i><br /><searchLink fieldCode="AR" term="%22Domashevskyi%2C+Myroslav%22">Domashevskyi, Myroslav</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Karavayev%2C+Taras%22">Karavayev, Taras</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sevastyanova%2C+Olena%22">Sevastyanova, Olena</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<i> olena@kth.se</i>
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  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Jun2026, Vol. 19 Issue 12, p2520. 17p.
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  Data: <searchLink fieldCode="DE" term="%22Plasticizers%22">Plasticizers</searchLink><br /><searchLink fieldCode="DE" term="%22Filler+materials%22">Filler materials</searchLink><br /><searchLink fieldCode="DE" term="%22Polylactic+acid%22">Polylactic acid</searchLink><br /><searchLink fieldCode="DE" term="%22Photodegradation%22">Photodegradation</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+decomposition%22">Chemical decomposition</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+energy%22">Surface energy</searchLink><br /><searchLink fieldCode="DE" term="%22Fourier+transform+infrared+spectroscopy%22">Fourier transform infrared spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Polymer+films%22">Polymer films</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Polylactic acid (PLA) is a promising biopolymer for environmentally friendly coating development. However, its UV radiation resistance has not yet been sufficiently studied, particularly in formulations containing plasticizers or fillers. In this study, a series of samples were prepared: pure PLA films, PLA films with plasticizers, filled composites, and films obtained from aqueous PLA dispersions. The samples were tested for UV resistance and characterized using FTIR spectroscopy, surface energy analysis, and topography. The results showed that UV irradiation of pure PLA caused carbonyl band broadening and a shift toward lower wavenumbers, water contact angle decrease and surface energy polar component increase. The effect of plasticizers was chemical composition-dependent; epoxy linoleic acid increased the degradation rate, whereas PEG-400 and menthol oleic acid reduced the carbonyl groups accumulation. Menthol oleic acid demonstrated the strongest stabilizing effect. The calcite and kaolin fillers promoted surface oxidation and hydrophilization, while coffee grounds biochar reduced the degradation rate. Films obtained from aqueous dispersions were the most sensitive to UV aging, as residual emulsifier significantly enhanced surface hydrophilization. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/ma19122520
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 17
        StartPage: 2520
    Subjects:
      – SubjectFull: Plasticizers
        Type: general
      – SubjectFull: Filler materials
        Type: general
      – SubjectFull: Polylactic acid
        Type: general
      – SubjectFull: Photodegradation
        Type: general
      – SubjectFull: Chemical decomposition
        Type: general
      – SubjectFull: Surface energy
        Type: general
      – SubjectFull: Fourier transform infrared spectroscopy
        Type: general
      – SubjectFull: Polymer films
        Type: general
    Titles:
      – TitleFull: Design of UV-Resistant Polylactide-Based Coating Systems: Effect of Plasticizers and Fillers on Durability and Degradation Behavior.
        Type: main
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            NameFull: Myronyuk, Oleksiy
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            NameFull: Baklan, Denys
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            NameFull: Domashevskyi, Myroslav
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            NameFull: Karavayev, Taras
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            NameFull: Sevastyanova, Olena
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            – D: 15
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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              Value: 19961944
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              Value: 19
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              Value: 12
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            – TitleFull: Materials (1996-1944)
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