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Long-Term Functional Stability of Organic and Inorganic Modified Luminescent Lyocell Fibers for Security Applications.

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Title: Long-Term Functional Stability of Organic and Inorganic Modified Luminescent Lyocell Fibers for Security Applications.
Authors: Erdman, Aleksandra1 (AUTHOR), Gabor, Jadwiga2 (AUTHOR), Brzezińska, Natalia2,3 (AUTHOR), Pyza, Maciej2,4 (AUTHOR), Popczyk, Magdalena1,2 (AUTHOR), Kulpiński, Piotr2,3 (AUTHOR), Swinarew, Andrzej S.2,3,4 (AUTHOR) andrzej.swinarew@us.edu.pl
Source: Materials (1996-1944). May2026, Vol. 19 Issue 9, p1767. 16p.
Subjects: Cellulose fibers, Inorganic compounds, Chemical reactions, Phosphors, Mechanical behavior of materials, Forgery, Photodegradation
Abstract: Luminescent cellulose-based fibers are promising materials for anti-counterfeiting applications because they can provide covert and spectrally distinguishable optical signatures compatible with paper- and textile-based authentication systems. In this study, Lyocell fibers modified with selected inorganic and organic luminescent compounds were subjected to accelerated xenon-lamp aging in order to evaluate their functional durability under simulated environmental exposure. The effects of aging on the mechanical properties and luminescent behavior of the fibers were investigated. The results showed that accelerated aging led to a reduction in tensile strength and elongation at break for all fiber variants, although the extent of these changes depended on the type of modifier. Spectroscopic analysis indicated that, despite changes in emission intensity, the characteristic luminescent responses of the modified fibers remained detectable after aging. These findings suggest that luminescent Lyocell fibers can retain their practical identification potential under the applied test conditions and may be considered promising candidates for use as covert security elements. The observed stability is attributed to the immobilization of luminophores within the cellulose matrix and the intrinsic photostability of the applied luminescent systems. At the same time, the study highlights the need for further investigations into the structural and photophysical stability of such systems under long-term environmental exposure. [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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DbLabel: Engineering Source
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  Data: Long-Term Functional Stability of Organic and Inorganic Modified Luminescent Lyocell Fibers for Security Applications.
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  Data: <searchLink fieldCode="AR" term="%22Erdman%2C+Aleksandra%22">Erdman, Aleksandra</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gabor%2C+Jadwiga%22">Gabor, Jadwiga</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Brzezińska%2C+Natalia%22">Brzezińska, Natalia</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pyza%2C+Maciej%22">Pyza, Maciej</searchLink><relatesTo>2,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Popczyk%2C+Magdalena%22">Popczyk, Magdalena</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kulpiński%2C+Piotr%22">Kulpiński, Piotr</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Swinarew%2C+Andrzej+S%2E%22">Swinarew, Andrzej S.</searchLink><relatesTo>2,3,4</relatesTo> (AUTHOR)<i> andrzej.swinarew@us.edu.pl</i>
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  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. May2026, Vol. 19 Issue 9, p1767. 16p.
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  Data: <searchLink fieldCode="DE" term="%22Cellulose+fibers%22">Cellulose fibers</searchLink><br /><searchLink fieldCode="DE" term="%22Inorganic+compounds%22">Inorganic compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+reactions%22">Chemical reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Phosphors%22">Phosphors</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Forgery%22">Forgery</searchLink><br /><searchLink fieldCode="DE" term="%22Photodegradation%22">Photodegradation</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Luminescent cellulose-based fibers are promising materials for anti-counterfeiting applications because they can provide covert and spectrally distinguishable optical signatures compatible with paper- and textile-based authentication systems. In this study, Lyocell fibers modified with selected inorganic and organic luminescent compounds were subjected to accelerated xenon-lamp aging in order to evaluate their functional durability under simulated environmental exposure. The effects of aging on the mechanical properties and luminescent behavior of the fibers were investigated. The results showed that accelerated aging led to a reduction in tensile strength and elongation at break for all fiber variants, although the extent of these changes depended on the type of modifier. Spectroscopic analysis indicated that, despite changes in emission intensity, the characteristic luminescent responses of the modified fibers remained detectable after aging. These findings suggest that luminescent Lyocell fibers can retain their practical identification potential under the applied test conditions and may be considered promising candidates for use as covert security elements. The observed stability is attributed to the immobilization of luminophores within the cellulose matrix and the intrinsic photostability of the applied luminescent systems. At the same time, the study highlights the need for further investigations into the structural and photophysical stability of such systems under long-term environmental exposure. [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/ma19091767
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      – Code: eng
        Text: English
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        PageCount: 16
        StartPage: 1767
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      – SubjectFull: Cellulose fibers
        Type: general
      – SubjectFull: Inorganic compounds
        Type: general
      – SubjectFull: Chemical reactions
        Type: general
      – SubjectFull: Phosphors
        Type: general
      – SubjectFull: Mechanical behavior of materials
        Type: general
      – SubjectFull: Forgery
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      – SubjectFull: Photodegradation
        Type: general
    Titles:
      – TitleFull: Long-Term Functional Stability of Organic and Inorganic Modified Luminescent Lyocell Fibers for Security Applications.
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            NameFull: Erdman, Aleksandra
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            NameFull: Gabor, Jadwiga
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            NameFull: Brzezińska, Natalia
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            NameFull: Pyza, Maciej
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            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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              Value: 19
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