Photodegradation Mechanisms and Anti-Aging Strategies of Wood Coatings: A Comprehensive Review.
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| Title: | Photodegradation Mechanisms and Anti-Aging Strategies of Wood Coatings: A Comprehensive Review. |
|---|---|
| Authors: | Xia, Meng1 (AUTHOR), Gao, Hanyun1,2 (AUTHOR), Feng, Xinhao1,2 (AUTHOR), Liu, Xinyou1,2 (AUTHOR) liu.xinyou@njfu.edu.cn |
| Source: | Polymers (20734360). May2026, Vol. 18 Issue 9, p1090. 18p. |
| Subjects: | Photodegradation, Ultraviolet filters, Coating processes, Polymer degradation, Biodegradable materials, Nanocoatings, Wood preservatives |
| Abstract: | Wood coatings play a critical role in protecting wood substrates from environmental degradation, particularly ultraviolet (UV)-induced photodegradation. This review comprehensively examines the mechanisms of wood coating photodegradation, the factors influencing their durability, and current anti-aging strategies. Photodegradation arises from polymer chain scission, chemical structure reorganization, and photo-oxidation of lignin and cellulose, leading to coating chalking, cracking, gloss loss, and color changes, ultimately compromising wood mechanical properties and service life. Key anti-aging strategies include UV absorbers, which convert harmful UV radiation into heat; hindered amine light stabilizers (HALSs) that capture free radicals and quench excited-state molecules; barrier and shielding materials that form dense physical or nanostructured networks to block UV penetration and enhance mechanical and water resistance; and antioxidants that neutralize free radicals or decompose peroxides at the molecular level. Each approach can be employed individually or synergistically to enhance coating durability. Challenges remain in achieving long-term outdoor stability, balancing transparency and UV shielding, optimizing nanoparticle dispersion, and maintaining the activity of natural antioxidants. Future research should focus on multifunctional composite coatings integrating bio-based materials and nanotechnology, smart responsive systems, adaptive protection mechanisms, and standardized long-term evaluation protocols. These advancements will facilitate the development of high-performance, sustainable wood coatings and promote the value-added utilization of wood resources. [ABSTRACT FROM AUTHOR] |
| Copyright of Polymers (20734360) 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.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 193716225 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Photodegradation Mechanisms and Anti-Aging Strategies of Wood Coatings: A Comprehensive Review. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Xia%2C+Meng%22">Xia, Meng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gao%2C+Hanyun%22">Gao, Hanyun</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Feng%2C+Xinhao%22">Feng, Xinhao</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Xinyou%22">Liu, Xinyou</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> liu.xinyou@njfu.edu.cn</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Polymers+%2820734360%29%22">Polymers (20734360)</searchLink>. May2026, Vol. 18 Issue 9, p1090. 18p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Photodegradation%22">Photodegradation</searchLink><br /><searchLink fieldCode="DE" term="%22Ultraviolet+filters%22">Ultraviolet filters</searchLink><br /><searchLink fieldCode="DE" term="%22Coating+processes%22">Coating processes</searchLink><br /><searchLink fieldCode="DE" term="%22Polymer+degradation%22">Polymer degradation</searchLink><br /><searchLink fieldCode="DE" term="%22Biodegradable+materials%22">Biodegradable materials</searchLink><br /><searchLink fieldCode="DE" term="%22Nanocoatings%22">Nanocoatings</searchLink><br /><searchLink fieldCode="DE" term="%22Wood+preservatives%22">Wood preservatives</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Wood coatings play a critical role in protecting wood substrates from environmental degradation, particularly ultraviolet (UV)-induced photodegradation. This review comprehensively examines the mechanisms of wood coating photodegradation, the factors influencing their durability, and current anti-aging strategies. Photodegradation arises from polymer chain scission, chemical structure reorganization, and photo-oxidation of lignin and cellulose, leading to coating chalking, cracking, gloss loss, and color changes, ultimately compromising wood mechanical properties and service life. Key anti-aging strategies include UV absorbers, which convert harmful UV radiation into heat; hindered amine light stabilizers (HALSs) that capture free radicals and quench excited-state molecules; barrier and shielding materials that form dense physical or nanostructured networks to block UV penetration and enhance mechanical and water resistance; and antioxidants that neutralize free radicals or decompose peroxides at the molecular level. Each approach can be employed individually or synergistically to enhance coating durability. Challenges remain in achieving long-term outdoor stability, balancing transparency and UV shielding, optimizing nanoparticle dispersion, and maintaining the activity of natural antioxidants. Future research should focus on multifunctional composite coatings integrating bio-based materials and nanotechnology, smart responsive systems, adaptive protection mechanisms, and standardized long-term evaluation protocols. These advancements will facilitate the development of high-performance, sustainable wood coatings and promote the value-added utilization of wood resources. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Polymers (20734360) 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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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/polym18091090 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 18 StartPage: 1090 Subjects: – SubjectFull: Photodegradation Type: general – SubjectFull: Ultraviolet filters Type: general – SubjectFull: Coating processes Type: general – SubjectFull: Polymer degradation Type: general – SubjectFull: Biodegradable materials Type: general – SubjectFull: Nanocoatings Type: general – SubjectFull: Wood preservatives Type: general Titles: – TitleFull: Photodegradation Mechanisms and Anti-Aging Strategies of Wood Coatings: A Comprehensive Review. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Xia, Meng – PersonEntity: Name: NameFull: Gao, Hanyun – PersonEntity: Name: NameFull: Feng, Xinhao – PersonEntity: Name: NameFull: Liu, Xinyou IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 20734360 Numbering: – Type: volume Value: 18 – Type: issue Value: 9 Titles: – TitleFull: Polymers (20734360) Type: main |
| ResultId | 1 |
