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Effects of Adding Antioxidants on the Lightfastness Improvement of Refined Oriental Lacquer

Refined oriental lacquer (ROL) is a natural polymeric material with a satiny texture, elegant beauty, and high durability for wood furniture and handicraft finishing. However, its poor lightfastness, which results from the photo-degradation or photo-oxidation of its main component, catechol derivati...

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Autores principales: Lu, Kun-Tsung, Lee, Jia-Jhen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8036300/
https://www.ncbi.nlm.nih.gov/pubmed/33807478
http://dx.doi.org/10.3390/polym13071110
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author Lu, Kun-Tsung
Lee, Jia-Jhen
author_facet Lu, Kun-Tsung
Lee, Jia-Jhen
author_sort Lu, Kun-Tsung
collection PubMed
description Refined oriental lacquer (ROL) is a natural polymeric material with a satiny texture, elegant beauty, and high durability for wood furniture and handicraft finishing. However, its poor lightfastness, which results from the photo-degradation or photo-oxidation of its main component, catechol derivatives, must be improved for its widespread utilization. In this study, two experiments were performed. First, five types of antioxidants, including three primary antioxidants, such as 2,2′-methylenebis(6-nonyl-p-cresol) (coded as AO-1), 2,2′-methylenebis(6-tert-butyl-4-methylphenol) (AO-2), and bis [4-(2-phenyl-2-propyl) phenyl] amine (AO-N), and two secondary antioxidants, such as tris (2,4-ditert-butylphenyl) phosphite (AO-P) and dilauryl thiodipropionate (AO-S), were investigated to determine which is the most effective for improving the lightfastness of ROL. Secondly, the appropriate quantity of the best antioxidant, including 0, 1, 2, 3, 5, and 10 phr, was also determined. The lightfastness parameters, such as brightness difference (ΔL*), yellowness difference (ΔYI), and color difference (ΔE*), as well as other coating and film properties, were assessed. The results showed that the primary antioxidants had higher efficiency than secondary antioxidants for improving the lightfastness of ROL. Among the primary antioxidants, the 5 phr AO-N was the most effective at improving the lightfastness of ROL; however, 1 phr addition had already shown significantly improved efficiency. In addition, the drying time of ROL was extended and film properties decreased when increasing the content of AO-N, but the 1-phr-containing ROL displayed superior film properties, especially adhesion and bending resistance, compared with the raw ROL film.
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spelling pubmed-80363002021-04-12 Effects of Adding Antioxidants on the Lightfastness Improvement of Refined Oriental Lacquer Lu, Kun-Tsung Lee, Jia-Jhen Polymers (Basel) Article Refined oriental lacquer (ROL) is a natural polymeric material with a satiny texture, elegant beauty, and high durability for wood furniture and handicraft finishing. However, its poor lightfastness, which results from the photo-degradation or photo-oxidation of its main component, catechol derivatives, must be improved for its widespread utilization. In this study, two experiments were performed. First, five types of antioxidants, including three primary antioxidants, such as 2,2′-methylenebis(6-nonyl-p-cresol) (coded as AO-1), 2,2′-methylenebis(6-tert-butyl-4-methylphenol) (AO-2), and bis [4-(2-phenyl-2-propyl) phenyl] amine (AO-N), and two secondary antioxidants, such as tris (2,4-ditert-butylphenyl) phosphite (AO-P) and dilauryl thiodipropionate (AO-S), were investigated to determine which is the most effective for improving the lightfastness of ROL. Secondly, the appropriate quantity of the best antioxidant, including 0, 1, 2, 3, 5, and 10 phr, was also determined. The lightfastness parameters, such as brightness difference (ΔL*), yellowness difference (ΔYI), and color difference (ΔE*), as well as other coating and film properties, were assessed. The results showed that the primary antioxidants had higher efficiency than secondary antioxidants for improving the lightfastness of ROL. Among the primary antioxidants, the 5 phr AO-N was the most effective at improving the lightfastness of ROL; however, 1 phr addition had already shown significantly improved efficiency. In addition, the drying time of ROL was extended and film properties decreased when increasing the content of AO-N, but the 1-phr-containing ROL displayed superior film properties, especially adhesion and bending resistance, compared with the raw ROL film. MDPI 2021-03-31 /pmc/articles/PMC8036300/ /pubmed/33807478 http://dx.doi.org/10.3390/polym13071110 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
Lu, Kun-Tsung
Lee, Jia-Jhen
Effects of Adding Antioxidants on the Lightfastness Improvement of Refined Oriental Lacquer
title Effects of Adding Antioxidants on the Lightfastness Improvement of Refined Oriental Lacquer
title_full Effects of Adding Antioxidants on the Lightfastness Improvement of Refined Oriental Lacquer
title_fullStr Effects of Adding Antioxidants on the Lightfastness Improvement of Refined Oriental Lacquer
title_full_unstemmed Effects of Adding Antioxidants on the Lightfastness Improvement of Refined Oriental Lacquer
title_short Effects of Adding Antioxidants on the Lightfastness Improvement of Refined Oriental Lacquer
title_sort effects of adding antioxidants on the lightfastness improvement of refined oriental lacquer
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8036300/
https://www.ncbi.nlm.nih.gov/pubmed/33807478
http://dx.doi.org/10.3390/polym13071110
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