Abstract
Heartwood extracts of Acacia confusa (HEAc) were proven to have the capability of ameliorating wood photostability. However, the efficacy of photostability compared with that of commercial photostabilizers was unknown. The aim of this study was to examine whether HEAc can be used as commercial photostabilizers. Comparison was made among commercially available photostabilizers, UV absorber (Eversorb 80, EV80) and hindered amine light stabilizer (Eversorb 93, EV93). Photostability of wood slices soaked in 1, 5 and 10 % HEAc or 1 % commercial photostabilizers (EV80 or EV93) solutions was evaluated. The discoloration of 5 and 10 % HEAc-treated specimens was significantly reduced after UV irradiation. Furthermore, lignin degradation and carbonyl formation were concurrently inhibited by 5 and 10 % HEAc treatments after UV irradiation. Interestingly, 1 % HEAc treatment showed similar effectiveness compared with EV80 treatment, while 5 and 10 % HEAc treatments showed better effectiveness than EV80 treatment. HEAc can absorb UV light and quench radicals; hence, wood photodegradation was consequently prevented. These results revealed that HEAc has great potential to be developed as a natural photostabilizer.
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01 September 2017
An erratum to this article has been published.
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Acknowledgments
The authors acknowledge the financial support (NSC 102-2313-B-002-023-MY3) from the Ministry of Science and Technology Taiwan. We are also wishing to thank assistant research fellow Min-Jay Chung (the Experimental Forest, National Taiwan University) and Everlight Chemical Industrial Co. for the supports of materials and associate professor rank specialist Chun-Chieh Huang (Department of Wood Science and Design, National **tung University of Science and Technology) for the assistance of wood processing.
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An erratum to this article is available at https://doi.org/10.1007/s00226-017-0950-5.
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Chang, TC., Hsiao, NC., Yu, PC. et al. Exploitation of Acacia confusa heartwood extract as natural photostabilizers. Wood Sci Technol 49, 811–823 (2015). https://doi.org/10.1007/s00226-015-0722-z
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DOI: https://doi.org/10.1007/s00226-015-0722-z