期刊
HOLZFORSCHUNG
卷 62, 期 3, 页码 264-269出版社
WALTER DE GRUYTER GMBH
DOI: 10.1515/HF.2008.038
关键词
antioxidant activity; chromones; decay fungi; flavones; Fe3+ reducing activity; free radicals; fungicidal activity; heartwood; metal chelation; natural durability; organic biocides; wood preservation
Wood products for exterior residential applications have long been protected with metallic preservatives. However, environmental and disposal concerns and governmental regulations have resulted in a growing trend to employ organic systems based on relatively benign and expensive agrochemicals. To develop organic preservatives that have increased efficacy and lower cost, various groups are studying the biocidal and non-biocidal properties of extractives present in naturally durable heart-woods. In this study, we determined the fungicidal, free radical scavenger/antioxidant, metal chelation and Fe3+ reducing properties of some flavones and flavonoid analogs and chromones. The results support our earlier hypothesis that the abiotic antioxidant, Fe3+ reduction and subsequent metal complexation properties, in combination with the extractives' fungicidal properties, all have a role in natural durability. Consequently, it may be possible to employ non-biocidal additive(s) with the above abiotic properties to enhance the efficacy of the relatively expensive organic agrochemicals used to protect wood.
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