Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 86, Issue 3, Pages 615-621Publisher
JOHN WILEY & SONS INC
DOI: 10.1002/app.10898
Keywords
surfactant-free nanoparticles; wood preservatives; fungicides; tebuconazole; chlorothalonil
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Polymeric nanoparticles containing the fungicides tebuconazole and chlorothalonil were prepared by a simple, surfactant-free method and found to have significantly smaller median particle diameters and more stable aqueous suspensions than their surfactant-stabilized counterparts. These more stable suspensions were delivered into southern yellow pine and birch wood with greater efficiency than the equivalent surfactant-stabilized nanoparticle suspensions. We found that the suspensions protected the treated wood against fungal attack by Gloeophyllum trabeum, a common brown rot wood decay fungus, and Trametes versicolor, a common white rot wood decay fungus, at low tebuconazole and chlorothalonil contents in the wood. Southern pine lost 5% or less of its mass after 55 days of exposure to G. trabeum when the tebuconazole or chlorothalonil content in the wood was only 0.4 kg/m(3), while a tebuconazole or chlorothalonil content of 0.8 kg/m(3) in birch wood was sufficient to bring its mass loss to less than 5% after 55 days of exposure to T. versicolor. (C) 2002 Wiley Periodicals, Inc.
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