Data/hora: 12/06/2024 19:46:59

Biblioteca(s): | Embrapa Florestas.
Data corrente: | 10/07/2017
Data da última atualização: | 11/07/2017
Autoria: | MATTOS, B. D.; MAGALHAES, W. L. E.
Afiliação: | Bruno D. Mattos, Doutorando da UFPR; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF.
Título: | Design and preparation of carbendazim-loaded alumina nanoparticles as a controlled-release biocide for wood protection.
Ano de publicação: | 2017
Fonte/Imprenta: | International Biodeterioration & Biodegradation, v. 123, p. 174-181, Sept. 2017.
DOI: | http://dx.doi.org/10.1016/j.ibiod.2017.06.019
Idioma: | Inglês
Conteúdo: | Biocide delivery systems are intelligent strategies towards improving the efficiency of biocides over time. Here, we have developed a biocide system by loading alumina nanoparticles with carbendazim through surfactant-assisted ball milling. The obtained biocides were further validated by their impregnation into pinewood, followed by in vitro fungi tests. Fourier-transformed infrared spectroscopy stated physical adsorption of carbendazim on alumina, while the thermogravimetric analysis revealed its adsorption in a pseudo-molecular level. The carbendazim loading efficiency was improved after surfactant addition, which was also fundamental to effectively impregnate the pinewood. The biocide release profiles could be described using the parabolic-diffusion and Korsmeyer-Peppas kinetic models, which fitted the experimental data with determination coefficients over 0.9. After 600 h, the biocide systems have released 42e76% of carbendazim, where systems with higher biocide content released faster. The pinewood solid samples were completely impregnated with the prepared biocides; however, it tended to concentrate on the wood surface. A biocide retention of only 0.4 kg m3 of sufficient to increase in 10 times the decay resistance of the pinewood, indicating very promising results.
Palavras-Chave: | Alumina; Engineered nanoparticles; Liberacão lenta; Nanobiocida; Nanobiocides; Pinewood; Slow release; Surfactant-assisted ball milling; Tratamento de madeira.
Thesagro: | Madeira; Oxido de alumínio.
Thesaurus Nal: | Aluminum oxide; Decay resistance; Wood treatment.
Categoria do assunto: | X Pesquisa, Tecnologia e Engenharia
Registro original: | Embrapa Florestas (CNPF)
Exemplares: | CNPF - (55872-1) - UPC - AP - DD -  -  -  - DIS