Abstract
Despite the potential application of nanotechnology in the agricultural sector, it is not as competitive as other industrial sectors because these approaches do not demonstrate a sufficient economic return to counterbalance the high production costs. For biocidal purposes, the reduction of the initial costs can be addressed if biogenic nanosilica and nanofibrillated cellulose were used to prepare nanocomposite for further utilization as support for slow-release of tebuconazole. Infrared spectroscopy and thermogravimetric analysis revealed that biocide was entrapped in the cellulose/silica nanocomposites network. The scanning electron microscopy and X-ray microtomography evaluation showed the nanocomposite’s microstructure based on irregular shape nanosilica blended by nanofibrillated cellulose in a randomly organized network. Elemental mapping images showed the tebuconazole better dispersed in the composite blended with lower content of cellulose. The nanofibrillated cellulose played an important role in the release rate of the biocide mainly at short-term periods. At 15 days of immersion, the pure biocide had 95 % release compared with 30–45 % release of the tebuconazole loaded in the nanocomposites.
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Acknowledgments
The authors would like to thank the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior and Fundação Araucária for the scholarships. We also thank Centro Nacional de Pesquisa em Energia e Materiais (CNPEM) for carrying out the analysis of X-Ray microtomography.
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Mattos, B.D., Magalhães, W.L.E. Biogenic nanosilica blended by nanofibrillated cellulose as support for slow-release of tebuconazole. J Nanopart Res 18, 274 (2016). https://doi.org/10.1007/s11051-016-3586-8
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DOI: https://doi.org/10.1007/s11051-016-3586-8