Abstract
Biodegradable polymer microcapsules have been used as a control sustained release system with many applications. Studies reveal that the incorporation of nanoparticles improves matrix properties, even more so if the clay is modified. The objective of this work was to compare microcapsules of poly (succinate-co-butylene lactate) (PBSL ) reinforced with Brazilian clay, composed of smectites and kaolinite, in its natural (MMT/K) and modified (O-MMT/K) forms. Nanocomposites and microcapsules were synthesized by emulsification-diffusion of solvent and solvent diffusion methods. Its characterization was then performed by scanning electron microscopy (SEM), stereomicroscopy and wide-angle X-ray diffraction (XRD). The results reported corroborate that PBSL /OMMT-K form an intercalated montmorillonite and kaolinite nanostructure, capable of generating uniform spherical microcapsules with diameter values smaller than that of PBSL /MMT-K, reaching 5–10 μm. DRX indicates that there was a real change in the clay structure. The incorporation of modified clay showed an improvement in surface quality and the strength of microcapsules , making it possible to produce smaller sizes.
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We thank to Coordination for Improvement of Higher Education Personnel (CAPES) and São Paulo Research Foundation (FAPESP) for financial support.
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Michel, B.B., Valenzuela-Diaz, F.R., Wiebeck, H., Hui, W.S., Silva-Valenzuela, M.G. (2018). Evaluation of Microcapsules of PBSL/MMT-K and PBSL/OMMT-K Nanocomposites. In: Li, B., et al. Characterization of Minerals, Metals, and Materials 2018 . TMS 2018. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-72484-3_53
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DOI: https://doi.org/10.1007/978-3-319-72484-3_53
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