Produção de nanoestruturas de gipsita por esfoliação em meio líquido
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This thesis addresses the production and characterization of nanomaterials made from gypsum (CaSO_4.2H_2O) using the liquid-phase exfoliation method. Nanoscience and nanotechnology have revolutionized science and technology by enabling the manipulation of materials at the nanoscale, providing unique properties and innovative applications. This work is motivated by the search for alternatives to graphene and its derivatives, such as graphene oxide, for technological applications, considering the cost and abundance of the materials. Gypsum is a mineral with peculiar properties, including ease of dehydration and rehydration, making it valuable in the construction, medical, and agricultural industries. However, its potential as a nanomaterial has not been widely explored. The liquid-phase exfoliation method is chosen for producing gypsum nanomaterials due to its versatility, scalability, and effectiveness across various materials. The objectives of this work include optimizing the liquid-phase exfoliation routes, characterizing the gypsum nanostructures obtained through scanning probe microscopy, and performing statistical analysis of the dimensions of the nanomaterials produced under different exfoliation conditions. Characterization techniques include scanning probe microscopy, focusing on atomic force microscopy, and X-ray diffraction. X-ray diffraction is employed to characterize the samples and confirm the presence of gypsum. By producing and characterizing gypsum nanomaterials, this study will contribute to scientific and technological advancement, offering valuable alternatives to currently used materials. Furthermore, the research may also provide economic benefits for regions where gypsum is extracted.
