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Obtenção do grafeno através da esfoliação em fase líquida do grafite

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Resumo:The different methods of obtaining two-dimensional materials are being researched intensively, due to their promising physical and chemical properties. Among the methods of obtaining graphene, the liquid phase exfoliation (LPE) of graphite is proving to be a relatively simple and efficient process for the production of flakes of high quality and large scale. It is primarily based on the separation of the layers of graphite in liquids, such as common organic solvents and aqueous surfactant solutions. In this work the exfoliation of graphite was performed in liquid phase by sonication in aqueous suspension in the presence of an industrial reagent. A comparison with suspensions not using the polymeric surfactant indicates that its presence is necessary, because it prevents the re-agglomeration of the layers after sonication, through the multipolar and electrostatic repulsion mechanism. This result coincides with the reports of most recent works on liquid-phase exfoliation of graphite.
Autores principais:Camargo, Elaine Farneze de
Assunto:grafeno esfoliação em fase líquida espectroscopia Raman graphene liquid phase exfoliation Raman spectra CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA
Ano:2016
País:Brasil
Tipo de documento:dissertação de mestrado
Tipo de acesso:acesso aberto
Instituição associada:IBICT
Idioma:português
Origem:Oasisbr

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