Estudos físico-químicos da formação de filmes finos de carbon black assistida por vórtice

• Ano de defesa: 2013
• Autor(a) principal: Marco Túlio Fonseca Rodrigues
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; UFMG
• Palavras-chave em Português: Carbon black; Armazenamento de energia; Coloides; Filmes híbridos; Nanotubos de carbono; Filmes finos; Energia Armazenamento; Físico-química; Química
• Link de acesso: http://hdl.handle.net/1843/SFSA-979QWC

In this work a new self-assembly technique is presented, allowing the fast formation of carbon black thin films. It consists in the controlled addition of a stable carbon material's dispersion over the water surface, disturbed by a vortex. The vortex, although not essential for the film formation, was found to drastically improve film homogeneity. A physical chemical study concerning how several parameters could be used to tune film properties was also conducted. The selfassembledfilms, which can be picked up in any hydrophilic substrate, showed a good electrical conductivity and a high optical transparency. As an application example, films about 200 nm thick were employed as supercapacitor electrodes.