Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/11199
Título: Modificação superficial de fibras de juta com descarga corona para melhora da aderência com matriz poliéster
Título(s) alternativo(s): Juta modification of fiber surface with corona discharge for improvement of grip with polyester matrix
Autores: Tonoli, Gustavo Henrique Denzin
Silva, Flávio de Andrade
Carvalho, Elisângela Elena Nunes
Albuquerque, Luiz Roberto Marques
Palavras-chave: Fibras de juta
Descarga corona
Teste de Pullout
Modificação superficial
Juta fibers
Corona discharge
Pullout test
Superficial change
Data do documento: 25-Mai-2016
Editor: Universidade Federal de Lavras
Citação: CAMPOMORI, J. B. Modificação superficial de fibras de juta com descarga corona para melhora da aderência com matriz poliéster. 2016. 58 p. Dissertação (Mestrado em Ciência e Tecnologia da Madeira)-Universidade Federal de Lavras, Lavras, 2016.
Resumo: Seeking alternatives for the total or partial substitution of synthetic fibers for natural fibers, with reinforcement in polymeric materials, this work was conducted with the objective of evaluating the treatment with corona discharge on the adherence of juta fibers with resin. The fibers were exposed to corona discharge for 1, 5, 10 and 15 minutes, as well as after treatment with hot water, molding composites fiber-reinforced with filaments treated for 10 and 15 minutes, and without the treatment. The chemical structures were evaluated by spectrometry in the region of Fourier transform infrared with attenuated total reflection (FTIR/ATR), observing the formation of a new band and the increase in the absorption of groupings with oxygen. The thermal analyses, such as thermogravimetry (TG) and differential scanning calorimetry (DSC) revealed the degradation of cellulose, hemicellulose and lignin. The microstructural characterization by scanning electron microscopy (SEM) showed changes in the surface of the fiber, such as roughness, superficial depressions, surface degradation and cavity formation. The adhesion of the fibers was evaluated by the pullout test, allowing us to verify the increase in adhesion strength after treatment with corona discharge. In conclusion, the treatment with corona discharge changes the surface of the juta fibers, resulting in better adherence with the resin.
URI: http://repositorio.ufla.br/jspui/handle/1/11199
Aparece nas coleções:Ciência e Tecnologia da Madeira - Mestrado (Dissertações)



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