Use este identificador para citar ou linkar para este item:
http://repositorio.ufla.br/jspui/handle/1/12563
Título: | Extrusão de filmes biodegradáveis de amido de milho termoplástico adicionado de quitosana plastificada |
Título(s) alternativo(s): | Extrusion of biodegradable films of thermoplastic corn starch added from plastified chitosan |
Autores: | Pinheiro, Ana Carla Marques Oliveira, Juliano Elvis Guimarães Junior, Mário Souza, Vanessa Rios de |
Palavras-chave: | Amido termoplástico Quitosana termoplástica Extrusão Polímeros biodegradáveis Thermoplastic starch Thermoplastic chitosan Extrusion Biodegradable polymers |
Data do documento: | 24-Mar-2017 |
Editor: | Universidade Federal de Lavras |
Citação: | MENDES, J. F. Extrusão de filmes biodegradáveis de amido de milho termoplástico adicionado de quitosana plastificada. 2017. 89 p. Dissertação (Mestrado em Engenharia de Biomateriais)-Universidade Federal de Lavras, Lavras, 2017. |
Resumo: | The objective was to evaluate the effects of addition of 5 and 10% (m / m) of thermoplastic chitosan (TPC) in the development of biodegradable polymer blends of thermoplastic corn starch-chitosan obtained by extrusion. For this purpose were used corn starch, chitosan (Molecular weight: 90-310 KDa and Degree of deacetylation (GD): 75-85%), acetic acid, and glycerol (plasticizer). The biodegradable TPS/TPC blends were processed in a double screw extruder (co-rotating) in concentrations of 5% and 10% (w/w) of chitosan to obtain mixing pellets. Then these pellets were extruded in a single-screw extruder in which ribbons produced were hot pressed to obtain the films. The interactions between biopolymers and the blend morphology, thermal and mechanical properties were investigated. The possible interactions between the starch and chitosan thermoplastic molecules were evaluated by XDR and FTIR techniques. Scanning electron microscopy (SEM) analyzes showed a homogeneous fracture surface without the presence of starch granules or chitosan aggregates. Although the incorporation of thermoplastic chitosan has caused a decrease in tensile strength and rigidity, biopolymer films with better extensibility and thermal stability were obtained. |
URI: | http://repositorio.ufla.br/jspui/handle/1/12563 |
Aparece nas coleções: | Engenharia de Biomateriais – Mestrado (Dissertações) |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
---|---|---|---|---|
DISSERTAÇÃO_Extrusão de filmes biodegradáveis de amido de milho termoplástico adicionado de quitosana plastificada.pdf | 1,22 MB | Adobe PDF | Visualizar/Abrir |
Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.