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Title: Extrusão de filmes biodegradáveis de amido de milho termoplástico adicionado de quitosana plastificada
Other Titles: Extrusion of biodegradable films of thermoplastic corn starch added from plastified chitosan
Authors: Pinheiro, Ana Carla Marques
Oliveira, Juliano Elvis
Guimarães Junior, Mário
Souza, Vanessa Rios de
Keywords: Amido termoplástico
Quitosana termoplástica
Polímeros biodegradáveis
Thermoplastic starch
Thermoplastic chitosan
Biodegradable polymers
Issue Date: 24-Mar-2017
Publisher: Universidade Federal de Lavras
Citation: 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.
Abstract: 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.
Appears in Collections:Engenharia de Biomateriais – Mestrado (Dissertações)

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