Influência do glicerol em membranas de quitosana

• Autor(a) principal: Furtado, Laíse Moura
• Data de Publicação: 2016
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/38225
• topic: Quitosana.; Glicerol.; Propriedades Mecânicas.; Índice de intumescimento.; DRX.; Swelling Index. XRD.; Chitosan.; Glycerol.; Mechanical Properties.; CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ORGANICA::POLIMEROS E COLOIDES

This work investigated effects of the addition of glycerol in chitosan membranes and how responded your mechanical properties and water sorption capacity. The membranes were obtained by the casting method and the glycerol was added in chitosan powder in two concentrations: 10 % (CS10) and 25 % (CS25). The membranes were characterized by XRD, mechanical tests, swelling index and infrared absorption spectroscopy (FTIR). Infrared results confirmed the incorporation of glycerol into chitosan membranes. By XRD, increased crystallinity was observed with the addition of 10% glycerol, while CS25 remained similar to pure chitosan (CS). These characteristics were corroborated by the mechanical properties, because it was seen that CS25 has higher ductility, while CS10 is stiffer. The swelling index for the membranes in neutral media shows that the presence of glycerol confers hydrophilic character. And the CS25 reduces absorption capacity in pH 4, however CS10 has the swelling index favored in this media.