Produção e caracterização de filmes de poli (3-hidroxibutirato) (PHB) com alginato de sódio esterificado e poli (etileno glicol) (PEG)

• Autor(a) principal: Lopes, Jamilly Ribeiro
• Data de Publicação: 2016
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UFS
• Texto Completo: https://ri.ufs.br/handle/riufs/3468
• topic: Materiais; Biopolímeros; Alginatos; Polietileno; Polímeros na medicina; Curativos; Esterificação; Biopolymers; Alginates; Polyethylene; Polymers in medicine; Dressings; Esterification; ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA

Alternative materials have long been studied and developed to replace conventional skin dressings due to the emergence of new biopolymers and development of new polymeric film fabrication techniques. As a new material for polymeric dressings, films of poly (hydroxybutyrate) (PHB) blended with esterified alginate (ALG-e) and Poly (ethyleneglycol) were studied. The esterification of sodium alginate (ALG-e) generated a material with some amphiphilic characteristics and increased its compatibility with the PHB. PEG was added as plasticizer in PHB/ALG-e films, since PEG is often used in blends with PHB to improve its flexibility and reduce its hydrophobicity. At the amounts studied, it was found that both PEG and ALG-e increase the degree of crystallinity, but a decrease in the hydrophobic nature of PHB films was observed. At the maximum concentration of ALG-e and PEG used an increase in water vapor permeability and a decrease in tensile strength was reached due to the synergistic effect caused by better homogenization of PEG and ALG-e in the PHB matrix.