Resumen de Synthesis and Characterization of Chitosan-PHB Blends

Galo Cardenas, Johana Sanzana L, Lucia H. Inoccentini Mei

• español

  Se obtienen blendas de quitosano poli (b -1-4)-2-amino-2-deoxi-D-glucopiranosa, CH, el producto desacetilado de las quitina, con poli(3-hidroxibutirato), PHB, usando razones en peso de 90/10, 75/25, 50/50, 25/75 y 10/90 de quitosano con PHB.

  Las blendas se preparan usando ácido trifluoracético como so-solvente bajo continua agitación a temperatura ambiente. El quitosano se obtiene desde quitina separada de caparazones de langostinos, `Mv = 81.430 Daltons y con una desacetilación de 91 % (DS). El PHB proviene de un proceso de fermentación biológica (Copersucar, Sao Paulo, Brazil) y su `Mv = 183.200 Daltons. Los productos elatoméricos fueron caracterizados por análisis elemental, termogravimetría, FT-IT y microscopía electrónica de barrido (SEM).

• English

  Blends of chitosan, [poly( ß-1,4)-2-amino-2-deoxy-D-glucopyranose], CH, the desacetylated product of chitin, with poly(3-hydroxybutyrate), PHB, usingratios of 90/10, 75/25, 50/50, 25/75, and 10/90 of chitosan-PHB were obtained.

  The blends were obtained using trifluoracetic acid as co-solvent under continue stirring at room temperature. Chitosan was obtained from shrimps shells of `Mv = 81,430 Daltons and 91% deacetylation degree, DS, was used. The PHB comes from biological fermentation process (Copersucar, Sao Paulo, Brazil) and their `Mv = 183,200 Daltons. The elastomeric products were characterized by elemental analyses, thermogravimetry, FT-IR and SEM.