Estudo da biodegradação da blenda de poli (e-caprolactona) e amido modificado em meios solido e liquido

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

Increasing environmental concens and the waste management policies in the last decade have prompted the use of natural-based biodegradable materials instead od nonbiodegradable petrochemical - basead plastic. The present work it investigated the biodegradation in soil of a PCL/Starch-adipate blend, a natural - based material, according to the ASTM D5988-96 standart and Anderson (1982). Furthermore, it was investigated the biodegradation of this material in liquid medium, according to the ASTM 6691-01 standart and Megaert et al (2000). During the soil tests,the biodegradation was indicated by CO IND. 2 evolution and mass loss measurements. In the liquid medium, the biodegradation was indicated by mass loss measurements only. Differential Scanning Calorimetry (DSC) was used to follow the crystallinity change in samples treated in liquid and solid medium. It wa observed that the blend reached 70% of mineralization after 90 days of soil incubation. According to the ASTM D 6400, this is a strong indication that the blend is biodegradable. The mass loss of blend sample incubated in soil was higher than for the sample incubated in liquid, showing that the biodegradation in soil was very efficient

ASSUNTO(S)

polimeros - biodegradação blends polysaccharides mistura (quimica) polissacarideos amido biodegradação biodegradation polymers biodegradation starch

ACESSO AO ARTIGO

Documentos Relacionados