Citric acid as multifunctional agent in blowing films of starch/PBAT


Autoria(s): Garcia,Patrícia Salomão; Grossmann,Maria Victória Eiras; Yamashita,Fábio; Mali,Suzana; Dall'Antonia,Luiz Henrique; Barreto,Wagner José
Data(s)

01/09/2011

Resumo

Citric acid was used as a compatibilizer in the production of starch and PBAT films plasticized with glycerol and processed by blow extrusion. Films produced were characterized by WVP, mechanical properties, FT-IR-ATR and SEM. WPV ranged from 3.71 to 12.73×10-11 g m-1 s-1 Pa-1, while tensile strength and elongation at break ranged from 1.81 to 7.15 MPa and from 8.61 to 23.63%, respectively. Increasing the citric acid concentration improved WVP and slightly decreased film resistance and elongation. The films micrographs revealed a more homogeneous material with the addition of citric acid. However, the infrared spectra revealed little about cross-linking esterification reaction

Formato

text/html

Identificador

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422011000900005

Idioma(s)

en

Publicador

Sociedade Brasileira de Química

Fonte

Química Nova v.34 n.9 2011

Palavras-Chave #starch #polyester #compatibilization
Tipo

journal article