CITRIC ACID AS MULTIFUNCTIONAL AGENT IN BLOWING FILMS OF STARCH/PBAT

被引：40

作者：

Garcia, Patricia Salomao ^{[1
]}

Eiras Grossmann, Maria Victoria ^{[1
]}

Yamashita, Fabio ^{[1
]}

Mali, Suzana ^{[2
]}

Dall'Antonia, Luiz Henrique ^{[3
]}

Barreto, Wagner Jose ^{[3
]}

机构：

[1] Univ Estadual Londrina, Dept Ciencia & Tecnol Alimentos, BR-86051970 Londrina, PR, Brazil

[2] Univ Estadual Londrina, Dept Bioquim, BR-86051970 Londrina, PR, Brazil

[3] Univ Estadual Londrina, Dept Quim, BR-86051970 Londrina, PR, Brazil

来源：

QUIMICA NOVA | 2011年 / 34卷 / 09期

关键词：

starch; polyester; compatibilization; THERMOPLASTIC STARCH; GLYCEROL;

D O I：

10.1590/S0100-40422011000900005

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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 12.73x10(-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.

引用

页码：1507 / U366

页数：6

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