Effects of the incorporation of saturated fatty acids on the mechanical and barrier properties of biodegradable films

被引：27

作者：

Nobrega, Marcelo Medre ^{[1
]}

Olivato, Juliana Bonametti ^{[1
]}

Eiras Grossmann, Maria Victoria ^{[1
]}

Bona, Evandro ^{[2
]}

Yamashita, Fabio ^{[1
]}

机构：

[1] Univ Estadual Londrina, Dept Food Sci & Technol, BR-86051990 Londrina, PR, Brazil

[2] Fed Univ Technol, Postgrad Program Food Technol PPGTA, Parana UTFPR, BR-87301006 Campo Mourao, PR, Brazil

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2012年 / 124卷 / 05期

关键词：

fatty acids; biodegradable films; mechanical and barrier properties; CASSAVA STARCH FILMS; THERMOPLASTIC STARCH; TERNARY BLENDS; BINARY;

D O I：

10.1002/app.35250

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The effects of saturated fatty acids at a concentration of 1.5% on the mechanical and barrier properties of starch-based films were evaluated in films prepared with two concentrations of glycerol, 20 and 25%. The water vapor permeability (WVP) was determined at three ranges of relative humidity, RH, (033, 3364 and 6497%). In all cases, an increase in WVP values was observed with increasing RH. SEM images showed a more homogeneous and compact structure in the films with caproic and lauric acids. The films with fatty acids showed higher elongation and maximum stress, and they had Young's modulus values close to those of the control; thus, the addition of fatty acids did not impair the mechanical properties. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

引用

页码：3695 / 3703

页数：9

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