Wheat straw hemicellulose films as affected by citric acid

被引：94

作者：

Azeredo, Henriette M. C. ^{[1
]}

Kontou-Vrettou, Charis ^{[2
]}

Moates, Graham K. ^{[3
]}

Wellner, Nikolaus ^{[3
]}

Cross, Kathryn ^{[3
]}

Pereira, Paulo H. F. ^{[3
]}

Waldron, Keith W. ^{[3
]}

机构：

[1] Embrapa Secretariat Int Affairs, BR-70770901 Brasilia, DF, Brazil

[2] Agr Univ Athens, GR-11855 Athens, Greece

[3] Inst Food Res, Norwich NR4 7UA, Norfolk, England

来源：

FOOD HYDROCOLLOIDS | 2015年 / 50卷

基金：

英国生物技术与生命科学研究理事会;

关键词：

Food packaging; Polysaccharides; Biopolymers; Biodegradable films; Crosslinking; CROSS-LINKING; PHYSICOCHEMICAL PROPERTIES; BARRIER PROPERTIES; BEHAVIOR; SORPTION; FIBERS; COTTON; WATER;

D O I：

10.1016/j.foodhyd.2015.04.005

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Hemicelluloses have been extracted from wheat straw with an alkaline peroxide solution. Biodegradable films intended for food packaging have been produced from hemicelluloses mixed with glycerol and different concentrations of citric acid (as a crosslinking agent), with or without sodium hypophosphite (catalyst to the crosslinking reaction). A curing treatment at 150 degrees C has been carried out on the dried films in order to promote formation of ester bonds between citric acid and hemicelluloses. The crosslinking reaction, evidenced by FTIR spectra, improved water resistance and water vapor barrier properties of the films. On the other hand, the citric acid effects on film tensile properties were more consistent with those of a plasticizer than of a crosslinker, which might be ascribed to a flexible crosslinking. Sodium hypophosphite (SHP) did not affect the properties of crosslinked films. FTIR spectra indicated that some crosslinking reaction occurred even in a non-cured film. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：1 / 6

页数：6

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