Influence of citric acid on thermoplastic wheat flour/poly(lactic acid) blends. II. Barrier properties and water vapor sorption isotherms

被引：60

作者：

Abdillahi, H. ^{[1
,2
]}

Chabrat, E. ^{[1
,2
]}

Rouilly, A. ^{[1
,2
]}

Rigal, L. ^{[1
,2
]}

机构：

[1] Univ Toulouse, INPT, ENSIACET, LCA, F-31030 Toulouse 4, France

[2] INRA, LCA, Paris, France

来源：

INDUSTRIAL CROPS AND PRODUCTS | 2013年 / 50卷

关键词：

Citric acid; Starch; Wheat flour; Poly(lactic acid); Extrusion; Barrier properties; Sorption isotherms; CASSAVA STARCH FILMS; MECHANICAL-PROPERTIES; POLY(LACTIC ACID); PHYSICAL-PROPERTIES; BIOBASED MATERIALS; EDIBLE FILMS; PERMEABILITY; COMPOSITES; GLYCEROL; GLUTEN;

D O I：

10.1016/j.indcrop.2013.06.028

中图分类号：

S2 [农业工程];

学科分类号：

082806 [农业信息与电气工程];

摘要：

The effects of citric acid on wheat flour/glycerol/poly(lactic) acid (PLA) blends prepared by one-step twin-screw extrusion have been studied to improve barrier properties of starch based materials. A series of injected samples were produced from prepared compounds with varying ratio (0-20 part) of citric acid. The effects of citric acid on the water vapor permeability, oxygen permeability and water solubility in the film were then investigated. The barrier properties results proved that citric acid behaves as compatibilizing agent between starch and PLA phases for ratios between 0 and 10 parts. When the added amount exceeds 10 parts, CA acted as a plasticizer and/or promoted the hydrolysis of the starch glycosidic bonds. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：104 / 111

页数：8

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