Influence of reducing agents on properties of thermo-molded wheat gluten bioplastics

被引：15
作者：
Min, Zuo [1 ,2 ]
Song, Yihu [1 ,2 ]
Zheng, Qiang [1 ,2 ]
机构：
[1] Zhejiang Univ, Dept Polymer Sci & Engn, Hangzhou 310027, Peoples R China
[2] Zhejiang Univ, Minist Educ, Key Lab Macromol Synth & Functionalizat, Hangzhou 310027, Peoples R China
来源：
JOURNAL OF CEREAL SCIENCE | 2008年 / 48卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Wheat gluten; Bioplastic; Reducing agent; Properties;
D O I：
10.1016/j.jcs.2008.06.003
中图分类号：
TS2 [食品工业];
学科分类号：
0832 ;
摘要：
The present work aims to study the influence of reducing agents of sodium bisulfite, sodium sulfite and thioglycolic acid on the equibiaxial extensional deformation of glycerol plasticized wheat gluten and the properties of gluten bioplastics thermo-molded at 125 degrees C. Moisture absorption, weight loss and water uptake, uniaxial tensile properties (Young's modulus, tensile strength, elongation at break and tensile set), and morphology observations were performed to characterize the physical properties of the thermo-molded gluten bioplastics. The results showed that reducing agents facilitated the viscous flow and restrained the elastic recovery of the plasticized gluten while not hindering the crosslinking reaction of gluten proteins during thermo-molding. On the contrary, reducing agents do not significantly influence moisture absorption, Young's modulus, tensile strength and the morphology of the gluten bioplastics thermo-molded at 125 degrees C. It is shown that reducing agents are highly effective for tailoring the flow viscosity of the plasticized gluten dough and the mechanical properties of thermo-molded gluten bioplastics. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：794 / 799
页数：6
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