High-elongation zein films for flexible packaging by synergistic plasticization: Preparation, structure and properties
High-elongation zein films for flexible packaging by synergistic plasticization: Preparation, structure and properties
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用于软包装的协同塑化高伸长玉米蛋白薄膜：制备、结构和性能
DOI：
10.1016/j.jcs.2017.11.021
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发表时间：
2018-01-01
影响因子：
3.8
通讯作者：
Jiang, Yanbin
中科院分区：
文献类型：
--
作者：
Huo, Weizhi;Wei, Dongwei;Jiang, Yanbin
为了获得高伸长率的软包装，选择甘油（GLY）和一系列聚醚（PEs），即聚乙二醇（PEG）、聚丙二醇（PPG）、聚四甲基乙二醇（PTMG）作为模型增塑剂来软化玉米蛋白薄膜。采用不同的表征方法对薄膜的结构和性能进行了详细的研究。结果表明，当使用合适的GLY和pe的质量比为1:1时，在0.45 g增塑剂/g玉米蛋白时，增塑剂/g玉米蛋白的断裂伸长率为245-350%。讨论了玉米蛋白对薄膜的增效增效作用，认为增效增效作用是由于玉米蛋白分子结构的改变，即α -螺旋间填料的破坏和β -片含量的增加，并提出了增效增效机理。GLY和PTMG塑化膜由于其独特的多孔结构，具有较高的透气性。所有玉米蛋白膜均表现出优异的紫外线阻隔性能，聚乙二醇提高了玉米蛋白膜的透光率。(C) 2017 Elsevier Ltd.版权所有。
To obtain high-elongation flexible packaging, glycerol (GLY) and a series of polyethers (PEs), i.e. poly (ethylene glycol) (PEG), poly (propylene glycol) (PPG), poly (tetramethylene glycol) (PTMG), were chosen as model plasticizers to soften zein films. Different characterizations were conducted to investigate the structure and properties of films in detail. The results indicated that when using a suitable ratio of GLY and PEs, i.e. 1:1 in mass, the plasticized zein films showed excellent elongation at break of 245-350% at 0.45 g plasticizer/g zein. The synergistic plasticizing effects on films were discussed and attributed to the structural change of zein molecules, i.e. the disruption of inter-alpha-helix packing and the increase of beta-sheet content, then the plasticization mechanism was proposed. Films plasticized by GLY and PTMG had higher water vapor permeability because of their unique porous structure. All zein films exhibited excellent UV barrier properties, and PEG improved the transmittance of zein film. (C) 2017 Elsevier Ltd. All rights reserved.