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首页> 外文期刊>Journal of Applied Polymer Science >Influence of plasticizers on the mechanical and barrier properties of cast biopolymer films
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Influence of plasticizers on the mechanical and barrier properties of cast biopolymer films

机译：增塑剂对流延生物聚合物薄膜的机械性能和阻隔性能的影响

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The potential of biopolymers for packaging application is often limited due to their poor processability. In this study, the effect of commonly used plasticizers on the properties of different cast biopolymer films is investigated. This enables a valuation of the potential of different biopolymers as packaging materials and an estimation of the effectiveness of plasticizers for certain biopolymer systems. Polysaccharides (corn starch and alginate) and plant proteins (wheat gluten and pea protein) were tested as film materials. To improve the processability by decreasing the brittleness of these cast biopolymer films, glycerol (Gly), sorbitol (Sor), and triethanolamine (TEA) were added as plasticizers. The structural, mechanical, and barrier properties to water vapor and oxygen were characterized in order to study the effectiveness of the plasticizers and their respective influence on the film properties. The mechanical results show there was a plasticizing effect with all the plasticizers, but the influence on the barrier properties depends on the specific plasticizer: While glycerol (Gly) leads to an increase in water vapor and oxygen permeability (OP), Sor leads to almost constant, and TEA even to decreased OP of the biopolymer films. Therefore, careful selection of the plasticizer allows biopolymer films with improved processability and high or low permeabilities to be manufactured. (C) 2015 Wiley Periodicals, Inc.
机译：由于生物聚合物的可加工性差，其包装应用的潜力通常受到限制。在这项研究中，研究了常用增塑剂对不同流延生物聚合物薄膜性能的影响。这使得能够评估不同生物聚合物作为包装材料的潜力，并能估计增塑剂对某些生物聚合物系统的有效性。测试了多糖（玉米淀粉和藻酸盐）和植物蛋白（小麦面筋和豌豆蛋白）作为薄膜材料。为了通过降低这些流延的生物聚合物薄膜的脆性来提高可加工性，添加了甘油（Gly），山梨糖醇（Sor）和三乙醇胺（TEA）作为增塑剂。对水蒸气和氧气的结构，机械和阻隔性能进行了表征，以研究增塑剂的有效性及其各自对薄膜性能的影响。力学结果表明，所有增塑剂都有增塑作用，但对阻隔性能的影响取决于特定的增塑剂：甘油（Gly）导致水蒸气和氧气渗透率（OP）增加，Sor导致几乎常数，甚至TEA甚至可以降低生物聚合物薄膜的OP。因此，仔细选择增塑剂可以制造出具有改善的可加工性和高或低渗透性的生物聚合物膜。 （C）2015年Wiley Periodicals，Inc.

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