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首页> 外文期刊>Journal of Applied Polymer Science >Effect of adding a reactive plasticizer on the mechanical, thermal, and morphology properties of nylon toughened wheat gluten materials
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Effect of adding a reactive plasticizer on the mechanical, thermal, and morphology properties of nylon toughened wheat gluten materials

机译：添加反应增塑剂对尼龙增韧小麦麸质材料的机械，热和形态特性的影响

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Blends of wheat gluten (WG) with up to 30% aliphatic nylon were prepared by mixing in 70% aqueous ethanol solution at 110 degrees C in a sealed reactor. After solvent removal and mechanical milling, rigid plaques were compression molded from the powdered blends. The microstructure of the molded plaques was studied via scanning electron microscopy. All compositions showed a phase separated morphology with seemingly poor compatibility between the two components. Up to 10% addition, the nylon was dispersed within the gluten matrix as discrete particles with an average diameter >10 mu m. At higher nylon volume fractions there was evidence for the presence of gluten sub-inclusions within the nylon phases. The dispersion of particles in a blend containing 10% nylon was improved and the particle size was decreased to roughly 5 mu m by addition of an epoxy functionalized ethylene glycol oligomer. The additive simultaneously lowered the modulus of the WG matrix and appeared to improve the interfacial bonding between the gluten and the nylon. In cross-sections of the ternary blends, fine filaments were observed spanning the gluten/nylon phases at the phase boundary. The compression molded plaques continued to exhibit brittle failure in mechanical bending tests characteristic of glassy gluten materials, however, the mechanical toughness was boosted to almost three times that of reference gluten plaques by the combined addition of the nylon and reactive plasticizer. (C) 2017 Wiley Periodicals, Inc.
机译：通过在110℃的密封反应器中在110℃下在110℃下在110℃下在110℃下在110℃下混合来制备小麦麸质（WG）的混合物。在溶剂去除和机械研磨后，刚性斑块从粉末混合物中压制。通过扫描电子显微镜研究模塑斑块的微观结构。所有组合物均显示相分离的形态，两种组分之间的相容性看似差。添加至10％，尼龙作为平均直径>10μm的离散颗粒分散在麸质基质内。在较高的尼龙体积级分，有证据证明尼龙相中含有麸质亚夹杂物。通过加入环氧官能化乙二醇低聚体，改善了含有10％尼龙的共混物中的颗粒在含有10％尼龙的共混物中的分散，粒度降低至大约5μm。添加剂同时降低了WG基质的模量，似乎改善了粘蛋白和尼龙之间的界面键合。在三元共混物的横截面中，观察到在相边界处的谷蛋白/尼龙相的细丝。压缩模塑斑块继续表现出玻璃筋材料的机械弯曲试验中的脆性失效，然而，通过组合加入尼龙和反应增塑剂来升高机械韧性几乎三倍的参考蛋白质斑块。 （c）2017 Wiley期刊，Inc。

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