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首页> 外文期刊>Journal of Polymers and the Environment >Properties of Wheat-Gluten/Montmorillonite Nanocomposite Films Obtained by a Solvent-Free Extrusion Process
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Properties of Wheat-Gluten/Montmorillonite Nanocomposite Films Obtained by a Solvent-Free Extrusion Process

机译：无溶剂挤出法制备的小麦-谷蛋白/蒙脱土纳米复合薄膜的性能

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摘要

This is, to our knowledge, the first study of wheat-gluten-based nanocomposite films prepared by a solvent-free extrusion process. Wheat gluten/montmoril-lonite nanocomposite films were obtained in a single screw-extruder using urea as a combined denaturant and plasticizer. The oxygen permeability and water vapor transmission rate of the films decreased by respectively factors of 1.9 and 1.3 when 5 wt.% clay was added. At the same time, the stiffness increased by a factor of 1.5, without any critical loss of extensibility. Field emission scanning electron microscopy (FE-SEM) and Energy-dispersive X-ray analysis indicated that the clay particles were layered mainly in the plane of the extruded film. It was possible to identify individual platelets/tactoids with FE-SEM and, together with findings from transmission electron microscopy, atomic force microscopy and X-ray diffraction, it was concluded that the clay existed as individual clay platelets, intercalated tactoids and agglomerates. Thermogravimetric analysis showed that the thermal stability of the extrudates was improved by the addition of clay.
机译：据我们所知，这是通过无溶剂挤出工艺制备的基于小麦面筋的纳米复合薄膜的首次研究。使用尿素作为变性剂和增塑剂的组合，在单螺杆挤出机中获得了小麦面筋/蒙脱土-朗尼特纳米复合材料薄膜。当添加5重量％的粘土时，膜的透氧性和水蒸气透过率分别降低了1.9和1.3倍。同时，刚度增加了1.5倍，而没有任何严重的延展性损失。场发射扫描电子显微镜（FE-SEM）和能量色散X射线分析表明，粘土颗粒主要在挤出膜的平面内分层。可以用FE-SEM鉴定单个的血小板/类固醇，并结合透射电子显微镜，原子力显微镜和X射线衍射的发现，得出的结论是，粘土以单个的粘土片状，插层式触塑料和团聚体形式存在。热重分析表明，通过添加粘土可以改善挤出物的热稳定性。

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