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首页> 外文期刊>Journal of Applied Polymer Science >Surface properties, thermal, and mechanical characteristics of poly(vinyl alcohol)-starch-bacterial cellulose composite films
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Surface properties, thermal, and mechanical characteristics of poly(vinyl alcohol)-starch-bacterial cellulose composite films

机译：聚（乙烯醇）-Starch-细菌纤维素复合膜的表面性质，热和机械特性

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摘要

Nanocomposite films for food packaging applications were developed using bacterial cellulose (BC) nanofibers in different amount in a poly(vinyl alcohol)/starch (PVA/St) matrix. In search of a better method to reduce the harmful ingredients in food packaging, the cellulose nanofibers were obtained by the mechanical defibrillation of BC pellicles thus avoiding the addition of chemicals in the final packaging material. Improved mechanical performances were obtained starting from just 1% BC nanofibers in PVA/St. Atomic force microscopy images showed a uniform dispersion of BC nanofibers on the surface of nanocomposites. A twofold increase of both tensile strength and modulus was obtained for 2 wt % BC in the composite. BC nanofibers have greatly improved the barrier properties of PVA/St matrix, a twofold increase of water vapor permeability being obtained for only 2 wt % BC nanofibers in the composite film. PVA/St/2BC was proposed as a high potential material for food packaging applications. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45800.
机译：用于食品包装应用的纳米复合薄膜使用聚（乙烯醇）/淀粉（PVA / ST）基质中不同量的细菌纤维素（BC）纳米纤维进行。为了在食品包装中减少有害成分的更好方法，通过BC颗粒的机械除颤获得纤维素纳米纤维，从而避免在最终包装材料中添加化学品。从PVA / ST中的仅1％BC纳米纤维获得改善的机械性能。原子力显微镜图像显示BC纳米纤维在纳米复合材料表面上的均匀分散。在复合材料中获得2wt％Bc的拉伸强度和模量的两倍增加。 BC纳米纤维大大提高了PVA / ST基质的阻隔性，在复合膜中仅获得了仅2重量％BC纳米纤维的水蒸气渗透性的两倍。 PVA / ST / 2BC被提出为食品包装应用的高潜在材料。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,45800。

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