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首页> 美国卫生研究院文献>Nanomaterials >Electrospun Poly(ethylene-co-vinyl alcohol)/Graphene Nanoplatelets Composites of Interest in Intelligent Food Packaging Applications
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Electrospun Poly(ethylene-co-vinyl alcohol)/Graphene Nanoplatelets Composites of Interest in Intelligent Food Packaging Applications

机译：电纺聚（乙烯-共-乙烯醇）/石墨烯纳米片复合材料在智能食品包装中的应用

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Graphene nanoplatelets (GNPs) were synthetized from graphite powder and, thereafter, embedded in poly(ethylene-co-vinyl alcohol) (EVOH) fibers by electrospinning in the 0.1–2 wt.-% range. The morphological, chemical, and thermal characterization performed on the electrospun nanocomposite fibers mats revealed that the GNPs were efficiently dispersed and rolled along the EVOH fibrilar matrix up to contents of 0.5 wt.-%. Additionally, the dielectric behavior of the nanocomposite fibers was evaluated as a function of the frequency range and GNPs content. The obtained results indicated that their dielectric constant rapidly decreased with the frequency increase and only increased at low GNPs loadings while the nanocomposite fiber mats became electrically conductive, with the maximum at 0.5 wt.-% GNPs content. Finally, the electrospun mats were subjected to a thermal post-treatment and dark films with a high contact transparency were obtained, suggesting that the nanocomposites can be used either in a nonwoven fibers form or in a continuous film form. This study demonstrates the potential of electrospinning as a promising technology to produce GNPs-containing materials with high electrical conductivity that can be of potential interest in intelligent packaging applications as “smart” labels or tags.
机译：石墨烯纳米片（GNP）是由石墨粉末合成的，然后通过电纺成0.1–2 wt .-％的范围包埋在聚（乙烯-共-乙烯醇）（EVOH）纤维中。在电纺纳米复合纤维垫上进行的形态，化学和热表征表明，GNP被有效地分散并沿着EVOH纤维状基质滚动直至含量达到0.5 wt .-％。另外，根据频率范围和GNP含量评估纳米复合纤维的介电性能。获得的结果表明，它们的介电常数随着频率的增加而迅速降低，并且仅在低GNPs负载下才增加，而纳米复合纤维垫变成导电的，其最大含量为0.5wt .-％GNPs。最后，对电纺垫进行热后处理，并获得具有高接触透明性的深色薄膜，这表明纳米复合材料可以非织造纤维形式或连续薄膜形式使用。这项研究证明了静电纺丝技术作为生产具有高电导率的含GNPs的材料的有前途的技术的潜力，在智能包装应用中作为“智能”标签或标签可能引起人们的兴趣。

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