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Development of Palladium-based Oxygen Scavenger: Optimization of Substrate and Palladium Layer Thickness

机译:钯基除氧剂的开发:基材和钯层厚度的优化

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摘要

Oxygen scavenging films based on vacuum deposited palladium layers were developed to remove residual oxygen remaining in food packages after modified atmosphere packaging. Palladium (Pd) was coated on to a range of packaging films and in different thicknesses using magnetron sputtering technology. To improve the substrate surface, an additional silicon oxide (SiOx) layer was also applied to the films before Pd deposition. To determine the oxygen scavenging activity, the scavenger films were placed into an airtight cell, which was flushed with a gas mixture containing 2vol.% oxygen and 5vol.% hydrogen. The results showed that the oxygen scavenging rate was strongly dependent on the coating substrate as well as on the Pd deposition thickness. Packaging films such as polyethylene terephthalate, aluminium oxide-coated polyethylene terephthalate, oriented polypropylene and polylactic acid were found to be the most suitable substrates for Pd-based oxygen scavengers. Moreover, it was demonstrated that the intermediate SiOx layer between the substrate and the Pd layer led to a substantial increase in the oxygen scavenging activity rate (up to 33-fold) for all applied packaging films. Additionally, it was shown that the optimal Pd layer thickness for the investigated oxygen scavenging films lies between 0.7 and 3.4nm. The resulting scavenger films have the potential to scavenge residual headspace oxygen of sensitive foods within a matter of minutes leading to shelf life extension and overall quality improvements. Copyright (c) 2015 John Wiley & Sons, Ltd.
机译:开发了基于真空沉积的钯层的除氧膜,以去除经过修饰的气氛包装后食品包装中残留的残留氧气。使用磁控溅射技术将钯(Pd)涂覆到一系列包装膜上,并具有不同的厚度。为了改善衬底表面,在沉积Pd之前,还向膜上添加了一层氧化硅(SiOx)层。为了确定除氧活性,将清除剂膜放入气密的小室中,该小室用含2vol。%的氧气和5vol。%的氢气的气体混合物冲洗。结果表明,除氧速率在很大程度上取决于涂层基材以及Pd的沉积厚度。发现诸如聚对苯二甲酸乙二酯,氧化铝涂覆的聚对苯二甲酸乙二酯,取向聚丙烯和聚乳酸的包装膜是用于基于Pd的除氧剂的最合适的基材。此外,已证明,在基材和Pd层之间的中间SiOx层导致所有涂覆的包装膜的除氧活性速率大大提高(最高33倍)。此外,还表明,所研究的除氧膜的最佳Pd层厚度在0.7至3.4nm之间。所得的清除剂薄膜有可能在几分钟之内清除敏感食品的残留顶空氧气,从而延长了货架期并改善了整体质量。版权所有(c)2015 John Wiley&Sons,Ltd.

著录项

  • 来源
    《Packaging Technology and Science》 |2015年第8期|710-718|共9页
  • 作者单位

    Zurich Univ Appl Sci, Life Sci & Facil Management, CH-8820 Wadenswil, Switzerland;

    Zurich Univ Appl Sci, Life Sci & Facil Management, CH-8820 Wadenswil, Switzerland;

    Zurich Univ Appl Sci, Life Sci & Facil Management, CH-8820 Wadenswil, Switzerland;

    Amcor Flexibles Kreuzlingen AG, CH-8280 Kreuzlingen, Switzerland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    active packaging; oxygen scavengers; palladium;

    机译:活性包装;除氧剂;钯;
  • 入库时间 2022-08-17 13:27:26

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