Synthetic metal chelators (for example, ethylenediaminetetraacetic acid, EDTA) are widely used as additives to control trace transition metal induced oxidation in consumer products. To enable removal of synthetic chelators in response to increasing consumer demand for clean label products, metal-chelating active food packaging technologies have been developed with demonstrated antioxidant efficacy in simulated food systems. However, prior work in fabrication of metal-chelating materials leveraged batch chemical reactions to tether metal-chelating ligands, a process with limited industrial translatability for large-scale fabrication. To improve the industrial translatability, we have designed a 2-step laminated photo-grafting process to introduce metal chelating functionality onto common polymeric packaging materials. Iminodiacetic acid (IDA) functionalized materials were fabricated by photo-grafting poly(acrylic acid) onto polypropylene (PP) films, followed by a second photo-grafting process to graft-polymerize an IDA functionalized vinyl monomer (GMA-IDA). The photo-grafting was conducted under atmospheric conditions and was completed in 2 min. The resulting IDA functionalized metal-chelating material was able to chelate iron and copper, and showed antioxidant efficacy against ascorbic acid degradation, supporting its potential to be used synergistically with natural antioxidants for preservation of food and beverage products. The 2-step photo-grafting process improves the throughput of active packaging coatings, enabling potential roll-to-roll fabrication of metal-chelating active packaging materials for antioxidant food packaging applications. PRACTICAL APPLICATION To address consumer and retail demands for "clean label" foods and beverages without a corresponding loss in product quality and shelf life, producers are seeking next generation technologies such as active packaging. In this work, we will report the synthesis of metal-chelating active packaging films, which enable removal of the synthetic additive, ethylenediamine tetraacetic acid. The new synthesis technique improves the throughput of metal-chelating active packaging coatings, enabling potential roll-to-roll fabrication of the materials for antioxidant food packaging applications.

中文翻译：

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光固化金属螯合涂料为生产抗氧化活性包装提供了一种可扩展的方法

合成金属螯合剂（例如，乙二胺四乙酸，EDTA）被广泛用作控制消费品中痕量过渡金属诱导氧化的添加剂。为了满足消费者对清洁标签产品日益增长的需求，去除合成螯合剂，已开发出金属螯合活性食品包装技术，在模拟食品系统中具有抗氧化功效。然而，金属螯合材料的先前制造工作利用批量化学反应来束缚金属螯合配体，这种工艺在大规模制造中的工业可转化性有限。为了提高工业可翻译性，我们设计了一种两步层压光接枝工艺，将金属螯合功能引入到常见的聚合物包装材料上。亚氨基二乙酸 (IDA) 功能化材料是通过将聚（丙烯酸）光接枝到聚丙烯 (PP) 薄膜上，然后进行第二次光接枝工艺以接枝聚合 IDA 功能化乙烯基单体 (GMA-IDA) 来制造的。光接枝在大气条件下进行，并在 2 分钟内完成。得到的 IDA 功能化金属螯合材料能够螯合铁和铜，并显示出抗坏血酸降解的抗氧化功效，支持其与天然抗氧化剂协同用于食品和饮料产品防腐的潜力。两步光接枝工艺提高了活性包装涂料的生产量，从而为抗氧化食品包装应用的金属螯合活性包装材料的卷对卷制造提供了可能。实际应用 为了满足消费者和零售对“清洁标签”食品和饮料的需求，同时又不影响产品质量和保质期，生产商正在寻求下一代技术，例如活性包装。在这项工作中，我们将报告金属螯合活性包装薄膜的合成，该薄膜能够去除合成添加剂乙二胺四乙酸。新的合成技术提高了金属螯合活性包装涂料的生产量，使抗氧化食品包装应用材料的潜在卷对卷制造成为可能。在这项工作中，我们将报告金属螯合活性包装薄膜的合成，该薄膜能够去除合成添加剂乙二胺四乙酸。新的合成技术提高了金属螯合活性包装涂料的生产量，使抗氧化食品包装应用材料的潜在卷对卷制造成为可能。在这项工作中，我们将报告金属螯合活性包装薄膜的合成，该薄膜能够去除合成添加剂乙二胺四乙酸。新的合成技术提高了金属螯合活性包装涂料的生产量，使抗氧化食品包装应用材料的潜在卷对卷制造成为可能。