Joohoon Kim, Hongyoon Kim, Hyunjung Kang, Wonjoong Kim, Yi Chen, Jonghyun Choi, Heon Lee, Junsuk Rho
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引用次数: 0
摘要
可持续性、湿度感应和产品来源是食品包装的重要特征。标签和包装产生的废弃物会破坏环境,湿度会导致食品在运送过程中变质,而容易伪造的标签则会损害消费者的信任。在此,我们介绍一种基于高折射率水溶性纳米复合油墨的食品标签,以解决这些问题。通过使用纳米压印光刻技术对纳米复合油墨进行图案化处理,最终得到的元表面呈现出鲜艳明亮的结构色彩。这种方法可以快速、低成本地在大型表面上制作图案。此外,还开发了一种 QR 码,可以提供食品的最新信息。隐藏在 QR 码中的微打印技术可防止伪造,无法物理剥离或复制,并可用作湿度指示器。我们提出的食品标签既能减少浪费,又能确保客户获得准确的产品信息。
A water-soluble label for food products prevents packaging waste and counterfeiting
Sustainability, humidity sensing and product origin are important features of food packaging. While waste generated from labelling and packaging causes environmental destruction, humidity can result in food spoilage during delivery and counterfeit-prone labelling undermines consumer trust. Here we introduce a food label based on a water-soluble nanocomposite ink with a high refractive index that addresses these issues. By patterning the nanocomposite ink using nanoimprint lithography, the resultant metasurface shows bright and vivid structural colours. This method makes it possible to quickly and inexpensively create patterns on large surfaces. A QR code is also developed that can provide up-to-date information on food products. Microprinting hidden in the QR code protects against counterfeiting, cannot be physically detached or replicated and may be used as a humidity indicator. Our proposed food label can reduce waste while ensuring customers receive accurate product information. Food packaging is an important environmental concern and susceptible to counterfeit-prone labelling. This study presents a newly developed water-soluble food label using nanocomposite ink that addresses these issues.