Wang Yun, Zhong Jiaqi, McClements David Julian, Zhang Zipei, Zhang Ruojie, Jin Zhengyu, Chen Long
School of Food Science and Technology, Jiangnan University, Wuxi, China.
Department of Food Science, University of Massachusetts, Amherst, Massachusetts, USA.
Crit Rev Food Sci Nutr. 2024 Dec 9:1-16. doi: 10.1080/10408398.2024.2437570.
Intelligent packaging (also called smart packaging) has garnered significant attention for its ability to monitor food quality and spoilage during storage, without compromising packaging integrity. Natural pigments are being explored as sensors of food properties in these applications, but they are often chemically unstable, which limits their widespread utilization for this purpose. Therefore, enhancing pigment stability is imperative. This review article discusses the different types of natural pigments used in intelligent packaging applications. It then highlights the origin of their chemical instability and the factors that impact it, before outlining potential strategies to improve their stability. Natural pigments used in intelligent packaging include phenolic-, quinone-, pyrrole-, polyene- and betalain-based molecules, which are characterized by their unique chemical structures, especially the presence of conjugated structures that selectively absorb visible light. The environmental conditions that trigger a color-change in each pigment are highlighted. Pigment stability can be enhanced through a variety of approaches, including molecular modifications, pigment encapsulation, and label matrix design. These approaches modify the microenvironment of the pigments, thereby increasing their stability. These pigment enhancement methods hold promise for the development of intelligent packaging materials that can be used in the food and other industries.
智能包装（也称为智能包装）因其在不损害包装完整性的情况下监测食品储存期间的质量和变质情况的能力而备受关注。在这些应用中，天然色素正被探索用作食品特性的传感器，但它们通常化学性质不稳定，这限制了它们在此目的上的广泛应用。因此，提高色素稳定性势在必行。这篇综述文章讨论了智能包装应用中使用的不同类型的天然色素。然后，在概述提高其稳定性的潜在策略之前，强调了它们化学不稳定性的根源以及影响其的因素。智能包装中使用的天然色素包括基于酚类、醌类、吡咯类、多烯类和甜菜碱类的分子，它们的特点是具有独特的化学结构，特别是存在选择性吸收可见光的共轭结构。文中突出了每种色素发生颜色变化的环境条件。色素稳定性可以通过多种方法提高，包括分子修饰、色素封装和标签基质设计。这些方法改变了色素的微环境，从而提高了它们的稳定性。这些色素增强方法有望用于开发可在食品和其他行业中使用的智能包装材料。
