a IUT Dijon-Auxerre , Dpt Bio Engineering , BP 17867, F-21078, Dijon , France.
b Univ. Bourgogne Franche-Comté, AgroSup Dijon , PAM UMR A02.102. F-21000 Dijon , France.
Crit Rev Food Sci Nutr. 2019;59(7):1137-1153. doi: 10.1080/10408398.2017.1393384. Epub 2017 Nov 6.
Nowadays, a new generation of edible films is being especially designed for incorporating antimicrobials, antioxidants, enzymes or functional ingredients. Edible films made from natural biopolymers become the focus of many research works as an alternative to synthetic food packaging due to their edibility, biodegradability and compostability as well as to their use as active packaging. Active compounds incorporated in edible films could protect foods against deterioration during storage and therefore extend their shelf life. These active films were mainly studied for the bioactivity, as antimicrobial or antioxidant. However, they could also improve the structure and the physicochemical properties of films through chemical linkage with reactive groups of the polymer chains for instance. Moreover, changing the film structure under cross-linking reaction may increase the cohesion between polymer chains and active compounds, and therefore their retention in the polymer network to better control their release. This manuscript provides an overview on the effect of bio-active compounds incorporation on the film structure and functional properties. Depending on their structure, concentration, reactive groups,.., active compounds can act as plasticizer, but also as anti-plasticizer or cross-linking agents in the biopolymer matrix, and can thus ameliorate the water vapour and gas permeability. Therefore, the retention of bioactive compounds in the polymer network and their release can be better controlled. They can also provide a negative plasticizing effect on the film structure. Hence, the improvement of edible active film functionalities has been investigated to achieve suitable applications on foods.
如今,新一代的可食用薄膜正在被特别设计用于添加抗菌剂、抗氧化剂、酶或功能性成分。由于天然生物聚合物制成的可食用薄膜具有可食用性、生物降解性和可堆肥性,以及作为活性包装的用途,因此它们成为许多研究工作的焦点,作为合成食品包装的替代品。可食用薄膜中添加的活性化合物可以保护食品在储存过程中不受变质,从而延长其保质期。这些活性薄膜主要作为抗菌剂或抗氧化剂来研究其生物活性。然而,它们还可以通过与聚合物链的反应性基团进行化学交联来改善薄膜的结构和物理化学性质。此外,通过交联反应改变薄膜结构可以增加聚合物链和活性化合物之间的内聚力,从而提高它们在聚合物网络中的保留率,以更好地控制其释放。本文概述了生物活性化合物的添加对薄膜结构和功能特性的影响。根据其结构、浓度、反应性基团等,活性化合物可以作为增塑剂,也可以作为生物聚合物基质中的抗塑化剂或交联剂,从而改善水蒸气和气体的渗透性。因此,可以更好地控制生物活性化合物在聚合物网络中的保留率及其释放。它们还可以对薄膜结构产生负的塑化作用。因此,人们研究了可食用活性薄膜的功能改进,以实现其在食品上的适宜应用。
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