López-de-Dicastillo Carol, López-Carballo Gracia, Vázquez Pedro, Schwager Florian, Aragón-Gutiérrez Alejandro, Alonso José M, Hernández-Muñoz Pilar, Gavara Rafael
Packaging Group, Institute of Agrochemistry and Food Technology IATA-CSIC, Av. Agustín Escardino 7, 46980 Paterna, Spain.
Evonik Operations GmbH, Germany.
Polymers (Basel). 2023 Sep 27;15(19):3899. doi: 10.3390/polym15193899.
Oxygen scavengers are valuable active packaging systems because several types of food deterioration processes are initiated by oxygen. Although the incorporation of oxygen scavenger agents into the polymeric matrices has been the trend in recent years, the release of volatile organic compounds (VOC) as a result of the reaction between oxygen and oxygen scavenger substances is an issue to take into account. This is the case of an oxygen scavenger based on a trans-polyoctenamer rubber (TOR). In this work, the design of an oxygen scavenger multilayer system was carried out considering the selection of appropriate adsorbents of VOCs to the proposed layer structure. Firstly, the retention of some representative organic compounds by several adsorbent substances, such as zeolites, silicas, cyclodextrins and polymers, was studied in order to select those with the best performances. A hydrophilic silica and an odor-adsorbing agent based on zinc ricinoleate were the selected adsorbing agents. The principal VOCs released from TOR-containing films were carefully identified, and their retention first by the pure adsorbents, and then by polyethylene incorporated with the selected compounds was quantified. Detected concentrations decreased by 10- to 100-fold, depending on the VOC.
氧气清除剂是很有价值的活性包装系统，因为几种食品变质过程都是由氧气引发的。尽管近年来将氧气清除剂加入聚合物基质已成为一种趋势，但氧气与氧气清除剂物质反应导致挥发性有机化合物（VOC）释放仍是一个需要考虑的问题。基于反式聚辛烯橡胶（TOR）的氧气清除剂就是这种情况。在这项工作中，考虑到为所提议的层结构选择合适的挥发性有机化合物吸附剂，设计了一种氧气清除剂多层系统。首先，研究了几种吸附剂物质（如沸石、二氧化硅、环糊精和聚合物）对一些代表性有机化合物的保留情况，以便选择性能最佳的吸附剂。一种亲水性二氧化硅和一种基于蓖麻油酸锌的气味吸附剂被选为吸附剂。仔细鉴定了含TOR薄膜释放的主要挥发性有机化合物，并对其首先由纯吸附剂、然后由掺入所选化合物的聚乙烯进行的保留情况进行了量化。检测到的浓度根据挥发性有机化合物的不同降低了10至100倍。
