Abdullah Johar Amin Ahmed, Jiménez-Rosado Mercedes, Benítez José J, Guerrero Antonio, Romero Alberto
Departamento de Ingeniería Química, Escuela Politécnica Superior, Universidad de Sevilla, 41011 Sevilla, Spain.
Instituto de Ciencia de Materiales de Sevilla, Centro Mixto CSIC-Universidad de Sevilla, Calle Américo Vespucio 49, Isla de la Cartuja, 41092 Sevilla, Spain.
Polymers (Basel). 2022 Oct 23;14(21):4487. doi: 10.3390/polym14214487.
Nowadays, natural polymer-based films are considered potentially environmentally friendly alternatives to conventional plastic films, due to many advantageous properties, including their easy processability, high flexibility, non-toxicity, low cost, high availability, and environmental safety. However, they are limited in their application by a number of shortcomings, including their high water solubility and vapor permeability as well as their poor opacity and low mechanical resistance. Thus, nanoparticles, such as green FeO-NPs, can be used to overcome the drawbacks associated with these materials. Therefore, the aim of this study was to develop three different polymer-based films (gelatin-based, cellulose acetate-based and chitosan-based films) containing green synthesized FeO-NPs (1.0% w/w of the initial polymer weight) as an additive to improve film properties. This was accomplished by preparing the different films using the casting method and examining their physicochemical, mechanical, microstructural, and functional characteristics. The results show that the incorporation of FeO-NPs into the different films significantly enhanced their physicochemical, mechanical, and morphological properties as well as their antioxidant characteristics. Consequently, it was possible to produce suitable natural polymer-based films with potential applications across a wide range of industries, including functional packaging for food, antioxidants, and antimicrobial additives for pharmaceutical and biomedical materials as well as pesticides for agriculture.
如今，基于天然聚合物的薄膜由于具有许多优点，如易于加工、高柔韧性、无毒、低成本、高可用性和环境安全性等，被认为是传统塑料薄膜潜在的环保替代品。然而，它们在应用中受到一些缺点的限制，包括高水溶性、高水蒸气透过率以及差的不透明度和低机械抗性。因此，纳米颗粒，如绿色FeO-NPs，可用于克服与这些材料相关的缺点。因此，本研究的目的是开发三种不同的基于聚合物的薄膜（明胶基、醋酸纤维素基和壳聚糖基薄膜），其中含有绿色合成的FeO-NPs（占初始聚合物重量的1.0% w/w）作为添加剂，以改善薄膜性能。这是通过使用流延法制备不同的薄膜并检查其物理化学、机械、微观结构和功能特性来实现的。结果表明，将FeO-NPs掺入不同的薄膜中显著提高了它们的物理化学、机械和形态学性能以及抗氧化特性。因此，有可能生产出适用于广泛行业的天然聚合物基薄膜，包括食品功能包装、抗氧化剂、医药和生物医学材料的抗菌添加剂以及农业用农药。
