Laboratory of Food Process Engineering, Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece.
Packtin, Via Del Chionso, 14/I, 42122, Reggio Emilia, RE, Italy.
Sci Rep. 2024 Jan 4;14(1):517. doi: 10.1038/s41598-024-51163-y.
The rising packaging industry together with global demand for sustainable production has increased the interest in developing biodegradable packaging materials. The aim of the study was to develop edible films based on pectin, gelatin, and hydroxypropyl methylcellulose and evaluate their applicability as biodegradable packaging materials for gilthead seabream fillets. Mechanical properties, water barriers, wettability of the films through contact angle measurement, optical, and UV-Vis barrier properties were evaluated for food packaging applications. The effective blend of polysaccharide and protein film-forming solutions was confirmed by the produced films with excellent optical properties, acceptable mechanical properties and adequate barriers to water vapor. The contact angle for pectin based and gelatin based films were higher than 90° indicating the hydrophobic films, while HPMC based films had contact angle lower than 90°. The produced films were tested as alternative and environmentally friendly packaging materials for gilthead seabream fillets during refrigerated storage. All tested packaging conditions resulted in similar shelf-life in packed gilthead seabream fillets (i.e. 7-8 days at 2 °C). The results showed that the developed films may reduce the use of conventional petroleum-based food packaging materials without affecting the shelf-life of fish.
随着包装行业的兴起以及全球对可持续生产的需求增加，人们对开发可生物降解包装材料的兴趣日益浓厚。本研究旨在开发基于果胶、明胶和羟丙基甲基纤维素的可食用薄膜，并评估其作为金头鲷鱼片可生物降解包装材料的适用性。为了进行食品包装应用，对薄膜的机械性能、水阻隔性、通过接触角测量的润湿性、光学和 UV-Vis 阻隔性能进行了评估。通过生产具有优异光学性能、可接受的机械性能和适当的水蒸气阻隔性的薄膜，证实了多糖和蛋白质成膜溶液的有效共混。基于果胶和明胶的薄膜的接触角高于 90°，表明其为疏水性薄膜，而基于 HPMC 的薄膜的接触角低于 90°。在冷藏储存期间，将所制备的薄膜用作金头鲷鱼片的替代和环保包装材料进行了测试。所有测试的包装条件都使包装好的金头鲷鱼片具有相似的保质期（即在 2°C 下为 7-8 天）。结果表明，所开发的薄膜可减少对传统石油基食品包装材料的使用，而不会影响鱼类的保质期。
