Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece.
Department of Material Sci. & Engineering, University of Ioannina, 45110 Ioannina, Greece.
Molecules. 2021 Mar 13;26(6):1585. doi: 10.3390/molecules26061585.
An innovative process for the adsorption of the hydrophobic Basil-Oil (BO) into the hydrophilic food byproduct chitosan (CS) and the development of an advanced low-density polyethylene/chitosan/basil-oil (LDPE/CS_BO) active packaging film was investigated in this work. The idea of this study was the use of the BO as both a bioactive agent and a compatibilizer. The CS was modified to a CS_BO hydrophobic blend via a green evaporation/adsorption process. This blend was incorporated directly in the LDPE to produce films with advanced properties. All the obtained composite films exhibited improved packaging properties. The film with 10% CS_BO content exhibited the best packaging properties, i.e., 33.0% higher tensile stress, 31.0% higher water barrier, 54.3% higher oxygen barrier, and 12.3% higher antioxidant activity values compared to the corresponding values of the LDPE films. The lipid oxidation values of chicken breast fillets which were packaged under vacuum using this film were measured after seven and after fourteen days of storage. These values were found to be lower by around 41% and 45%, respectively, compared with the corresponding lipid oxidation values of pure LDPE film.
本工作研究了将疏水性罗勒油（BO）通过创新吸附工艺吸附到亲水性食品副产物壳聚糖（CS）中，并开发了先进的低密度聚乙烯/壳聚糖/罗勒油（LDPE/CS_BO）活性包装膜。本研究的思路是将 BO 用作生物活性剂和增容剂。通过绿色蒸发/吸附工艺将 CS 改性为 CS_BO 疏水性共混物。将该共混物直接掺入 LDPE 中，以生产具有先进性能的薄膜。所有获得的复合膜均表现出改善的包装性能。与相应的 LDPE 膜相比，含有 10%CS_BO 的薄膜具有更好的包装性能，即拉伸应力提高了 33.0%，水阻隔性提高了 31.0%，氧气阻隔性提高了 54.3%，抗氧化活性提高了 12.3%。使用该膜真空包装鸡胸肉片后，分别在 7 天和 14 天后测量其脂质氧化值。与纯 LDPE 膜的相应脂质氧化值相比，这些值分别降低了约 41%和 45%。
