State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China.
State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China.
Food Res Int. 2023 Feb;164:112331. doi: 10.1016/j.foodres.2022.112331. Epub 2022 Dec 12.
The widely use of petroleum-based plastics causes serious environmental pollution and oil resource shortage. In this work, biodegradable films were prepared based on gallic acid (GA)-induced Chinese yam starch (YS) and chitosan (CS). The fresh-keeping effect of biodegradable films on the pork meat preservation were investigated. The prepared GA/YS/CS biodegradable films exhibited thinner thickness and better light transmittance, because CS effectively decreased the viscosity of film-forming solution and weaken its internal link structure. The SEM results and mechanical results revealed that the YS, GA, and CS had a good compatibility, GA modification and adding CS markedly improved the tensile strength of YS-based film, because the interaction between CS and starch molecular was facilitate owing to the NH of CS tended to form hydrogen bonds with the hydroxyl group of starch. Sensory analysis results suggested that GA/YS/CS films can effectively improve the quality of pork during storage compared to the package of polyethylene film. In summary, the prepared GA/YS/CS film in this work had practical application potential in pork preservation due to its excellent mechanical, antibacterial, oxidation resistance properties, and the development and application of biodegradable starch film can greatly reduce the increasingly serious environmental pollution pressure.
石油基塑料的广泛使用导致了严重的环境污染和石油资源短缺。在这项工作中，以没食子酸（GA）诱导的山药淀粉（YS）和壳聚糖（CS）为原料制备了可生物降解膜。研究了可生物降解膜对猪肉保鲜的保鲜效果。所制备的 GA/YS/CS 可生物降解膜具有更薄的厚度和更好的透光率，因为 CS 有效地降低了成膜溶液的粘度并削弱了其内部连接结构。SEM 结果和力学结果表明，YS、GA 和 CS 具有良好的相容性，GA 改性和添加 CS 显著提高了 YS 基膜的拉伸强度，因为 CS 的 NH 倾向于与淀粉分子的羟基形成氢键。感官分析结果表明，与聚乙烯膜包装相比，GA/YS/CS 薄膜可以有效地提高猪肉在贮藏过程中的品质。总之，由于其优异的机械性能、抗菌性能、抗氧化性能，本工作中制备的 GA/YS/CS 薄膜在猪肉保鲜方面具有实际应用潜力，并且可生物降解淀粉膜的开发和应用可以大大减轻日益严重的环境污染压力。
