Application of luminescent film prepared from cellulose derivative as food packaging film

Abstract

The invention discloses an application of a luminescent film prepared from a cellulose derivative as a food packaging film. The cellulose derivative is hydroxypropyl methyl cellulose modified by a methacrylic acid group. The transparent and flexible film not only has relatively high mechanical strength, biocompatibility and thermal stability, but also has adjustable permeability and good ultraviolet resistance. More importantly, even if the film is exposed to strong ultraviolet radiation, the change of the performance of the film can be neglected, which demonstrates high durability of the CT film. In addition, the film has a self-indicating capability and can show the change of luminous intensity in the thawing process of a frozen meat product. All the characteristics show that the film has the potential of serving as a dual self-indicating food packaging material, and the material not only can protect food from being influenced by illumination, but also can maintain the packaging internal environment through the adjustable permeability and wettability of the material, so that the aim of prolonging the shelf life of the packaged food is achieved. 本发明公开一种由纤维素衍生物制成的发光薄膜作为食物包装膜的应用，所述纤维素衍生物为甲基丙烯酸基团修饰的羟丙基甲基纤维素。本发明该透明、柔韧的膜不仅具有较高的力学强度、生物相容性和热稳定性，而且具有可调的渗透性和良好的抗紫外线性能。更重要的是，即使将膜暴露在强烈紫外线辐射下，其性能的变化也可以忽略不计，这证明了CT膜的高耐久性。此外，该膜拥有自指示能力，并能够在冷冻肉制品解冻过程中展现发光强度的变化。以上特点都表明，该膜有作为一种双重自指示食品包装材料的潜力，这种材料不仅可以保护食品免受光照的影响，而且可以通过其可调的渗透性和可湿性来维持包装内环境，达到延长被包装食品保质期的目的。