The effects of ultraviolet (UV)‐C irradiation on the physicochemical properties of oyster mushroom polysaccharide (OMP) films were investigated. The prepared OMP films were subjected to UV‐C treatment (5.4 kJ m⁻²). UV‐C irradiation increased the tensile strength and decreased the water vapour permeability of the OMP films. In addition, the incorporation of 1.0% Cudrania tricuspidata leaf extract (CTLE) enhanced the antioxidant activity as well as antimicrobial activity of OMP films; however, UV‐C treatment did not affect the activities of films containing CTLE. Furthermore, UV‐C‐irradiated films had higher contact angles than non‐irradiated films, indicating increased surface hydrophobicity. Microstructural imaging revealed that UV‐C treatment caused the surface of treated films to be smoother than that of untreated films owing to surface degradation. These results indicated that UV‐C irradiation can be used for OMP films to improve film properties that are associated with application of films as food packaging material.

中文翻译：

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紫外线辐照对牡蛎蘑菇茎基多糖膜多糖理化性质的影响

研究了紫外线（C）辐照对牡蛎蘑菇多糖（OMP）膜理化性质的影响。制备的OMP薄膜经过UV-C处理（5.4 kJ m ^-2）。UV-C辐照提高了OMP膜的拉伸强度并降低了其水蒸气透过率。此外，掺入1.0％的dra木叶提取物（CTLE）增强了OMP膜的抗氧化活性和抗菌活性；但是，UV-C处理不会影响包含CTLE的薄膜的活性。此外，UV-C辐照的薄膜比非辐照的薄膜具有更高的接触角，表明表面疏水性增加。显微组织成像表明，由于表面降解，UV-C处理使处理过的膜表面比未处理过的膜表面光滑。这些结果表明，UV-C辐照可用于OMP薄膜，以改善与将薄膜用作食品包装材料相关的薄膜性能。