Roy Swarup, Rhim Jong-Whan
Department of Food and Nutrition, BioNanocomposite Research Institute, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea.
Polymers (Basel). 2020 Nov 12;12(11):2665. doi: 10.3390/polym12112665.
Edible biopolymer (pullulan/carrageenan) based functional composite films were fabricated by the addition of copper sulfide nanoparticles (CuSNP) and D-limonene (DL). The DL and CuSNP were compatible with the pullulan/carrageenan biopolymer matrix. The addition of CuSNP significantly increased the UV-blocking properties without substantially reducing the transparency of the film. The addition of CuSNP improved the film's tensile strength by 10%; however, the DL addition did not significantly influence the strength, while the combined addition of CuSNP and DL increased the strength by 15%. The addition of the fillers did not significantly affect the thermal stability of the film, but the water vapor barrier property was slightly improved. There was no significant change in the moisture content and hydrophobicity of the composite film. Besides, the composite film showed some antimicrobial activity against food-borne pathogenic bacteria. The fabricated pullulan/carrageenan-based film with antimicrobial and UV-barrier properties is likely to be used in active food packaging applications.
通过添加硫化铜纳米颗粒（CuSNP）和D-柠檬烯（DL）制备了基于可食用生物聚合物（普鲁兰多糖/卡拉胶）的功能性复合薄膜。DL和CuSNP与普鲁兰多糖/卡拉胶生物聚合物基质相容。CuSNP的添加显著提高了薄膜的紫外线阻隔性能，而没有大幅降低薄膜的透明度。CuSNP的添加使薄膜的拉伸强度提高了10%；然而，DL的添加对强度没有显著影响，而CuSNP和DL的联合添加使强度提高了15%。填料的添加对薄膜的热稳定性没有显著影响，但水蒸气阻隔性能略有改善。复合薄膜的水分含量和疏水性没有显著变化。此外，复合薄膜对食源性病原体细菌表现出一定的抗菌活性。所制备的具有抗菌和紫外线阻隔性能的基于普鲁兰多糖/卡拉胶的薄膜可能用于活性食品包装应用。
