Department of Food Engineering and Bionanocomposite Research Institute, Mokpo National University, 61 Dorimri, Chungkyemyon, Muangun 534-729, Jeonnam, Republic of Korea.
Department of Food Engineering and Bionanocomposite Research Institute, Mokpo National University, 61 Dorimri, Chungkyemyon, Muangun 534-729, Jeonnam, Republic of Korea.
Int J Biol Macromol. 2014 Jul;68:258-66. doi: 10.1016/j.ijbiomac.2014.05.011. Epub 2014 May 12.
Carrageenan-based antimicrobial films were developed by incorporation of grape fruit seed extract (GSE) at different concentration into the polymer using a solvent casing method and their physical, mechanical, and antimicrobial properties were examined. The carrageenan/GSE composite films appeared yellowish tint due to the polyphenolic compounds in the GSE. SEM analysis showed rough surface with sponge like structures on the cross section of the films. FT-IR results indicated at GSE had good compatibility with carrageenan. The amorphous structure of polymer films was not changed by the incorporation of GSE. But, the addition of GSE increased moisture content, water vapor permeability, and surface hydrophilicity of the films. The tensile strength and elastic modulus decreased with increasing content of GSE, however, the elongation at break increased significantly up to 6.6μg/mL of GSE then decreased thereafter. Thermal stability of the films was not influenced by GSE incorporation. The carrageenan/GSE composite films exhibited great antibacterial activity against food borne pathogens. These results suggest that the carrageenan-based composite films have a high potential for being used as an antimicrobial or active food packaging applications.
采用溶剂铸膜法将柚子籽提取物（GSE）以不同浓度掺入聚合物中，制备了基于卡拉胶的抗菌薄膜，并对其物理、机械和抗菌性能进行了研究。由于 GSE 中的多酚化合物，卡拉胶/GSE 复合薄膜呈现出淡黄色色调。SEM 分析表明，薄膜的横截面具有粗糙的表面和海绵状结构。FT-IR 结果表明 GSE 与卡拉胶具有良好的相容性。聚合物薄膜的非晶结构没有因 GSE 的加入而改变。但是，GSE 的加入增加了薄膜的水分含量、水蒸气透过率和表面亲水性。随着 GSE 含量的增加，拉伸强度和弹性模量降低，而断裂伸长率显著增加至 6.6μg/mL 的 GSE 后，随后又降低。GSE 的加入并不影响薄膜的热稳定性。卡拉胶/GSE 复合薄膜对食源性病原体表现出很强的抗菌活性。这些结果表明，基于卡拉胶的复合薄膜具有作为抗菌或活性食品包装应用的巨大潜力。
