Food and Nutrition Program, Environment & Life Sciences Research Center, Kuwait Institute for Scientific Research, P.O. Box 24885, Safat-13109, Kuwait.
Food and Nutrition Program, Environment & Life Sciences Research Center, Kuwait Institute for Scientific Research, P.O. Box 24885, Safat-13109, Kuwait.
Carbohydr Polym. 2017 Feb 10;157:65-71. doi: 10.1016/j.carbpol.2016.09.069. Epub 2016 Sep 23.
Guar gum (GG) based nanocomposite (NC) films were prepared by incorporating silver-copper alloy nanoparticles (Ag-Cu NPs) through solution casting method. Effect of NP loadings (0.5-2%) on the thermo-mechanical, optical, spectral, oxygen barrier and antimicrobial properties of the GG/Ag-Cu NC films were investigated. Tensile testing showed an improvement in the mechanical strength, and a decrease in elongation at break for all NP loadings. NP incorporation into GG films showed a marked influence on the color values. The NC films showed excellent UV, light and oxygen barrier capability. Thermal properties of the NC films were improved as evidenced from the differential scanning calorimetry and the thermal conductivity data. NC films became rough and coarse over neat GG film as visualized through the scanning electron microscopy. A strong antibacterial activity was exhibited by NC films against both Gram-positive and Gram-negative bacteria, and therefore, the film could be considered as an active food packaging.
通过溶液浇铸法将银-铜合金纳米粒子（Ag-Cu NPs）掺入瓜尔胶（GG）基纳米复合材料（NC）中制备了 GG/Ag-Cu NC 薄膜。研究了 NP 负载量（0.5-2%）对 GG/Ag-Cu NC 薄膜的热机械、光学、光谱、氧阻隔和抗菌性能的影响。拉伸测试表明，所有 NP 负载量的机械强度都有所提高，而断裂伸长率都有所降低。NP 掺入 GG 薄膜会显著影响颜色值。NC 薄膜具有优异的 UV、可见光和氧气阻隔性能。从差示扫描量热法和热导率数据可以看出，NC 薄膜的热性能得到了改善。通过扫描电子显微镜可以观察到，NC 薄膜相对于纯 GG 薄膜变得粗糙和粗糙。NC 薄膜对革兰氏阳性菌和革兰氏阴性菌均表现出很强的抗菌活性，因此，该薄膜可以作为一种活性食品包装。
