Lin Wanmei, Ni Yongsheng, Pang Jie
College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
Carbohydr Polym. 2019 Oct 15;222:114986. doi: 10.1016/j.carbpol.2019.114986. Epub 2019 Jun 11.
Here, inspired by the hydrophilic/hydrophobic theory, a novel konjac glucomannan/poly (methyl methacrylate)/chlorogenic acid (KGM/PMMA/CGA) food packaging film was successfully fabricated via microfluidic spinning technology (MST). The results of fourier transform infrared spectroscopy and x-ray diffraction confirmed the formation of hydrogen bonds in the films, which lead to the enhanced mechanical properties. Thermogravimetric analysis and differential scanning calorimetry showed excellent thermal stability of the films. Water vapor permeability (1.47 × 10 ± 0.11 g/(m⋅h⋅kPa)) and water contact angle (89.2°) measurement proved that the films were hydrophobic. The good swelling degree (85.18 ± 15.65%) indicated film's potentials in releasing CGA. More importantly, KGM played a key role in the antibacterial activities against Staphylococcus aureus (8.5 ± 3.5 mm) and Escherichia coli (6.5 ± 2.1 mm) by utilizing its hydrophilicity. Thus, our present work may provide a new idea for constructing active food packaging films with significant performances based on hydrophilic/hydrophobic strategy.
在此，受亲水/疏水理论的启发，通过微流控纺丝技术（MST）成功制备了一种新型魔芋葡甘聚糖/聚（甲基丙烯酸甲酯）/绿原酸（KGM/PMMA/CGA）食品包装薄膜。傅里叶变换红外光谱和X射线衍射结果证实了薄膜中氢键的形成，这导致了机械性能的增强。热重分析和差示扫描量热法表明薄膜具有优异的热稳定性。水蒸气透过率（1.47×10±0.11 g/(m⋅h⋅kPa)）和水接触角（89.2°）测量证明薄膜具有疏水性。良好的溶胀度（85.18±15.65%）表明薄膜在释放CGA方面具有潜力。更重要的是，KGM通过利用其亲水性在对金黄色葡萄球菌（8.5±3.5 mm）和大肠杆菌（6.5±2.1 mm）的抗菌活性中发挥了关键作用。因此，我们目前的工作可能为基于亲水/疏水策略构建具有显著性能的活性食品包装薄膜提供新思路。
