College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, PR China.
AEMG Academy, Melbourne 3127, Australia.
Int J Biol Macromol. 2024 Nov;281(Pt 3):136237. doi: 10.1016/j.ijbiomac.2024.136237. Epub 2024 Oct 12.
The purpose of this study was to synthesize crosslinked films from methylcellulose (MC) and sodium alginate (SA) using a straightforward ion exchange technique in a ZnCl coagulation bath. The resulting MC/ZA blend films exhibited significant improvements in thermal stability, with a measured increase of 191 °C in degradation temperature compared to MC film. The introduction of zinc ion (Zn) enhanced the flame retardancy of MC/ZA film, achieving a 92.4 % reduction in flammability. The microstructure of the MC/ZA blend film displayed a relatively smooth surface, indicating better biocompatibility between MC and ZA. Additionally, the barrier property of the MC/ZA film was improved, with a 35 % reduction in permeability to water vapor, and the mechanical properties were strengthened, showing a slightly reduction of 5 % in tensile strength. Furthermore, the MC/ZA blend film demonstrated enhanced antibacterial effectiveness, with a 99.99 % of S. aureus and E. coli, implying their suitability for packaging applications involving high oil content foods.
本研究旨在使用简单的离子交换技术，在 ZnCl 凝固浴中合成甲基纤维素 (MC) 和海藻酸钠 (SA) 的交联膜。所得 MC/ZA 共混膜的热稳定性显著提高，与 MC 膜相比，降解温度提高了 191°C。锌离子 (Zn) 的引入增强了 MC/ZA 膜的阻燃性，可燃性降低了 92.4%。MC/ZA 共混膜的微观结构显示出相对光滑的表面，表明 MC 和 ZA 之间具有更好的生物相容性。此外，MC/ZA 膜的阻隔性能得到改善，水蒸气透过率降低了 35%，机械性能得到增强，拉伸强度略有降低，为 5%。此外，MC/ZA 共混膜表现出增强的抗菌效果，对金黄色葡萄球菌和大肠杆菌的抑菌率达到 99.99%，表明其适用于含有高油含量食品的包装应用。
