School of Materials & Chemistry, University of Shanghai for Science & Technology, Shanghai, China.
The Base of Achievement Transformation, Shidong Hospital Affiliated to University of Shanghai for Science and Technology, Shanghai, China.
J Food Sci. 2024 Nov;89(11):7803-7818. doi: 10.1111/1750-3841.17425. Epub 2024 Oct 8.
Bio-based active food packaging materials have a high market demand. We use coaxial electrospinning technology to prepare core-shell structured nanofibers with sustained antibacterial and antioxidant properties. The fiber core layer was composed of gelatin and tea polyphenols, whereas tea polyphenols provide antibacterial and antioxidant properties; the fiber sheath was composed of pullulan polysaccharides with antioxidant properties. By using a scanning electron microscope, it can be seen that the diameter distribution of the prepared nanofibers was uniform and the surface is smooth; using a transmission electron microscope, it can be clearly seen that the nanofibers have a core-shell structure; Fourier Transform Infrared and X-ray diffraction analysis indicate that the nanofibers have an amorphous structure; the 2,2-diphenyl-1-picrylhydrazyl free radical scavenging shows that nanofibers have higher antioxidant properties with the addition of tea polyphenols; antibacterial test showed that nanofibers had obvious inhibitory effect on the growth of Staphylococcus aureus and Escherichia coli; and the nanofiber film dissolution test shows that nanofibers can be used as fast soluble active packaging. Finally, core-sheath-structured nanofibers can serve as active packaging for instant food, possessing both rapid water solubility and excellent antibacterial and antioxidant activity, making water-soluble nanofibers interesting applications in the field of food packaging.
基于生物的活性食品包装材料具有很高的市场需求。我们使用同轴静电纺丝技术制备具有持续抗菌和抗氧化性能的核壳结构纳米纤维。纤维的芯层由明胶和茶多酚组成，而茶多酚提供抗菌和抗氧化性能；纤维的鞘层由具有抗氧化性能的普鲁兰多糖组成。通过扫描电子显微镜可以看出，所制备的纳米纤维的直径分布均匀，表面光滑；通过透射电子显微镜可以清楚地看到纳米纤维具有核壳结构；傅里叶变换红外和 X 射线衍射分析表明，纳米纤维具有无定形结构；2,2-二苯基-1-苦基肼自由基清除实验表明，纳米纤维具有较高的抗氧化性能，添加茶多酚后抗氧化性能更高；抗菌试验表明，纳米纤维对金黄色葡萄球菌和大肠杆菌的生长有明显的抑制作用；纳米纤维膜溶解试验表明，纳米纤维可用作快速溶解的活性包装。最后，核壳结构纳米纤维可用作速食食品的活性包装，具有快速水溶性和优异的抗菌和抗氧化活性，使水溶性纳米纤维在食品包装领域具有有趣的应用前景。
