Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing 100083, China; Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
Int J Biol Macromol. 2021 Mar 15;173:285-292. doi: 10.1016/j.ijbiomac.2021.01.128. Epub 2021 Jan 21.
To realize the application of xylan based film in food and drug packaging, the poor mechanical property and film-forming property of xylan based film must be overcome. Herein, a good oxygen barrier composite film with desired mechanical properties was prepared based on carboxymethly xylan (CMX), chitosan (CS), and graphene oxide (GO). The results of scanning electron microscope revealed the composite film had a dense and continuous structure, which will endow the composite film with excellent mechanical property. As expected, the composite film with the 0.5% mass fraction of GO exhibited best mechanical property, among which the tensile stress, tensile strain, and Young's modulus of the composite film reached 50.81 MPa, 47.61%, and 1.39 GPa, respectively. The oxygen barrier properties of the composite films significantly increased with the addition of graphene oxide due to the dense, stacked multilayer structure. In addition, these composite films exhibited good antibacterial properties. Therefore, these films show great promise in the field of food packaging and wound dressing due to their excellent mechanical, oxygen barrier and antibacterial properties.
为了实现木聚糖基薄膜在食品和药品包装中的应用，必须克服木聚糖基薄膜机械性能和成膜性能差的问题。在此基础上，以羧甲基木聚糖（CMX）、壳聚糖（CS）和氧化石墨烯（GO）为原料，制备了具有理想力学性能的良好的氧气阻隔性复合膜。扫描电子显微镜的结果表明，复合膜具有致密连续的结构，这将赋予复合膜优异的力学性能。不出所料，添加质量分数为 0.5%的 GO 的复合膜表现出最佳的力学性能，其中复合膜的拉伸应力、拉伸应变和杨氏模量分别达到 50.81 MPa、47.61%和 1.39 GPa。由于致密、堆叠的多层结构，复合膜的氧气阻隔性能随着氧化石墨烯的添加而显著提高。此外，这些复合膜还表现出良好的抗菌性能。因此，由于其优异的机械性能、氧气阻隔性能和抗菌性能，这些薄膜在食品包装和伤口敷料领域具有广阔的应用前景。
