Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, China.
Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Science, Qingdao, 266101, China.
Carbohydr Polym. 2018 Nov 15;200:100-105. doi: 10.1016/j.carbpol.2018.07.069. Epub 2018 Jul 24.
The applications of cellulose are increasing rapidly attributing to their biodegradability and renewability. However, most of these cellulose-based materials possess poor mechanical performance, which restrict their advanced applications. In this study, a facile method was applied to fabricate composite paper with excellent mechanical and barrier properties via simple coating dissolved cellulose in ionic liquid. Subsequently, the surface wettability, oxygen permeability and mechanical properties of the resulting composites were investigated. Remarkable, both the dry and wet tensile strength of the composite papers was dramatically increased up to 101 and 14.17 MPa, which was greater than controlled paper (63.98 and 1.15 MPa). Moreover, with only 2% weight loading of regenerated cellulose, million times decline of oxygen permeability coefficient was obtained. Though the composite papers showed enhanced hydrophilicity, it exhibited strong water-resistant and shape-retaining properties in water. Therefore, the resultant composite papers showed great potential in packaging application with higher humidity.
纤维素的应用正在迅速增加，这归因于其生物降解性和可再生性。然而，这些基于纤维素的材料中的大多数都具有较差的机械性能，这限制了它们的高级应用。在这项研究中，通过简单的涂层方法将溶解在离子液体中的纤维素制备成具有优异机械性能和阻隔性能的复合纸。随后，研究了所得复合材料的表面润湿性、氧气透过性和机械性能。值得注意的是，复合纸的干拉伸强度和湿拉伸强度分别大幅提高至 101 MPa 和 14.17 MPa，高于对照纸（分别为 63.98 MPa 和 1.15 MPa）。此外，仅添加 2%重量比的再生纤维素，氧气透过系数就降低了 100 万倍。尽管复合纸的亲水性得到了增强，但它在水中仍表现出很强的耐水和保持形状的特性。因此，所得复合纸在高湿度的包装应用中具有很大的潜力。
