Zhang Shuangsheng, Sun Penghao, Lin Xiangyu, Wang Hongxiao, Huang Xujuan, Liu He, Xu Xu
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, 210037 Nanjing, China.
Institute of Chemical Industry of Forestry Products, Chinese Academy of Forestry, Nanjing 210042, Jiangsu Province, China.
Int J Biol Macromol. 2025 Jan;285:138076. doi: 10.1016/j.ijbiomac.2024.138076. Epub 2024 Nov 29.
Nowadays, plastics are widely used in daily life, but they pose huge threats to both the environment and human health. Therefore, it is imperative to develop green, sustainable and high-performance cellulose-based paper materials to replace plastics. A key challenge for paper-based packaging materials is the need for waterproof and oil-resistant properties. However, most current solutions rely on harmful fluorocarbon coatings or organic solvents, raising safety and environmental concerns. Herein, we present a novel waterproof and oil-resistant coating solution composed solely of polyvinyl alcohol (PVA) and bentonite (BT) nanosheets. When applied to sugarcane paper, this composite paper demonstrates excellent water resistance, with a 64 % water absorption rate, which is 48.4 % lower than untreated paper. Additionally, the composite paper exhibits high mechanical strength (tensile strength: 50.47 MPa, Young's modulus: 3.14 GPa) and superior barrier properties with a water vapor transmission rate of 4.59 g/(m·24h) and an oxygen transmission rate of 264.959 cm/(m·24h·0.1 MPa). Furthermore, this composite paper shows promise in fruit preservation and holds great potential for broader applications in the food packaging industry.
如今，塑料在日常生活中被广泛使用，但它们对环境和人类健康都构成了巨大威胁。因此，开发绿色、可持续且高性能的纤维素基纸质材料来替代塑料势在必行。纸质包装材料面临的一个关键挑战是需要具备防水和耐油性能。然而，目前大多数解决方案依赖有害的碳氟化合物涂层或有机溶剂，这引发了安全和环境方面的担忧。在此，我们提出一种仅由聚乙烯醇（PVA）和膨润土（BT）纳米片组成的新型防水耐油涂层解决方案。当应用于甘蔗纸时，这种复合纸表现出优异的防水性能，吸水率为64%，比未处理的纸张低48.4%。此外，复合纸具有较高的机械强度（拉伸强度：50.47MPa，杨氏模量：3.14GPa）以及优异的阻隔性能，水蒸气透过率为4.59g/(m·24h)，氧气透过率为264.959cm/(m·24h·0.1MPa)。此外，这种复合纸在水果保鲜方面显示出前景，在食品包装行业具有更广泛应用的巨大潜力。
