Research Division for Sustainable Papermaking & Advanced Materials, Key Laboratory of Biobased Materials Science and Technology (Ministry of Education), Northeast Forestry University, Harbin, China.
Research Division for Sustainable Papermaking & Advanced Materials, Key Laboratory of Biobased Materials Science and Technology (Ministry of Education), Northeast Forestry University, Harbin, China; Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan, China.
Int J Biol Macromol. 2024 May;268(Pt 2):131790. doi: 10.1016/j.ijbiomac.2024.131790. Epub 2024 Apr 26.
The demand for paper-based packaging materials as an alternative to incumbent disposable petroleum-derived polymers for food packaging applications is ever-growing. However, typical paper-based formats are not suitable for use in unconventional applications due to inherent limitations (e.g., excessive hydrophilicity, lack antimicrobial ability), and accordingly, enabling new capabilities is necessity. Herein, a simple and environmentally friendly strategy was proposed to introduce antimicrobial and hydrophobic functions to cellulose paper through successive chemical grafting of 3-aminopropyltriethoxysilane (APS) and cinnamaldehyde (CA). The results revealed that cellulose paper not only showed long-term antibacterial effect on different bacteria, but also inhibited a wide range of fungi. Encouragingly, the modified paper, which is fluorine-free, displays a high contact angle of 119.7°. Thus, even in the wet state, the modified paper can still maintain good mechanical strength. Meanwhile, the multifunctional composite papers have excellent biocompatibility and biodegradability. Compared with ordinary cellulose paper, multifunctional composite paper can effectively prolong the shelf life of strawberries. Therefore, the multifunctional composite paper represents good application potential as a fruit packaging material.
对于食品包装应用而言，人们对于纸质包装材料的需求正在与日俱增，这种材料可以替代传统的一次性石油基聚合物。然而，由于其固有的局限性（例如，过度亲水性、缺乏抗菌能力），典型的纸质包装并不适用于非常规应用，因此，有必要赋予其新的功能。在此，提出了一种简单且环保的策略，通过 3-氨丙基三乙氧基硅烷（APS）和肉桂醛（CA）的连续化学接枝，将抗菌和疏水性功能引入纤维素纸中。结果表明，纤维素纸不仅对不同细菌表现出长期的抗菌效果，而且还能抑制广泛的真菌。令人鼓舞的是，经过修饰的纸张不含氟，其接触角高达 119.7°。因此，即使在潮湿状态下，改性纸仍能保持良好的机械强度。同时，多功能复合纸具有良好的生物相容性和可生物降解性。与普通纤维素纸相比，多功能复合纸可以有效延长草莓的保质期。因此，多功能复合纸作为水果包装材料具有良好的应用潜力。
