As one of the most abundant renewable and biodegradable materials in nature, cellulose is difficult to dissolve in common organic and inorganic liquids. Here, a series of regenerated cellulose films were prepared by using a specific tetra-butylammonium hydroxide TBAH/H₂O/DMSO ternary solvent system. Especially, the fluorescent cellulose film was obtained successfully via a ring-opening grafting reaction between a modified fluorescein molecule with 3-expoxypropoxy and cellulose. The fluorescent cellulose films exhibited excellent fluorescence stability and pH sensitivity to the aqueous solutions with different degree of acid and alkaline. Moreover, the anisotropic fluorescein cellulose film was obtained for the first time by stretching and further drying the initial fluorescence cellulose hydrogel, and displayed a novel polarized emission. This work provided a simple, low-cost and environment-friendly pathway to fabricate fluorescent cellulose films, showing potential applications in packaging, decoration materials and other functional materials such as anti-counterfeiting paper.

作为自然界中最丰富的可再生和可生物降解的材料之一，纤维素很难溶解在普通的有机和无机液体中。在此，通过使用特定的四丁基氢氧化铵TBAH / H ₂制备了一系列的再生纤维素膜。O / DMSO三元溶剂系统。尤其是，通过具有3-环氧丙氧基的改性荧光素分子与纤维素之间的开环接枝反应，成功地获得了荧光纤维素膜。荧光纤维素膜对具有不同程度的酸和碱的水溶液表现出优异的荧光稳定性和pH敏感性。此外，通过拉伸并进一步干燥初始的荧光纤维素水凝胶来首次获得各向异性荧光素纤维素膜，并显示出新颖的偏振发射。这项工作为制造荧光纤维素膜提供了一种简单，低成本和环保的途径，显示出在包装，装饰材料和其他功能材料（例如防伪纸）中的潜在应用。