We prepared a self-dispersed cellulose-based microgel via chemically bonding hydrophilic gelatin peptide chain onto cellulose glucose chain. Following, a variety of highly transparent, foldable, and writable photoluminescent polymer films was obtained through loading organic dyes and inorganic pigments onto cellulose-based microgel matrix, respectively. Benefiting from the coupling sites and network effect of microgel as well as the abundant hydroxyl, amino, and imino groups in its structure, the microgel containing organic dyes and inorganic pigments exhibit good dispersion and stability, and the resultant photoluminescent films emit bright yellow, orange, yellow-green, and blue-green fluorescence under UV light, respectively, especially the cellulose-based microgel stabilized inorganic alkaline earth aluminate hybrids exhibit continuous luminescence for a long time in the dark. Compared with the existing regenerated cellulose or CNCs-based fluorescent films, the cellulose-based microgel fluorescent films present higher transmittance and good biodegradability. This study can bring new ideas for the development of flexible luminescent devices.

我们通过将亲水性明胶肽链化学键合到纤维素葡萄糖链上制备了一种自分散的纤维素基微凝胶。随后，通过将有机染料和无机颜料分别负载到纤维素基微凝胶基质上，获得了各种高度透明、可折叠和可写的光致发光聚合物薄膜。得益于微凝胶的偶联位点和网络效应以及其结构中丰富的羟基、氨基和亚氨基，含有有机染料和无机颜料的微凝胶表现出良好的分散性和稳定性，所得光致发光薄膜发出亮黄色、橙色在紫外光下分别发出黄绿色和蓝绿色荧光，尤其是纤维素基微凝胶稳定的无机碱土铝酸盐杂化物在黑暗中表现出长时间的连续发光。与现有的再生纤维素或CNCs基荧光膜相比，纤维素基微凝胶荧光膜具有更高的透光率和良好的生物降解性。该研究可为柔性发光器件的开发带来新思路。