School of Textile Science and Engineering, Xi'an Polytechnic University, Xi'an, 710048, Shaanxi, China; Key Laboratory of Functional Textile Material and Product, Xi'an Polytechnic University, Ministry of Education, Xi'an, 710048, Shaanxi, China.
School of Textile Science and Engineering, Xi'an Polytechnic University, Xi'an, 710048, Shaanxi, China.
Carbohydr Polym. 2021 Jul 1;263:117977. doi: 10.1016/j.carbpol.2021.117977. Epub 2021 Mar 24.
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.
我们通过将亲水明胶肽链化学结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，得到了各种高度透明、可折叠和可书写的发光明信片聚合物薄膜。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，所得发光明信片在紫外光下分别发出亮黄色、橙色、黄绿光和蓝绿光，特别是基于纤维素的微凝胶稳定的无机堿土金属铝酸盐杂化物在黑暗中长时间持续发光。与现有的再生纤维素或 CNCs 基荧光膜相比，基于纤维素的微凝胶荧光膜具有更高的透光率和良好的生物降解性。本研究可为柔性发光器件的发展带来新的思路。
