乙酰化提高了基于纳米纤维素薄膜的柔性有机发光二极管（FOLED）基板的热稳定性和透光率。

Acetylation improves thermal stability and transmittance in FOLED substrates based on nanocellulose films.

作者信息

Yang Shuang, Xie Qiuxia, Liu Xiuyu, Wu Min, Wang Shuangfei, Song Xueping

机构信息

College of Light Industry and Food Engineering, Guangxi University Nanning 530004 PR China.

Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control Nanning 530004 PR China.

出版信息

RSC Adv. 2018 Jan 17;8(7):3619-3625. doi: 10.1039/c7ra11134g. eCollection 2018 Jan 16.

Bleached softwood pulp was used to prepare nanofibrillated cellulose (NFC) by mechanical grinding and a high-pressure homogenization process. Acetylation improved the aspect ratio and dispersion of the NFC; however, highly acetylated NFC was not able to form a film by vacuum filtration if the NFC : acetic anhydride (AA) ratio was greater than 1 : 6. An NFC film prepared by acetylated NFC has potential as a flexible organic light-emitting device (FOLED) substrate. Acetylation improved the thermal stability and transmittance of NFC films, which were optimal at 5.43 ppm K and 65%, respectively, when the ratio of NFC : AA was 1 : 3. Moreover, both the mechanical properties and flexibility of the NFC films were well maintained when the NFC : AA ratio was 1 : 3. Additionally, all NFC films prepared by acetylated NFC were smooth, flat, and uniform.

采用漂白针叶木浆通过机械研磨和高压均质工艺制备纳米纤化纤维素（NFC）。乙酰化改善了NFC的长径比和分散性；然而，如果NFC与乙酸酐（AA）的比例大于1∶6，高度乙酰化的NFC无法通过真空过滤形成薄膜。由乙酰化NFC制备的NFC薄膜有潜力作为柔性有机发光器件（FOLED）的基板。乙酰化提高了NFC薄膜的热稳定性和透光率，当NFC与AA的比例为1∶3时，热稳定性和透光率分别在5.43 ppm K和65%时达到最佳。此外，当NFC与AA的比例为1∶3时，NFC薄膜的机械性能和柔韧性都得到了很好的保持。此外，由乙酰化NFC制备的所有NFC薄膜都光滑、平整且均匀。