Acetylation improves thermal stability and transmittance in FOLED substrates based on nanocellulose films. Issue 7 (17th January 2018)

• Record Type: Journal Article
• Authors: Yang, Shuang; Xie, Qiuxia; Liu, Xiuyu; Wu, Min; Wang, Shuangfei; Song, Xueping
• Is Part Of: RSC advances. Volume 8:Issue 7(2018)
• Page Start: 3619
• Page End: 3625
• Publication Date: 2018-01-17
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra11134g
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Bleached softwood pulp was used to prepare nanofibrillated cellulose (NFC) by mechanical grinding and a high-pressure homogenization process. Abstract : 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 −1 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.