Journal
CELLULOSE
Volume 27, Issue 3, Pages 1315-1326Publisher
SPRINGER
DOI: 10.1007/s10570-019-02876-1
Keywords
Bleached bamboo pulp; Enzyme pretreatment; Morphology tailoring; Cellulose nanoparticles; Accurately controlled haze
Funding
- National Natural Science Foundation of China [21703131, 31370578]
- Doctoral Scientific Research Foundation of Shaanxi University of Science and Technology [2016BJ-40]
- State Key Laboratory of Pulp and Paper Engineering [201821]
- Special Research Fund by Shaanxi Provincial Department of Education [18JK0122]
- Chinese Postdoctoral Science Foundation [2018M643707]
- Natural Science Basic Research Plan in Shaanxi Province of China [2019JQ-516]
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A series of cellulose nanoparticles (CNPs), including cellulose nanofibrils (CNFs) and cellulose nanocrystals (CNCs-n, n = 1, 2, 3, or 4), was prepared from bleached bamboo pulp. Those CNPs exhibited various morphologies, such as fibrous (CNFs), short rod (CNCs-1), clubbed (CNCs-3), and spherical shapes (CNCs-2 and CNCs-4). The results showed that enzyme pretreatment was feasible for improving crystallinity and size uniformity but also CNP thermal stability. The haze performance of the nanopapers was strongly dependent on CNP morphology. Furthermore, with changes in the hybrid ratio between CNFs and CNCs-2, the transparency of produced nanopapers was maintained at a high level (89-95%). Optical haze was accurately controlled with arbitrary continuous adjustable values in the range of 5-77%. Those cellulose nanopapers with controllable haze offered the potential for applications in light diffusors and flexible optoelectronics. [GRAPHICS] .
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