Abstract
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.
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