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Study on the Microstructure of Cellulose Nanofibril During Dehydration |
Received:September 19, 2021 |
DOI:10.11980/j.issn.0254-508X.2022.04.010 |
Key Words:cellulose nanofibril dehydration re-dispersibility self-assembly |
Fund Project:国家重点研发计划(2020YFC1910301);山东省科教产融合创新试点工程项目(2020KJC-ZD06)。 |
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Abstract:In this study, cellulose nanofibril (CNF) with different solid contents after thermal drying were used to investigate the effect of dehydration degree on the re-dispersibility of CNF and their microstructure changes. The results showed that the re-dispersibility of CNF was affected due to the agglomeration of CNF and causing reorganization of inter/intra molecular hydrogen bonds. With the increase of dehydration degree, when CNF solid content increased from 20.21% to 41.88%, the Zeta potential decreased by 6.3 mV, and its stability decreased. When CNF solid content increased from 2.38% to 100%, the transmittance decreased to 43%, the crystallinity and grain size increased by 50.31% and 1.4 times, respectively, whereas its re-dispersibility decreased. Comprehensive analysis found that the solid content of CNF was less than 20%, which had little effect on its microstructwre and re-dispersibility. |
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