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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）。 |
| Author Name | Affiliation | Postcode | | YANG Shuo | State Key Lab of Bio-based Material and Green Papermaking, Qilu University of Technology （Shandong Academy of Sciences）, Ji’nan, Shandong Province, 250353 | 250353 | | LI Ziyuan | State Key Lab of Bio-based Material and Green Papermaking, Qilu University of Technology （Shandong Academy of Sciences）, Ji’nan, Shandong Province, 250353 | 250353 | | DING Qijun | State Key Lab of Bio-based Material and Green Papermaking, Qilu University of Technology （Shandong Academy of Sciences）, Ji’nan, Shandong Province, 250353 | 250353 | | LOU Jiang | State Key Lab of Bio-based Material and Green Papermaking, Qilu University of Technology （Shandong Academy of Sciences）, Ji’nan, Shandong Province, 250353 | 250353 | | HAN Wenjia* | State Key Lab of Bio-based Material and Green Papermaking, Qilu University of Technology （Shandong Academy of Sciences）, Ji’nan, Shandong Province, 250353 | 250353 |
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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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