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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 NameAffiliationPostcode
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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