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Integrated Preparation and Characterization of Lignin Containing Cellulose Nanocrystal and Nanofibril from Old Newspaper
Received:August 06, 2021  
DOI：10.11980/j.issn.0254-508X.2021.11.002
Key Words:old newspaper  lignin containing cellulose nanocrystal （LCNC）  lignin containing cellulose nanofibril （LCNF）  integrated preparation
Fund Project:国家自然科学基金（31971602）；山东省高等学校科技计划（2019KJC014）；科教产融合科技创新工程项目（2020KJC-ZD14）。
Author NameAffiliationPostcode
WANG Yingchao State Key Lab of Bio-based Materials and Green Papermaking/Key Lab of Pulp & Paper of Science and Technology of Education Ministry， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353 250353
YANG Yifan State Key Lab of Bio-based Materials and Green Papermaking/Key Lab of Pulp & Paper of Science and Technology of Education Ministry， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353 250353
WANG Jin State Key Lab of Bio-based Materials and Green Papermaking/Key Lab of Pulp & Paper of Science and Technology of Education Ministry， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353 250353
WANG Yilin State Key Lab of Bio-based Materials and Green Papermaking/Key Lab of Pulp & Paper of Science and Technology of Education Ministry， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353 250353
WEI Kefan State Key Lab of Bio-based Materials and Green Papermaking/Key Lab of Pulp & Paper of Science and Technology of Education Ministry， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353 250353
LIU Shanshan State Key Lab of Bio-based Materials and Green Papermaking/Key Lab of Pulp & Paper of Science and Technology of Education Ministry， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353 250353
JI Xingxiang State Key Lab of Bio-based Materials and Green Papermaking/Key Lab of Pulp & Paper of Science and Technology of Education Ministry， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353 250353
HAN Chenxiao Shandong Century Sunshine Paper Group Co.， Ltd.， Weifang， Shandong Province， 262499 262499
WANG Qiang* State Key Lab of Bio-based Materials and Green Papermaking/Key Lab of Pulp & Paper of Science and Technology of Education Ministry， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353 250353
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Abstract:In this study， lignin containing cellulose nanocrystal （LCNC） was produced from old newspaper using sulfuric acid hydrolysis process， and then acidolysis precipitated lignocellulosic solid residues （LCSR） were mechanically defibrillated into lignin containing cellulose nanofibril （LCNF） by ultrasonic assisted grinding method， which realized the integrated preparation of LCNC and LCNF with overall yield more than 85%. The structural characteristics of LCNC and LCNF samples were characterized and the results showed that LCNC displayed rod-like crystal structure， while LCNF presented long filament structure. Lignin existed in LCNC and LCNF as globular-like particles. The average length and width of LCNC were 143.6 and 24.8 nm， respectively， and the average diameter of LCNF was 16.2 nm. XRD results demonstrated that the cellulose type I structure was still retained in all LCNC and LCNF， and the higher the content of lignin in the sample， the lower the crystallinity. Meanwhile， the high hydrophobicity and thermal stability of lignin made LCNC and LCNF with large lignin content had better hydrophobicity and thermal stability.
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