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| Improving the Strength Properties of Liner Board by Cellulose Nanocrystal |
| Received:August 01, 2020 |
| DOI：10.11980/j.issn.0254-508X.2020.12.003 |
| Key Words:recycled pulp cellulose nanocrystal cationic starch cationic polyacrylamide strengthening agent strength properties |
| Fund Project:国家自然科学基金(31670584,31971602)；山东省省属高校优秀青年人才联合基金(ZR2018JL015)；山东省高等学校青创科技计划创新团队(2019KJC014)。 |
| Author Name | Affiliation | Postcode | | 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 | | HE Huili | 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 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 | | 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 | | MU Yongsheng | Jiangsu Jinke Total Solutions Co., Ltd., Nanjing, Jiangsu Province, 211200 | 211200 | | HAN Chenxiao | Shandong Century Sunshine Paper Group Co., Ltd., Weifang, Shandong Province, 262499 | 262499 |
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| Abstract:In this study， cellulose nanocrystal （CNC） was prepared by sulfuric acid hydrolysis from recycled pulp and applied to enhance the liner board. The results showed that the prepared CNC displayed a typical rod-like structure with a diameter and length of about 11~23 nm and 115~240 nm， respectively， the aspect ratio was 5∶1 to 22∶1 and Zeta potential was -56.37 mV. The aggregation state of CNC presented cellulose I structure with the crystallinity of 71.1%， and its thermal stability was slightly lower than that of recycled pulp. In the reinforcement experiment with 3% CNC dosage， tensile index， tearing index， burst index， ring crush index and folding endurance of liner board were 30.5 N·m/g， 6.22 mN·m2/g， 1.55 kPa·m2/g， 9.18 N·m/g and 3 times， respectively. Then， 2% cationic starch （CS） and 2% cationic polyacrylamide （CPAM） were combined with 3% CNC respectively to form the binary reinforcement systems， tensile index， tearing index， burst index， ring crush index and folding endurance of liner board were further increased by 30.5%， 4.1%， 12.7%， 11.6%， 33.3% and 21.9%， 3.5%， 12.3%， 10.6%， 33.3% compared to those of 3% CNC dosage respectively. |
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