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Study on Modified Lignin Used for Paper Strengthening |
Received:April 18, 2025 Revised:May 06, 2025 |
DOI:10.11981/j.issn.1000-6842.2025.02.10 |
Key Words:lignin/Cu ion nanoparticles;modified lignin;paper strength |
Fund Project:国家自然科学基金青年项目(22408392);江苏省自然科学基金青年项目(BK20240293,BK20230127);中国博士后科学基金面上项目(2024M753540);中国博士后科学基金特别资助项目(2023TQ0374)。 |
Author Name | Affiliation | Postcode | LYU Yan* | Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, Jiangsu Province, 210042 | 210042 | HAN Shanming | Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, Jiangsu Province, 210042 | 210042 | LI Jiongjiong | College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu Province, 210037 | 210037 | LIANG Fangmin* | Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, Jiangsu Province, 210042 Shandong Huatai Paper Co., Ltd., & Shandong Yellow Triangle Biotechnology Industry Research Institute Co., Ltd., Dongying, Shandong Province, 257335 School of Light Industry and Food Engineering, Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control, Guangxi University, Nanning, Guangxi Zhuang Autonomous Region, 530004 | 530004 | FANG Guigan* | Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, Jiangsu Province, 210042 | 210042 |
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Abstract: |
Using alkali lignin as raw material, lignin/copper ion nanoparticles (LNP/Cu) containing rich amounts of ortho-quinone and ortho-phenol were prepared using a self-assembly catalytic oxidation-reduction method. The alkali lignin and LNP/Cu were taken as paper reinforcement, via hot-press drying methods instead of room-temperature drying method to prepare reinforced paper. The effects of the additive and drying methods on paper strength properties were investigated. The results showed that the LNP/Cu prepared in this study exhibited a spherical shape with a diameter of approximately 300 nm and could be uniformly distributed in the paper, demonstrating superior reinforcement effects compared to alkali lignin. The hot-press drying method enhanced the interaction between lignin and fibers. Compared to paper produced without additives and using room-temperature drying, the tensile index, bursting index, and tearing index of the reinforced paper produced with LNP/Cu as an additive combined with the hot-press drying method (120 ℃, 0.14 MPa, 10 min) increased by 27.5%, 51.0%, and 9.6%, respectively, while the air permeability decreased by 38.8%. |
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