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| Effect of Lignin-like Precursor Small Molecules on Pulp Properties in Formic Acid Cooking |
| Received:August 20, 2024 |
| DOI：10.11980/j.issn.0254-508X.2025.01.013 |
| Key Words:formic acid lignin-like lignin precursor small molecules pulp |
| Fund Project:国家自然科学基金项目（02056294，32271821，22208175）；山东省高等学校青年创新团队项目（2023KJ133）；齐鲁工业大学培优项目（2023PY032）；济南高校二十条创新团队项目（202228076）。 |
| Author Name | Affiliation | Postcode | | ZHANG Hongyu | Key Lab of Paper Science and Technology of Ministry of Education, Faculty of Light Industry, Qilu University of Technology （Shandong Academy of Sciences）, Ji’nan,Shandong Province, 250353
State Key Lab of Biobased Material and Green Papermaking, Qilu University of Technology （Shandong Academy of Sciences）, Ji’nan,Shandong Province, 250353 | 250353 | | NI Shuzhen* | Key Lab of Paper Science and Technology of Ministry of Education, Faculty of Light Industry, Qilu University of Technology （Shandong Academy of Sciences）, Ji’nan,Shandong Province, 250353
State Key Lab of Biobased Material and Green Papermaking, Qilu University of Technology （Shandong Academy of Sciences）, Ji’nan,Shandong Province, 250353 | 250353 | | ZHANG Yongchao* | Key Lab of Paper Science and Technology of Ministry of Education, Faculty of Light Industry, Qilu University of Technology （Shandong Academy of Sciences）, Ji’nan,Shandong Province, 250353
State Key Lab of Biobased Material and Green Papermaking, Qilu University of Technology （Shandong Academy of Sciences）, Ji’nan,Shandong Province, 250353 | 250353 | | CHEN Xiaoqian | Key Lab of Paper Science and Technology of Ministry of Education, Faculty of Light Industry, Qilu University of Technology （Shandong Academy of Sciences）, Ji’nan,Shandong Province, 250353
State Key Lab of Biobased Material and Green Papermaking, Qilu University of Technology （Shandong Academy of Sciences）, Ji’nan,Shandong Province, 250353 | 250353 | | WANG Zhaojiang | Key Lab of Paper Science and Technology of Ministry of Education, Faculty of Light Industry, Qilu University of Technology （Shandong Academy of Sciences）, Ji’nan,Shandong Province, 250353
State Key Lab of Biobased Material and Green Papermaking, Qilu University of Technology （Shandong Academy of Sciences）, Ji’nan,Shandong Province, 250353 | 250353 | | QIN Menghua* | School of Chemistry and Chemical Engineering, Qilu Normal University, Ji’nan,Shandong Province, 250200 | 250200 |
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| Abstract:In this study， a formic acid cooking system with cooperation with lignin-like precursor small molecules was constructed. In the cooking process， the nucleophilic reaction between lignin-like precursor small molecules and lignin carbocations was used to inhibit the condensation between lignin molecules， thereby improving the lignin removal rate. The effects of lignin-like precursor small molecules on the whiteness of pulp and the strength of paper were investigated. The results showed that when the formic acid was used to separate the components of poplar and pine in a cooking system with p-hydroxybenzaldehyde， p-hydroxybenzoic acid， vanillin， guaiacol， syringol， salicylic acid， and benzaldehyde， respectively， whiteness of poplar pulp（70.2%）was higher than that of pine pulp（57.6%）. Compared with the pure formic acid cooking system， the whiteness of poplar pulp obtained by the formic acid synergistic cooking system with guaiacol or syringol increased from 41.5% to 70.2% and 69.4%， respectively. Meanwhile， the cellulose content in the obtained poplar pulp reached higher than 90% with the lignin content lower than 2%， the tear index， burst index， and tensile index of prepared paper reached 3.16 mN·m2/g， 1.03 kPa·m2/g， and 31.5 N·m2/g， respectively. |
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