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| Construction and Prospect of Switchable DES for Selective Extraction of Lignin from Plant Fiber |
| Received:August 31, 2022 |
| DOI：10.11981/j.issn.1000-6842.2022.04.111 |
| Key Words:deep eutectic solvent;lignin;pretreatment;selective extraction |
| Fund Project:国家自然科学基金项目（22108134）；山东省重点研发计划（2021CXGC010601，2019JZZY010326，2019JZZY010328）；山东省科教产融合创新试点工程（2022JBZ01-05，2022PY042）；泰山学者工程。 |
| Author Name | Affiliation | Postcode | | QI Letian* | State Key Lab of Biobased Material and Green Papermaking/Key Lab of Pulp & Paper Science and Technology of Education Ministry of China， Qilu University of Technology （Shandong Academy of Sciences）， Ji'nan， Shandong Province， 250353 | 250353 | | LI Debao | State Key Lab of Biobased Material and Green Papermaking/Key Lab of Pulp & Paper Science and Technology of Education Ministry of China， Qilu University of Technology （Shandong Academy of Sciences）， Ji'nan， Shandong Province， 250353 | 250353 | | YANG Guihua | State Key Lab of Biobased Material and Green Papermaking/Key Lab of Pulp & Paper Science and Technology of Education Ministry of China， Qilu University of Technology （Shandong Academy of Sciences）， Ji'nan， Shandong Province， 250353 | 250353 | | XUE Yu | State Key Lab of Biobased Material and Green Papermaking/Key Lab of Pulp & Paper Science and Technology of Education Ministry of China， Qilu University of Technology （Shandong Academy of Sciences）， Ji'nan， Shandong Province， 250353 | 250353 | | CHEN Jiachuan | State Key Lab of Biobased Material and Green Papermaking/Key Lab of Pulp & Paper Science and Technology of Education Ministry of China， Qilu University of Technology （Shandong Academy of Sciences）， Ji'nan， Shandong Province， 250353 | 250353 |
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| Abstract: |
| Deep eutectic solvent （DES） pretreatment overcomes the defects of low efficiency， great solvent loss， and severe lignin decomposition that exits in the traditional pretreatment methods for plant fiber lignin extraction. DES with strong polarity is commonly used to improve the lignin extraction efficiency. However， poor recyclability is commonly induced， due to their affinity to the hydrocarbon components. Aiming at the above problems and based on the mechanism of action and solvent properties， a novel switchable DES system with switchable polarity is proposed， which could enhance polarity during the lignin extraction process to improve the extraction efficiency， and switch to nonpolar solvent during the recycling process to improve the recyclability of DES. The switchable DES could provide a low-cost， high-efficiency， and sustainable method for lignin extraction， facilitating the development of plant fiber pretreatment technology. |
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