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| Study on the Dissolution and Fractionation of Pinus Massoniana Bark in Ionic Liquid |
| Received:May 08, 2021 |
| DOI：10.11981/j.issn.1000-6842.2021.04.01 |
| Key Words:ionic liquid;Pinus massoniana bark;fractionation;lignocellulose |
| Fund Project:福建省自然科学基金（2020J01506）；制浆造纸科学与技术教育部/山东省重点实验室开放基金项目（KF201816）；福建省教育厅科技项目（JAT200011）；福州大学科研启动基金（GXRC20038）。 |
| Author Name | Affiliation | Postcode | | HUANG Jian | School of Advanced Manufacturing， Fuzhou University， Jinjiang， Fujian Province， 362200
Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education/Shandong Province， Qilu University of Technology， Ji’nan， Shandong Province， 250353
College of Environment and Resources， Fuzhou University， Fuzhou， Fujian Province， 350108 | 350108 | | ZHU Yu | School of Advanced Manufacturing， Fuzhou University， Jinjiang， Fujian Province， 362200 | 362200 | | CHEN Ruiying | College of Material Engineering， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350116 | 350116 | | LIN Chunxiang | School of Advanced Manufacturing， Fuzhou University， Jinjiang， Fujian Province， 362200
Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education/Shandong Province， Qilu University of Technology， Ji’nan， Shandong Province， 250353
College of Environment and Resources， Fuzhou University， Fuzhou， Fujian Province， 350108 | 350108 |
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| Abstract: |
| The ball-milled Pinus massoniana （Pinus massoniana L.） bark was dissolved in ionic liquid—1-allyl-3-methylimidazolium chloride （［Amim］Cl） and subsequently fractionated from the bark to cellulose， lignin， and hemicellulose using dilute alkali and ethanol solution as the precipitant. The results showed that Pinus massoniana bark could be completely dissolved in ［Amim］Cl at 100℃ for 5 h after 24 h of ball milling. After regeneration， the cellulose crystal form of the bark was changed from type I to type II with decreased crystallinity while the chemical structure of each component in the bark did not change. Cellulose， hemicellulose， and lignin could be fractionated by treating the abovementioned dissolved bark with 1% NaOH and ethanol solution with negligible change in the chemical structure of each component. After recycled and reused for 5 times， the ionic liquids maintained a recovery rate above 90%. |
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