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| Extraction and Separation of Cellulose from Loofa Sponge with Two Types of Choline-based Deep Eutectic Solvents |
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| DOI：10.11981/j.issn.1000-6842.2018.02.6 |
| Key Words:loofa sponge; cellulose； choline-based deep eutectic solvent |
| Fund Project:国家自然科学基金项目（31370567）；江苏高校优势学科建设工程资助项目(PAPD)。 |
| Author Name | Affiliation | | SONG Yan-dan | College of Materials Science and Engineering， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 | | JI Xin-wei | College of Materials Science and Engineering， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 | | CHEN Ling | College of Materials Science and Engineering， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 | | HONG Shu | College of Materials Science and Engineering， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 | | LIAN Hai-lan* | College of Materials Science and Engineering， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 |
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| Abstract: |
| Cholin-based deep eutectic solvents （DESs）， featuring low cost， easy manufacture， nontoxicity and biodegradability， were used to extract and separate cellulose from loofa sponge. The effects of two different types of DES （i.e. ChCl-Ua DES & ChCl-Oa DES） as well as different treatment conditions （e.g. temperature & time） on the extraction and separation efficiency were studied. The results showed that ChCl-Oa acid DES had much higher extraction efficiency. The extracted cellulose content increased to 76.41%， the removal ratios of hemicellulose and lignin were up to 68.4% and 63.9% respectively for the sample treated with ChCl-Oa acid DES at 90℃ for 2.5 h. SEM images showed rougher surfaces with exposed fibers for the samples treated with both DESs when compared with the untreated ones. XRD analysis indicated that the samples were still of cellulose type Ι but with higher crystallinity after DES treatment due to the dissolving of amorphous parts such as hemicellulose， lignin and amorphous cellulose． |
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