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| Study on Preparation of Reed CNF by DES Cooperating Pre-hydrolysis |
| Received:June 03, 2022 |
| DOI：10.11981/j.issn.1000-6842.2023.02.43 |
| Key Words:cellulose nanofibril;reed;deep eutectic solvents;pre-hydrolysis |
| Fund Project:国家自然科学基金资助项目（31971608）；辽宁省自然科学基金资助项目（2019-ZD-0125）；辽宁省“百千万人才工程”A类项目资助；辽宁省高等学校创新人才计划资助项目。 |
| Author Name | Affiliation | Postcode | | LIU Tianci* | Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials， College of Light Industry & Chemical Engineering， Dalian Polytechnic University， Dalian， Liaoning Province， 116034 | 116034 | | YANG Qian | Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials， College of Light Industry & Chemical Engineering， Dalian Polytechnic University， Dalian， Liaoning Province， 116034 | 116034 | | SONG Jiahui | Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials， College of Light Industry & Chemical Engineering， Dalian Polytechnic University， Dalian， Liaoning Province， 116034 | 116034 | | SUN Haidong | Liaoning Panjin Zhenxing Paper Co.， Ltd.， Panjin， Liaoning Province， 124112 | 124112 | | SHI Haiqiang | Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials， College of Light Industry & Chemical Engineering， Dalian Polytechnic University， Dalian， Liaoning Province， 116034 | 116034 |
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| Abstract: |
| Reed cellulose nanofibril （CNF） was prepared by using deep eutectic solvent （F-DES） combined with pre-hydrolysis. The optimum pre-hydrolysis technology was determined by analyzing the yield， extractive， and chemical components of pre-hydrolyzed reed. The pre-hydrolyzed reed and reed CNF were characterized by infrared spectrum， scanning electron microscope， particle size analysis， X-Ray diffraction， and thermogravimetric analysis. The results showed that the optimal conditions for pre-hydrolyzing reed were as follows： liquid ratio of 1∶6， pre-hydrolyzing temperature 165 ℃， and insulation time 50 min. The yield of pre-hydrolyzed reed was 80.31% and α-cellulose content was 49.62%. The crystal structure of reed cellulose did not change after pre-hydrolysis treatment， i.e.， the type Ⅰ structure was maintained. The feasible process conditions for preparing CNF from pre-hydrolyzed reed treated by F-DES system were as follows： FeCl3·6H2O dosage of 0.2 mmol/g DES， mass ratio of Oxd/ChCl 4∶1， reaction time 6 h， and temperature 80 ℃. The as-prepared CNF had homogeneous morphology and particle size ranging from 200 to 800 nm， with 90% of them distributed between 300 and 400 nm. |
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