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| Preparation and Properties of Sulfated CNF Based on Ternary DES System |
| Received:May 06, 2022 |
| DOI：10.11981/j.issn.1000-6842.2023.02.35 |
| Key Words:cellulose nanofibril;sulphamic acid/choline chloride/urea;deep eutectic solvents;modification |
| Fund Project:国家自然科学基金（31901267）；山东省重点研发计划（2019JZZY010326，2019JZZY010328）；山东省自然科学基金（ZR2019BC042）；山东省科教产融合创新试点工程（2020KJC-ZD14）。 |
| Author Name | Affiliation | Postcode | | MA Guangrui* | State Key Lab of Biobased Material and Green Papermaking， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353 | 250353 | | ZHANG Zhiguo | State Key Lab of Biobased Material and Green Papermaking， 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， 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， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353 | 250353 | | HE Ming | State Key Lab of Biobased Material and Green Papermaking， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353 | 250353 |
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| Abstract: |
| Cellulose nanofibers （CNF） were prepared from bleached kraft pulp fibers by the method of deep eutectic solvents （DES） system pretreatment combined with mechanical treatment. The properties of the prepared CNF were characterized by fiber quality analyzer， elemental analyzer， field-emission scanning electron microscope， atomic force microscope， Fourier transform infrared spectrometer， Zeta potential， thermal gravimetric， and multiple light scattering analyzers. The results showed that DES pretreatment not only modified fiber raw material but also swollen it， thus promoting the filamentation of fibers during the nano-homogenization process. The energy consumption of fiber raw materials homogenized without DES pretreatment was 9.49×107 kJ/kg， and those of its DES pretreated counterparts were 1.61×107~2.11×107 kJ/kg， reducing 77.8%~83.0%. DES pretreatment improved the stability of CNF suspension but impaired its thermal stability. The increase in DES pretreatment time promoted the fibrillation of fibers but reduced the polymerization degree of fibers. |
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