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Preparation of Cellulose Nanofibril from Okara Using Deep Eutectic Solvents
Received:January 11, 2021  
DOI：10.11980/j.issn.0254-508X.2021.06.005
Key Words:deep eutectic solvents  pretreatment  okara  cellulose nanofibril
Fund Project:纳米纤维素胶体凝胶调控机制及其流变特性的研究（编号：S202010708077）；陕西省教育厅重点实验室开放研究基金（编号：17JS017）；陕西科技大学的研究启动基金——微纤化纤维素的制备（编号：BJ15-29）。
Author NameAffiliationPostcode
LI Peiyi College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science and Technology， Xi’an， Shaanxi Province， 710021 710021
JIAN Boxing College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science and Technology， Xi’an， Shaanxi Province， 710021 710021
LI Xinping College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science and Technology， Xi’an， Shaanxi Province， 710021 710021
LEI Haozhe College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science and Technology， Xi’an， Shaanxi Province， 710021 710021
WANG Yumeng College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science and Technology， Xi’an， Shaanxi Province， 710021 710021
LIU Hezhen College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science and Technology， Xi’an， Shaanxi Province， 710021 710021
LIU Ruiyan College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science and Technology， Xi’an， Shaanxi Province， 710021 710021
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Abstract:Three kinds of deep eutectic solvents （DES） were prepared accordingly using choline chloride and oxalic acid （ChCl-O）， sulfamic acid and urea， choline chloride and citric acid by mixing heating method. The effects of different DES on the pretreatment of okara cellulose were discussed. The results showed that all three DES could extract okara cellulose， among which the ChCl-O system had the best pretreatment performance， with contents of holocellulose and α-cellulose of 95.8% and 92.6%， respectively. The diameter of ChCl-O pretreated okara cellulose nanofibrils （CNF） obtained after further high pressure homogenization was in the range of 27~30 nm， while the diameter of fiber obtained by the other two DES systems with further high-pressure homogenization was 0.1~0.5 μm.
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