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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)。 |
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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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