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Preparation of Nanocellulose Films from Corn Straw Furfuryl Residue |
Received:September 24, 2021 |
DOI:10.11980/j.issn.0254-508X.2022.04.009 |
Key Words:corn straw furfuryl residue acid hydrolysis TEMPO oxidation ultrasound method nanocellulose film |
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Abstract:In this study, the nanocellulose (CFR-CNC, CFR-CNF and CFR-TNC) were obtained by three methods: acid hydrolysis, ultrasonication and TEMPO (2,2,6,6-tetramethylpiperidine oxide) oxidation, respectively. The microscopic morphology, crystallinity, thermal stability and chemical structure of the films from corresponding nanocellulose were characterized, and the morphological and mechanical properties were also compared. The results showed that the three nanocelluloses had different aspect ratios (29.2, 163.7, 132.2) and crystallinity (62.5%, 52.8%, 43.9%). The infrared spectra showed that the cellulose molecular structure of the three nanocelluloses didn't change, and CFR-TNC successfully introduced carboxyl groups. Among the three nanocellulose films, the CFR-CNF film had higher tensile strength (36.6 MPa), the CFR-CNC film had better resistance to deformation, and all films had good transparence. |
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