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| Preparation of Cellulose Nanofibrils by Oxidation of Potassium Permanganate from Hardwood Pulp |
| Received:November 28, 2023 Revised:December 13, 2023 |
| DOI：10.11981/j.issn.1000-6842.2024.03.78 |
| Key Words:bleached hardwood kraft pulp （BHKP）;oxidation of potassium permanganate;cellulose nanofibers |
| Fund Project:国家自然科学基金（22378247）；生物质化学与材料国际联合研究中心（2018GHJD-19）；陕西省重点产业创新链项目（2020ZDLGY11-03）；中国-中东欧国家高校联合教育项目（2021099）。 |
| Author Name | Affiliation | Postcode | | ZHANG Sufeng* | College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 | 710021 | | DENG Tingting | College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 | 710021 | | LI Nan | College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 | 710021 | | LI Lei | College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 | 710021 | | DING Hao | College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 | 710021 | | ZHU Xinyue | College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 | 710021 |
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| Abstract: |
| In this study， carboxylated cellulose nanofibers were successfully prepared by KMnO4 oxidation pretreatment combined with low-energy and high-pressure homogenization using bleached hardwood pulp as raw material. The effects of oxidation time on the morphology， size， yield， chemical structure， Zeta potential， crystallinity， and other parameters of carboxylated cellulose nanofibers were explored. The results showed that the yield of carboxylated cellulose nanofibers with aspect ratio of 375 nm prepared by oxidation reaction for 1 h was as high as to 97.3%， and Zeta potential was -22.5 mV. The initial thermal decomposition temperature was higher than 293.2 ℃， and it had good dispersion stability and thermal stability. The thin film of carboxylated cellolose nanofibers prepared by vacuum filtration had excellent mechanical properties （maximum tensile strength was 85.49 MPa） and high light transmittance （up to 88.1%）. |
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