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| Effect of Low-intensity Ultrasonic Enhanced Acid Hydrolysis on Size Distribution of Nanocellulose |
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| DOI：10.11981/j.issn.1000-6842.2019.04.21 |
| Key Words:nanocellulose crystals; low-intensity ultrasonic; acid hydrolysis; uniform size |
| Fund Project:陕西省自然科学基础研究计划（2018JM2034）；咸阳市科技计划项目（2017k0220）。 |
| Author Name | Affiliation | | LIN Tao | College of Bioresources Chemical and Materials Engineering,National Demonstration Center for Experimental Light Chemistry Engineering Education
Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper, Shaanxi University of Science and Technology, Xi’an, Shaanxi Province, 710021 | | LI Jing | College of Bioresources Chemical and Materials Engineering,National Demonstration Center for Experimental Light Chemistry Engineering Education
Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper, Shaanxi University of Science and Technology, Xi’an, Shaanxi Province, 710021 | | YIN Xuefeng | College of Bioresources Chemical and Materials Engineering,National Demonstration Center for Experimental Light Chemistry Engineering Education
Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper, Shaanxi University of Science and Technology, Xi’an, Shaanxi Province, 710021 | | ZHANG Dingjun | College of Bioresources Chemical and Materials Engineering,National Demonstration Center for Experimental Light Chemistry Engineering Education
Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper, Shaanxi University of Science and Technology, Xi’an, Shaanxi Province, 710021 | | DUAN Min | College of Bioresources Chemical and Materials Engineering,National Demonstration Center for Experimental Light Chemistry Engineering Education
Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper, Shaanxi University of Science and Technology, Xi’an, Shaanxi Province, 710021 |
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| Abstract: |
| Nanocellulose crystals (NCC) were prepared by low-intensity ultrasonic enhanced acid hydrolysis of cotton fibers. The effects of ultrasonic power, reaction time, reaction temperature and sulfuric acid concentration on the average particle size distribution of NCC were investigated. The surface morphology and crystal structure of NCC were characterized by atomic force microscopy (AFM), scanning electron microscopy (SEM) and X-ray diffractometer (XRD). The results indicated that under the conditions of ultrasonic power 240 W, reaction time 75 min, reaction temperature 50℃, sulfuric acid concentration 60%, the NCC was short rod-shaped, the yield was 51.2% and the particle length in 100~300 nm was accounted for 86.9% of the total distribution, the average diameter was about 20 nm. It was celluloseⅠwith a crystallinity of 87.8%. |
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