Isolation of High-Purity Cellulose Nanofibers from Wheat Straw through the Combined Environmentally Friendly Methods of Steam Explosion, Microwave-Assisted Hydrolysis, and Microfluidization
| Autor: | Nicolas Jacquet, Qi Liu, Canbin Ouyang, Dorothée Goffin, Wenqing He, Changrong Yan, Yun Lu, Song Jiqing, Mario Aguedo, Aurore Richel, Guo Rui, Wen-Bo Bai |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment General Chemical Engineering 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Crystallinity Cellulose fiber chemistry Chemical engineering Nanofiber Polymer chemistry Environmental Chemistry Lignin Hemicellulose Cellulose Fourier transform infrared spectroscopy 0210 nano-technology Steam explosion |
| Zdroj: | ACS Sustainable Chemistry & Engineering. 5:6183-6191 |
| ISSN: | 2168-0485 |
| Popis: | High-purity cellulose nanofibers were isolated from wheat straw through an environmentally friendly, multistep treatment process that combined steam explosion, microwave-assisted hydrolysis, and microfluidization. The cellulose content of the processed nanofibers increased from 44.81% to 94.23%, whereas the hemicellulose and lignin contents significantly decreased. Scanning electron microscopy revealed the effects of the isolation treatments on fiber morphology and width. Atomic force microscopy was used to observe the changes in the components, surface roughness, and crystallinity of the fibers. Transmission electron microscopy showed long, loose nanofiber bundles that were 10–40 nm wide with an average individual diameter of 5.42 nm. Fourier transform infrared spectroscopy showed that noncellulosic components were effectively removed. X-ray diffraction analysis revealed the improved crystallinity of the processed fibers, as well as the partial crystalline transformation of cellulose I to cellulose II. T... |
| Databáze: | OpenAIRE |
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