Preparation and characterization of the spherical nanosized cellulose by the enzymatic hydrolysis of pulp fibers
| Autor: | Wenhao Shen, Xiaoquan Chen, Meng-Yu Jia, Xueyan Deng |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Flocculation
Time Factors Polymers and Plastics 02 engineering and technology Cellulase engineering.material 010402 general chemistry Spectrum Analysis Raman 01 natural sciences chemistry.chemical_compound Enzymatic hydrolysis Polymer chemistry Materials Chemistry Hemicellulose Cellulose Particle Size Endo-1 4-beta Xylanases biology Pulp (paper) Hydrolysis Organic Chemistry Temperature 021001 nanoscience & nanotechnology Wood 0104 chemical sciences chemistry Chemical engineering engineering biology.protein Xylanase Nanoparticles Particle size 0210 nano-technology |
| Zdroj: | Carbohydrate polymers. 181 |
| ISSN: | 1879-1344 |
| Popis: | In this work, the pulp fibers were enzymolyzed to prepare the nanosized cellulose (NC). The as-prepared samples were characterized by optical microscopy, electron microscopy, and Raman spectra. The experimental results indicated that enzymatic hydrolysis of pulp fibers could produce the spherical NC with a mean particle size of about 30nm, which had the excellent monodispersity and uniformity. When the concentration of complex enzymes was 20u/mL (cellulase: xylanase=9: 1), the yield of NC was 13.6%. The single cellulase was used, even if the enzyme concentration reached up to 200u/mL, only a mixture of strip and granular flocculation were obtained. The positive synergistic effect between xylanase and cellulase could be due to the enzymolysis of hemicellulose located on the cellulose microfibers to be favorable of cutting and splitting of the microfibers by the endoglucanase in cellulase. |
| Databáze: | OpenAIRE |
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