| 초록 |
Crystalline and thermal properties of cellulose nanofibers were analyzed by X-ray diffraction, FTIR spectroscopy and thermo-gravimetric analyzer (TGA). Cellulose nanofibers were prepared by hydrolysis of cotton pulp with sulfuric acid. Transformation from cellulose Ⅰ to cellulose Ⅱ was observed by X-ray diffraction for cellulose nanofibers. The FTIR spectral analysis showed significant differences in the absorbance of the bands at 3488, 3447 and 3175cm-1 between the cotton pulp and cellulose nanofibers. These absorption bands are typical of the -OH stretching intermolecular hydrogen bonds present in the crystalline cellulose Ⅱ. On the other hand, the thermal degradation of hydrolyzed cellulose nanofibers showed lower thermal degradation temperature and higher amount of carbon-rich char. The studies will be focused on using these cellulose nanofibers as reinforcements in biocomposite and improvement of the thermal degradation temperature of the cellulose nanofibers. |
