CaCO3 | calcium carbonate |
HCl | hydrochloric acid |
NaOH | sodium hydroxide |
FTIR | Fourier-transform infrared |
13CP/MAS-NMR | 13C cross-polarization magic-angle-spinning nuclear magnetic resonance |
DDA | degree of deacetylation |
H NMR | hydrogen nuclear magnetic resonance |
IR | infrared |
XRD | X-ray diffraction |
SEM | scanning electron microscope |
TGA | thermogravimetric analysis |
DTGmax | maximal decomposition rate |