The pyrolytic study was used to investigate the thermal stability of native cellulose, CNCH2SO4, and CNCCr(NO3)3. Determination of thermal properties of reinforcing materials is an important parameter in order to evaluate and identify their applicability of these cellulose nanomaterials in biocomposite applications which are always processed at high temperatures. Both TG and DTG curves were plotted and graphically presented in Figure 6 to track the thermal stability differences between native cellulose and yielded nanocellulose samples (CNCH2SO4 and CNCCr(NO3)3). In fact, DTG curves provided a more precise assessment and comparison, especially in term of maximum decomposition temperature (Tmax) value.