Comparative Kinetic Study of the Thermal Decomposition of Nanocellulose Produced by H_2SO_4 Hydrolysis, TEMPO, and AVAP® Processes

摘要

1.E_a and A factor for the thermal decomposition of several CNCs and CNFs have been determined by TGA. 2.The lower A factor for the AVAP CNCs and CNFs relative to the CNCs and CNFs prepared by the H_2SO_4 and TEMPO processes, respectively, more than compensates for the lower E_a of decomposition as determined by TGA, thus leading to higher thermal stability of the AVAP CNCs and CNFs. 3.Degree of crystallinity and crystal quality may play a major role in deterring thermal stability of CNCs and CNFs. 4.Cellulose crystals may be disrupted by incorporation of sulfate esters or carboxylate groups. 5.X-ray Diffraction (XRD) analysis is being carried out to determine the degree of crystallinity and the crystal quality of these CNCs and CNFs.