2.8. Thermal characterization
Thermogravimetric analysis was performed to compare the
degradation characteristics of the raw wood fibers, chemicalpurified
cellulose fibers, and cellulose nanofibers obtained using
ultrasonic treatment with different output powers. The thermal
stability of each sample was determined using a thermogravimetric
analyzer (Pyris 6, PerkinElmer, USA) with a heating rate of
10 ◦C/min in a nitrogen environment.