Optimization And Thermal Degradation Kinetics Of Cellulose Nanoparticles (CNPs) Production From Coconut Fiber
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Date
2021-06
Authors
Tim, Mau Sean
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
Optimization and thermal degradation kinetics of the cellulose nanoparticles (CNPs)
production from coconut fibers were presented in this research project. The research project
was carried out by using the data collected from the thesis with the title of ‘Dissolution of
Natural Fiber using Ionic Liquid for Production of Cellulose Nanoparticles’ by Nadzirah binti
Yahya. For optimization part, the CNPs production from coconut fibers was simulated using
the Response Surface Methodology (RSM) via Central Composite Design (CCD) in Design
Expert software to determine the relationship between the affecting parameters (extraction
time, extraction temperature and ratio of coconut fiber (CF) to ionic liquid (IL)) on the response
(ultrafine CNPs distribution). The simulation results showed that both the extraction
temperature and CF:IL ratio were more significant to the regression model. The maximum
ultrafine CNPs distribution obtained through the optimization process was 58.074 %, under the
operating conditions of 30 mins of extraction time, 69.518 °C of extraction temperature and
0.01 w/w of CF:IL ratio. For the thermal degradation kinetics study of CNPs produced from
coconut fibers, both the model-free isoconversional Kissinger-Akahira-Sunose (KAS) and
Flynn-Wall-Ozawa (FWO) methods were used to determine the activation energy, Ea of the
CNPs. However, the calculated results of Ea were not satisfied, which were ranged from -0.039
to -3.134 kJ/mol. The values deviated very much from the Ea value of common CNPs, and the
possible source of error was predicted to be from the inaccurate results from the collected data.