TEMPO-oxidized nanocellulose films derived from coconut residues: Physicochemical, mechanical and electrical properties

Hassan, S. H. and Velayutham, Thamil Selvi and Chen, Y. W. and Lee, Hwe Voon (2021) TEMPO-oxidized nanocellulose films derived from coconut residues: Physicochemical, mechanical and electrical properties. International Journal of Biological Macromolecules, 180. pp. 392-402. ISSN 0141-8130, DOI https://doi.org/10.1016/j.ijbiomac.2021.03.066.

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The present work focuses on the development of cellulose nanofibrils (CNF) film that derived from sustainable biomass resources, which potentially to work as bio-based conductive membranes that assembled into supercapacitors. The chemically purified cellulose was isolated from different parts of coconut (coconut shell and its husk) and further subjected to 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)-mediated oxidation for CNF preparation. Physicochemical properties of prepared CNFs were studied in terms of chemical characteristics & crystallinity, surface functionalities, surface morphology, and thermal properties. Both coconut shell derived CNF and coconut husk-derived CNF fulfilled with nanocellulose's characteristics with fibres width ranged of 70-120 nm and 150-330 nm, respectively. CNF films were further prepared by solvent casting method to measure the modulus elasticity, piezoelectric and dielectric properties of the films. Mechanical study indicated that coconut shell-derived CNF film showed a higher value of elastic modulus than the coconut husk-derived CNF film, which was 8.39 GPa and 5.36 GPa, respectively. The effectiveness of electrical aspects for CNF films are well correlated with the crystallinity and thermal properties, associated with it's composition of different coconut's part. (c) 2021 Elsevier B.V. All rights reserved.

Item Type: Article
Funders: Ministry of Higher Education (MOHE)-Prototype Research Grant Scheme, Malaysia (PR002-2020A), Universiti Malaya (IIRG002A-2020IISS)
Uncontrolled Keywords: Biomaterial; Biomass; Nanocellulose; Physicochemical properties; Piezoelectric effect
Subjects: Q Science > QD Chemistry
Q Science > QH Natural history > QH301 Biology
Divisions: Faculty of Science > Department of Physics
Deputy Vice Chancellor (Research & Innovation) Office > Nanotechnology & Catalysis Research Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 08 Apr 2022 01:08
Last Modified: 08 Apr 2022 01:08
URI: http://eprints.um.edu.my/id/eprint/26673

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