Biosynthesis of thin film derived from microbial chitosan for piezoelectric application

Amran, Anisah and Ahmad, Farah and Akmal, Mohd Hatta Maziati and Ralib, Aliza Aini Md and Bin Suhaimi, Muhammad Irsyad (2021) Biosynthesis of thin film derived from microbial chitosan for piezoelectric application. Materials Today Communications, 29. p. 102919. ISSN 2352-4928, DOI

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The aim of this paper was to synthesize and characterize microbial chitosan thin films for potential piezoelectric application. Microbial chitosan was derived from the Aspergillus oryzae fungus via extraction and deacetylation. Chitosan thin film was characterized for its surface morphology, chemical properties, tensile strength, and surface topography. For the potential application of chitosan as a piezoelectric material, its piezoelectric characteristics were presented in terms of its electromechanical coupling coefficient and piezoelectric coefficient. The fabrication of the chitosan thin films was optimized via the one-factor-at-a-time (OFAT) method, where the parameters were type of acid solvent, acid concentration and mixing time. The chitosan film prepared using formic acid at a concentration of 0.25 M for 3 h of mixing time had the highest tensile strength (129.29 MPa), electromechanical coupling factor (0.0045), and piezoelectric coefficient d31 (10 pC/N). The results obtained, from the optimized fabrication of the chitosan thin film, were validated against fungal chitosan, and it was shown that the properties of the thin film were comparable to those of commercial PVDF thin films. Therefore, the prospect of using microbial chitosan thin film as wearable piezoelectric energy harvester or nano-generator is promising. © 2021 Elsevier Ltd

Item Type: Article
Funders: Higher Education Malaysia for Fundamental Research Grant Scheme (FRGS) ( FRGS/1/2019/TK02/UIAM/02/3 )
Additional Information: Affiliation: Farah B. Ahmad (Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia)
Uncontrolled Keywords: Aspergillus oryzae; Chitosan; Deacetylation; Fungi; Piezoelectric; Thin film
Subjects: T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 29 Dec 2021 04:16
Last Modified: 29 Dec 2021 04:16

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