Facile synthesis and characterization of palm cnf-zno nanocomposites with antibacterial and reinforcing properties

Supramaniam, Janarthanan and Low, Darren Yi Sern and Wong, See Kiat and Tan, Loh Teng Hern and Leo, Bey Fen and Goh, Bey Hing and Darji, Dazylah and Mohd Rasdi, Fatimah Rubaizah and Chan, Kok Gan and Lee, Learn Han and Tang, Siah Ying (2021) Facile synthesis and characterization of palm cnf-zno nanocomposites with antibacterial and reinforcing properties. International Journal of Molecular Sciences, 22 (11). ISSN 1422-0067, DOI https://doi.org/10.3390/ijms22115781.

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Cellulose nanofibers (CNF) isolated from plant biomass have attracted considerable interests in polymer engineering. The limitations associated with CNF-based nanocomposites are often linked to the time-consuming preparation methods and lack of desired surface functionalities. Herein, we demonstrate the feasibility of preparing a multifunctional CNF-zinc oxide (CNF-ZnO) nanocomposite with dual antibacterial and reinforcing properties via a facile and efficient ultrasound route. We characterized and examined the antibacterial and mechanical reinforcement performances of our ultrasonically induced nanocomposite. Based on our electron microscopy analyses, the ZnO deposited onto the nanofibrous network had a flake-like morphology with particle sizes ranging between 21 to 34 nm. pH levels between 8-10 led to the formation of ultrafine ZnO particles with a uniform size distribution. The resultant CNF-ZnO composite showed improved thermal stability compared to pure CNF. The composite showed potent inhibitory activities against Gram-positive (methicillin-resistant Staphylococcus aureus (MRSA)) and Gram-negative Salmonella typhi (S. typhi) bacteria. A CNF-ZnO-reinforced natural rubber (NR/CNF-ZnO) composite film, which was produced via latex mixing and casting methods, exhibited up to 42% improvement in tensile strength compared with the neat NR. The findings of this study suggest that ultrasonically-synthesized palm CNF-ZnO nanocomposites could find potential applications in the biomedical field and in the development of high strength rubber composites.

Item Type: Article
Funders: Advanced Engineering Platform, School of Engineering, Tropical Medicine and Biology Platform, School of Science, Universiti Malaya [FP022-2018A], Jeffrey Cheah School of Medicine and Health Sciences (JCSMHS-Monash) Strategic Grant 2021, Monash University Malaysia [SED-000068]
Uncontrolled Keywords: cellulose nanofiber; palm biomass; zinc oxide; ultrasonic; antibacterial
Subjects: Q Science > QD Chemistry
Q Science > QR Microbiology
R Medicine > R Medicine (General)
Divisions: Deputy Vice Chancellor (Research & Innovation) Office > Nanotechnology & Catalysis Research Centre
Depositing User: Ms Zaharah Ramly
Date Deposited: 01 Jun 2022 01:14
Last Modified: 01 Jun 2022 01:14
URI: http://eprints.um.edu.my/id/eprint/34471

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