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Polydopamine nanocoating on cellulose nanofiber film and its multifunctional behaviors

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Abstract

This paper presents a simple and upscalable method for enhancing and imparting multifunctionalities onto cellulose nanofiber (CNF) films through nanocoating with polydopamine (PDA). Leveraging a simple two-step process of dopamine seeding and PDA polymerization in mild alkaline Tris–HCl, a uniform and stable PDA nanocoating was successfully formed on the CNF film surface. The resulting PDA-coated CNF films (PDA–CNF) were then thermally annealed at 160 °C to further enhance their multifunctionality. Our results show that the PDA nanocoating profoundly enhanced the films’ UV-shielding properties, Young’s modulus, dielectric properties, and antioxidant activity. FTIR spectra analysis confirmed successful PDA formation onto the CNF surface, and atomic force microscopy revealed a homogenous distribution of nanometer-sized PDA oligomers (~ 170 nm) on the film surface. Moreover, we demonstrated the use of thermally annealed PDA–CNF film as an ascorbic acid detecting electrode, which showed a linear electrochemical response with high stability and excellent reproducibility. These findings contribute to the expanding knowledge of CNF films and their potential as a promising material for various applications.

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Funding

The National Research Foundation of Korea supported this research through the Creative Research Initiatives Program (NRF-2015R1A3A2066301).

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Conceptualization, JK and RMM; Data curation and experiments, PSP; Writing—original draft preparation, RMM; Visualization, DOA; Writing— review and editing, JK; Supervision, JK. All authors have approved the final version of the manuscript. The manuscript was written through the contributions of all authors. All authors have approved the final version of the manuscript.

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Correspondence to Jaehwan Kim.

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Muthoka, R.M., Panicker, P.S., Agumba, D.O. et al. Polydopamine nanocoating on cellulose nanofiber film and its multifunctional behaviors. Cellulose 31, 887–906 (2024). https://doi.org/10.1007/s10570-023-05658-y

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  • DOI: https://doi.org/10.1007/s10570-023-05658-y

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