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Bio-based waterborne polyester/cellulose nanofiber-reduced graphene oxide–zinc oxide nanocomposite: an approach towards sustainable mechanically robust anticorrosive coating

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Abstract

The protection of metal surfaces from corrosion by sustainable polymeric coatings is an interesting research topic. Herein, an environmentally benevolent fabrication of a bio-based waterborne polyester nanocomposite is presented, as a mechanically tough anticorrosive organic coating using cellulose nanofiber-reduced graphene oxide-zinc oxide nanohybrid as the reinforcing agent in the polymer matrix. The nanohybrid was prepared by a one-pot facile hydrothermal method. This nanohybrid was incorporated into the polyester matrix at different loadings. The prepared nanohybrid and the nanocomposites were characterized by different spectroscopic and microscopic techniques. The thermosets of the prepared nanocomposites exhibited excellent anticorrosion activity on metal surfaces with ~ 99.5–99.9% corrosion protection efficiency, as confirmed from the electrochemical corrosion studies. Further, the fabricated thermosets were also found to be transparent in visible light, mechanically tough, thermally stable; and showed good UV aging and chemical resistance. Thus, the fabricated thermosetting nanocomposites have enormous potential as mechanically tough sustainable anticorrosive coating materials.

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Fully bio-based waterborne polyester/cellulose nanofibers-reduced graphene oxide-ZnO nanocomposite was fabricated as a sustainable and mechanically robust anticorrosive material via a benign route.

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Acknowledgments

The authors express their gratitude to NEIST, Jorhat for FESEM, TEM and XPS analysis; SAIF-NEHU, Shillong for TEM analysis and Sophisticated Analytical Instrumentation Centre (SAIC), Tezpur University for helping in instrumental analyses.

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The manuscript was written through contributions of all authors. All authors have given approval to the final version of the manuscript.

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Correspondence to Niranjan Karak.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Dutta, G.K., Karak, N. Bio-based waterborne polyester/cellulose nanofiber-reduced graphene oxide–zinc oxide nanocomposite: an approach towards sustainable mechanically robust anticorrosive coating. Cellulose 29, 1679–1703 (2022). https://doi.org/10.1007/s10570-021-04414-4

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  • DOI: https://doi.org/10.1007/s10570-021-04414-4

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