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Fenton-like oxidation of pinewood to produce cellulose nanoparticles in one pot treatment

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Abstract

The conventional production of nanocellulose from biomass demands multiple steps involving numerous chemicals like corrosive acids, bases, halogenated bleaching agents, and mechanical energy. This research aims to find a greener approach to producing nanocellulose particles from biomass. In nature, the brown rot fungi utilize iron complex and hydrogen peroxide to overcome the lignin boundary and approach cellulose in biomass. This fact encouraged us to use the same oxidative catalytic system on biomass in a one-pot process. Pinewood sawdust was taken as starting material, and the iron oxide, hydrogen peroxide oxidation system was applied with varying the concentration of hydrogen peroxide and the reaction time. In 6 h, a one-pot system obtained a 95% pure cellulose with an aspect ratio of 1–15 from pinewood sawdust. The yield of the process was very high, i.e., from the total cellulose content in pinewood, 85% of cellulose was recovered in this process. The degree of polymerization of the obtained cellulose product was 100 ± 20, with an aspect ratio of 1–20. The particles were sphere and ellipsoidal-shaped, with the majority having a diameter of 120–180 nm. It had a crystallinity of 81%, an increase of 26% crystallinity was observed compared to the untreated pinewood sawdust. These nanocellulose particles would be a promising material for different derivatizing reactions, with their high surface area (15.0 ± 0.5 m2/g) and low degree of polymerization. This developed one-pot process has avoided using hazardous chemicals to produce nanocellulose particles.

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The data supporting this study's findings are available in this article's supporting information. In addition, other raw experimental data is available on request.

Abbreviations

NC:

Nanocellulose

Fe2O3/H2O2 :

Iron oxide-hydrogen peroxide catalytic system

BEK cellulose:

Bleached eucalyptus kraft cellulose

RB flask:

Round-bottomed flask

DI water:

Deionized water

NREL:

National renewable energy laboratory

SEM:

Scanning electron microscopy

DP:

Degree of polymerization

CED:

Cupriethylenediamine solution

XRD:

X-ray diffraction

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Acknowledgements

The authors gratefully acknowledge the funding of the Australian Research Council (ARC) and Processing Advance Lignocellulosics (PALS) [grant number- IH170100020]. The authors also acknowledge the Monash school of chemistry, Monash X-ray Platform, and Monash Centre for Electron Microscopy to use facilities.

Funding

This work was supported by funding of the Australian Research Council (ARC) and Processing Advance Lignocellulosics (PALS) [grant number- IH170100020].

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All authors contributed to the study's conception and design. Material preparation, data collection and analysis were performed by PV, VR, JM. The first draft of the manuscript was written by PV and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Kei Saito.

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Vijay, P., Raghuwanshi, V.S., Ma, J. et al. Fenton-like oxidation of pinewood to produce cellulose nanoparticles in one pot treatment. Cellulose 31, 953–967 (2024). https://doi.org/10.1007/s10570-023-05573-2

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  • DOI: https://doi.org/10.1007/s10570-023-05573-2

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