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Green extraction of natural antibacterial cellulose-based nanofibers from pine cone

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Abstract

Nanocellulose-based antibacterial materials, which hold excellent biocompatibility and dispersion stability, are attractive candidates to replace traditional antibacterial materials in blocking the spread of bacteria. However, environmentally polluting and complex preparation processes hinder the development of antibacterial nanocellulose. Herein, we propose a simple and green strategy for extracting natural antibacterial cellulose-based nanofibers (P-CNFs) from pine cones by directly thermo-oxidizing natural pine cones with H2O2. The obtained nanofibers possess strong antibacterial properties against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) by residual lignin and rosin. Furthermore, the minimum inhibitory concentration (MIC) of E. coli and S. aureus was as low as 1.5 and 2 mg mL−1, respectively. More surprisingly, benefiting from the residual lignin and rosin, P-CNFs could be well dispersed in ethanol. P-CNF/ethanol suspension could be regarded as a disinfectant with long residual action, which could resist the secondary infection of bacteria. The green preparation and excellent properties of P-CNFs made them viable candidates as environmentally friendly antibacterial materials. This work provided a new idea for preparing functional natural, sustainable nanomaterials.

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The datasets used or analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgments

This project was supported by the National Natural Science Foundation of China (52103045), Natural Science Foundation of Zhejiang Province of China (LQ21E030015), the Scientific Research Project of Department of Education of Zhejiang Province (19010035-F) and the Scientific Research Project of Longgang Institute of Zhejiang Sci-Tech university (LGYJY2021007).

Funding

This project was supported by the National Natural Science Foundation of China (52103045), Natural Science Foundation of Zhejiang Province of China (LQ21E030015).

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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by XC and YW. Validation, supervision and review were performed by YL. The first draft of the manuscript was written by XC and all authors commented on previous versions of the manuscript. Resources and data curation were performed by FT, MM and JT. All authors read and approved the final manuscript.

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Correspondence to Yingzhan Li.

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Chen, X., Li, Y., Wang, Y. et al. Green extraction of natural antibacterial cellulose-based nanofibers from pine cone. Cellulose 30, 6219–6232 (2023). https://doi.org/10.1007/s10570-023-05261-1

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  • DOI: https://doi.org/10.1007/s10570-023-05261-1

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