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Antibacterial biocomposites: efficacy of MWCNT-coated Hanji cellulose paper against E. coli

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Abstract

Cellulose paper has been studied for its application as an antibacterial filter, due to its robust porous structure, minimal ecological footprint, biocompatibility, and inherent antibacterial properties. Moreover, its properties can be further enhanced via surface functionalization with metallic nanoparticles (NPs) such as silver, zinc, etc. However, the synthesis of metallic NPs is challenging, costly, and environmentally harmful. On the other hand, carbon nanotubes (CNTs) are highly suitable as an additive to cellulose paper due to their high electrical conductivity, excellent mechanical strength, ease of fabrication, and antibacterial properties. In this study, we coated multi-walled carbon nanotubes (MWCNTs) on Hanji, a traditional Korean paper, using a simple dipping method and investigated its antibacterial activity against Escherichia coli (E. coli). The MWCNT-coated Hanji exhibited an inhibition efficiency of ~ 93% against E. coli cells. Moreover, the MWCNT coating resulted in improved mechanical strength, enhanced electrical conductivity, and increased hydrophobicity of the Hanji. Furthermore, it was observed that MWCNTs exhibited exceptionally stable adhesion to the Hanji surface. Our finding shows that MWCNT-coated Hanji could be utilized as an antibacterial material that is used as masks, air pollution filters, and wallpapers in hospitals and residential complexes, and an efficient platform for antiviral studies.

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Acknowledgments

The authors would like to express their gratitude to Korea Institute of Science and Technology (KIST), National Research Foundation of Korea (NRF), Korea Institute for Advancement of Technology (KIAT), Korea Research Institute for defense Technology planning and advancement (KRIT), and National Research Council of Science & Technology (NST) of Republic of Korea.

Funding

This work was supported by the Nano & Material Technology Development Program through the National Research Foundation of Korea (NRF) funded by Ministry of Science and ICT (2021M3H4A6A03103770), Korea Institute for Advancement of Technology (KIAT) through the International Cooperative R&D program (P0019625), the National Research Council of Science & Technology (NST) funded by the Korea government (MSIT) (No. CRC-20-01-NFRI), Korea Research Institute for defense Technology planning and advancement (KRIT) grant funded by the Korea government (DAPA (Defense Acquisition Program Administration)) (No. KRIT-CT-21-014, BNNT Composites for Space and Military Applications Research Laboratory, 2021), the KIST Institutional Program (Project No. 2Z07054), and the NRF grant funded by the Korean government (NRF-2019R1A2C1088541), and Learning & Academic research institution for Master’s·PhD students, and Postdocs (LAMP) Program of the NRF grant funded by the Ministry of Education (No. RS-2023-00301938).

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Conceptualization, Methodology, Investigation, Writing - original draft was performed by MA and YJ. Methodology, Investigation, Writing - review & editing was performed by SS. Methodology and Investigation was performed by BK and NK. Resources, Investigation, Writing - review & editing was performed by HC. Formal analysis, Investigation, Writing - review & editing was performed by SL and WN. Resources, Investigation, Writing - review & editing by was performed by SJ. Conceptualization, Methodology, Investigation, Funding acquisition, Validation, Writing - review & editing, Supervision was performed by EL and JS.

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Correspondence to Eun-Hee Lee or Jangyup Son.

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Amjad, M., Jeong, Y., Shin, S. et al. Antibacterial biocomposites: efficacy of MWCNT-coated Hanji cellulose paper against E. coli. Cellulose (2024). https://doi.org/10.1007/s10570-024-05879-9

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  • DOI: https://doi.org/10.1007/s10570-024-05879-9

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