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Use of carbonated cellulose micro/nanofibrils in the coating of sack kraft paper

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European Journal of Wood and Wood Products Aims and scope Submit manuscript

Abstract

Coating paper with cellulose micro/nanofibrils (CMF/CNF) can improve the performance of paper packaging. However, the cost of the process is high due to the significant energy consumption during the CMF/CNF production process, which can be reduced through pre-treatment of cellulosic fibers. The objective of this work was, therefore, to evaluate the performance of CMF/CNF subjected to accelerated carbonation with different concentrations of calcium hydroxide (5% and 10% m/m) as a paper coating for packaging production in terms of spreading properties of adhesives, air permeability, and water absorption. The CMF/CNF coating was able to fill pores contained in the papers, with the treatment with 10% carbonation (CMF/CNF 10%) being the one that adhered best to the surface. There was a reduction in surface roughness from 1.35 ± 0.53 μm (uncoated paper) to 0.72 ± 0.21 μm (CMF/CNF 10%). Similarly, air permeability in the coated treatments was decreased, indicating good barrier properties and possible CO2 absorption activity in the carbonated samples. Coated papers showed greater spreading of water, PVA, and PVOH. On the other hand, the Cobb value dropped from 41.55 ± 3.83 g m2 (uncoated paper) to 26.26 ± 2.36 g m2 (CMF/CNF 10%). CMF/CNF subjected to pre-treatment with accelerated carbonation have the potential for use as a coating material, being recommended for applications in food packaging and those that will be subjected to gluing/coating processes with other materials.

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Acknowledgements

The authors would like to thank the Postgraduate Program in Biomaterials Engineering at the Federal University of Lavras (UFLA), the National Council for Scientific and Technological Development (CNPq) and the Minas Gerais Research Support Foundation (FAPEMIG).

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Lorran de Sousa Arantes: Investigation, Visualization, Data presentation, Writing – original draft. Adriano Reis Prazeres Mascarenhas: Investigation, Visualization, Data presentation, Writing – original draft. Ianca Oliveira Borges: Visualization, Data presentation, Investigation, Writing – original writing. Rafael Carvalho do Lago: Visualization, Data presentation, Research, Writing – original draft. Carlos Henrique da Silva: Visualization, Data presentation, Investigation, Writing – original draft. Murilo Daniel de Mello Innocentini: Conceptualization, Visualization, Data presentation, Writing – review and editing. Lourival Marin Mendes: Resources, Project Administration, Fundraising, Supervision. Gustavo Henrique Denzin Tonoli: Resources, Project administration, Fundraising, Supervision.

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Correspondence to Lorran de Sousa Arantes.

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Sousa Arantes, L.d., Mascarenhas, A.R.P., Borges, I.O. et al. Use of carbonated cellulose micro/nanofibrils in the coating of sack kraft paper. Eur. J. Wood Prod. (2024). https://doi.org/10.1007/s00107-024-02068-0

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  • DOI: https://doi.org/10.1007/s00107-024-02068-0

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