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Multidirectional permeability simulation for fiber network based on the pore structure 3D characterization by CT scanning

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Abstract

Understanding the pore structure of paper and its permeability behavior is important for designing paper-based materials. In this study, the three-dimensional structure of paper was investigated using X-ray computed tomography, and the representative elementary volume (REV) was determined to be 400 × 400 × 450 pixels by the porosity criterion. The pore structural parameters of the REV were experimentally validated. Permeability simulations were carried out in the thickness direction (perpendicular to the paper plane, denoted as the Z direction), horizontal direction (any direction of the paper plane, denoted as the X–Y plane), double outlet, and triple outlet conditions. The simulated permeability in the thickness direction (1.69 µm2) was very close to the experimental value (1.88 µm2). The calculated permeability in the horizontal direction (8.38 µm2) was much greater than that in the thickness direction, revealing that the paper had a high pore connectivity and large pore size in the horizontal direction, giving it a high permeability. Compared with the single outlet case, in the case of the double and triple outlet boundary conditions, more fluid flowed out from the side outlets, and the internal pressure declined faster. This study provides an approach for the structural design and performance optimization of paper-based materials.

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Acknowledgments

The authors are thankful for the research assistance provided by Qilu University of Technology, Jinan, P. R. China.

Funding

The authors appreciate the supports provided by National Key Research and Development Program of China (2022YFF0607201), National Natural Science Foundation of Guangdong Province, China (2023A1515011422), Project to Attract Foreign Experts by MOST (G2022163012L), and Science and Technology Program of Guangzhou, China (202201010481).

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Yi Wang: Investigation, Data curation, Writing-original draft. Yin Liu: Investigation, Writing-review. Jiaxian Chen: Writing-review. Jie Xu: Investigation, Resources. Wenhao Shen: Validation, Supervision, Conceptualization, Writing-review and editing. Jean-Pierre Corriou: Methodology, Writing-review.

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Correspondence to Wenhao Shen.

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Wang, Y., Liu, Y., Chen, J. et al. Multidirectional permeability simulation for fiber network based on the pore structure 3D characterization by CT scanning. Cellulose 31, 187–203 (2024). https://doi.org/10.1007/s10570-023-05645-3

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  • DOI: https://doi.org/10.1007/s10570-023-05645-3

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