journal article·2026-03-31

Permeability simulation for filled paper based on three-dimensional structural model developed by X-ray computed tomography scanning

JIAXIAN CHEN, YI WANG, YIN LIU, LI CHEN, WENHAO SHEN, JAAN-WILLEM SIMON, YAN HUANG

TAPPI Journal· Volume 25· Issue 3
Publisher page

Abstract

In this study, an in-depth exploration of filled paper was conducted to understand its structural and permeability characteristics. Cotton linter pulp and precipitated calcium carbonate (PCC) filler were utilized to prepare pure fiber paper, and PCC1 and PCC2 filled papers with different filler particle sizes. Then, the pore structure parameters of paper samples were characterized by mercury intrusion porosimetry, and the X-ray computed tomography (X-CT) scanning was carried out. Subsequently, the 3D microstructures were established based on the X-CT slice images, and the filler characteristic parameters and filler 3D distribution were quantitatively analyzed. Finally, permeation simulations in the thickness and horizontal directions were performed. The findings indicate that filling changes the paper porosity, and the pore tortuosity varies with direction. The estimated pore•throat radius distribution shows specific patterns for different papers. The fillers have different distribution characteristics in the paper samples. Moreover, the paper permeability differs with direction, with smallsized filler having a significant impact on fluid penetration in the thickness direction. Overall, this study provides an effective method for investigating internal paper filler and its distribution, which contributes to the understanding of paper structure•performance relationships.
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Research context

OpenAlex topics: Material Properties and Processing · Advanced Cellulose Research Studies · Power Transformer Diagnostics and Insulation

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

South China University of Technology

Guangzhou Vocational College of Science and Technology

University of Wuppertal

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