3D pore structure characterisation of paper

Axelsson, Maria; Svensson, Stina

doi:10.1007/s10044-009-0146-1

Cited by 30 publications

(20 citation statements)

References 26 publications

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“…[36,38] Taken together, we hypothesize that in our method fibronectin acts more like a lubricant to enhance the cell release from the paper, which is associated with their shortlength (<1 min) cell-substrate bond strengths. [29,31,38,39] In addition, we assume that the highly (>50 µm) 3D porous structure of the paper [22,40] also enhances the release of cells upon shear.…”

Section: Discussionmentioning

confidence: 99%

Paper‐Based Cell Cryopreservation

et al. 2020

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The continuous development of simple and practical cell cryopreservation methods is of great importance to a variety of sectors, especially when considering the efficient short‐ and long‐term storage of cells and their transportation. Although the overall success of such methods has been increased in recent years, there is still need for a unified platform that is highly suitable for efficient cryogenic storage of cells in addition to their easy‐to‐manage retrieval. Here, a paper‐based cell cryopreservation method as an alternative to conventional cryopreservation methods is presented. The method is space‐saving, cost‐effective, simple and easy to manage, and requires no additional fine‐tuning to conventional freezing and thawing procedures to yield comparable recovery of viable cells. It is shown that treating papers with fibronectin solution enhances the release of viable cells post thawing as compared to untreated paper platforms. Additionally, upon release, the remaining cells within the paper lead to the formation and growth of spheroid‐like structures. Moreover, it is demonstrated that the developed method works with paper‐based 3D cultures, where preformed 3D cultures can be efficiently cryopreserved.

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Section: Discussionmentioning

confidence: 99%

Paper‐Based Cell Cryopreservation

et al. 2020

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“…This fundamental repeating unit has often been referred to as representative elementary volume (REV), and by assessing the properties of various REV geometries, it is possible to scale the transport properties of the entire porous media . The pore structure of paper is complex and presents significant interconnectivity, as exemplified by the reconstruction of paper using synchrotron beam radiations CT reported in literature . Despite the advantages in terms of resolution of acquisition of synchrotron CT, conventional CT set‐up is widely used and constantly improved.…”

Section: Introductionmentioning

confidence: 99%

“…20,21 The pore structure of paper is complex and presents significant interconnectivity, as exemplified by the reconstruction of paper using synchrotron beam radiations CT reported in literature. [22][23][24][25][26][27] Despite the advantages in terms of resolution of acquisition of synchrotron CT, conventional CT set-up is widely used and constantly improved. It was in fact used among others by Wernersson et al, 28 Sharma et al, 29 Miettinen et al, 30 and Saxena et al 19 With the purpose of setting a step towards in the standardization of design and testing practices of eco-friendly packaging, this work focused on the characterization of the thermoforming process of moulded pulp products and their characteristics.…”

Section: Introductionmentioning

confidence: 99%

Moulded pulp products manufacturing with thermoforming

Didone

Tosello

2018

Packag Technol Sci

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Over the past years, eco‐friendly packaging solutions such as moulded pulp have resonated with a growing number of consumers. Among all of them, the thermoformed products make use of the most recent manufacturing approach that produces high‐quality, thin‐walled items. However, it remains an underresearched area, and the development of an efficient and precise manufacturing process is fundamental in order to increase the implementation of sustainable packaging. With the purpose of setting a step towards in the standardization of design and testing practices of eco‐friendly packaging, this work focused on the characterization of the thermoforming process of moulded pulp products and their characteristics. Three different analyses were carried out for this purpose, covering the dewatering efficiency of the process, a quantification of the moulding geometrical accuracy, and an analysis of the internal microstructure of the parts. Experimental results and statistical analysis show that the dewatering efficiency is mainly governed by the mould's temperature while the duration of the contact time is not influential. In the second investigation, the geometrical accuracy of the mouldability of microfeatures was assessed. The process appeared to be dependently related to the pulp type employed. Finally, the internal microstructure was documented using X‐ray computed tomography. The analysis shows an increase in the internal void fraction linked with an increase in the mould's temperature. The role of the water change of phase in the thermoforming process is also discussed by reference to the work conducted on impulse drying.

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“…Axelsson (2009) demonstrated that digital image analysis of X-ray images is a fast, automatic, and reproducible method for characterizing microstructure of porous materials. In 2010, Axelsson and Svensson (2010) proposed a new computational method to extract pore network of duplex paper structure from scanned images. They introduced a pore-based skeleton representation of the material which is useful for permeability and tortuosity calculations.…”

Section: Introductionmentioning

confidence: 99%

Study of Hydraulic Properties of Uncoated Paper: Image Analysis and Pore-Scale Modeling

Aslannejad

Hassanizadeh

2017

Transp Porous Med

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In this study, uncoated paper was characterized. Three-dimensional structure of the layer was reconstructed using imaging results of micro-CT scanning with a relatively high resolution (0.9 μm). Image analysis provided the pore space of the layer, which was used to determine its porosity and pore size distribution. Representative elementary volume (REV) size was determined by calculating values of porosity and permeability values for varying domain sizes. We found that those values remained unchanged for domain sizes of 400 × 400 × 150 μm 3 and larger; this was chosen as the REV size. The determined REV size was verified by determining capillary pressure-saturation (P c -S) imbibition curves for various domain sizes. We studied the directional dependence of P c -S curves by simulating water penetration into the layer from various directions. We did not find any significant difference between P c -S curves in different directions. We studied the effect of compression of paper on P c -S curves. We found that up to 30% compression of the paper layer had very small effect on the P c -S curve. Relative permeability as a function of saturation was also calculated. Water penetration into paper was visualized using confocal laser scanning microscopy. Dynamic visualization of water flow in the paper showed that water moves along the fibers first and then fills the pores between them.

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3D pore structure characterisation of paper

Cited by 30 publications

References 26 publications

Paper‐Based Cell Cryopreservation

Paper‐Based Cell Cryopreservation

Moulded pulp products manufacturing with thermoforming

Study of Hydraulic Properties of Uncoated Paper: Image Analysis and Pore-Scale Modeling

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