2016
DOI: 10.1111/jmi.12420
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Porous structure of fibre networks formed by a foaming process: a comparative study of different characterization techniques

Abstract: Recent developments in making fibre materials using the foam-forming technology have raised a need to characterize the porous structure at low material density. In order to find an effective choice among all structure-characterization methods, both two-dimensional and three-dimensional techniques were used to explore the porous structure of foam-formed samples made with two different types of cellulose fibre. These techniques included X-ray microtomography, scanning electron microscopy, light microscopy, direc… Show more

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Cited by 13 publications
(13 citation statements)
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References 23 publications
(45 reference statements)
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“…The normalized frequency of various diameters gives the volume-weighted pore-size distribution. [21,124] As said earlier, the structure of the wet foam leaves special traces in the formed fiber network. This is seen in Figure 28 where we show the pore-size distribution characterized with X-ray microtomography for a foam-formed CTMP pulp sheet.…”
Section: Pore-size Distributionmentioning
confidence: 77%
See 3 more Smart Citations
“…The normalized frequency of various diameters gives the volume-weighted pore-size distribution. [21,124] As said earlier, the structure of the wet foam leaves special traces in the formed fiber network. This is seen in Figure 28 where we show the pore-size distribution characterized with X-ray microtomography for a foam-formed CTMP pulp sheet.…”
Section: Pore-size Distributionmentioning
confidence: 77%
“…Direct microscopic imaging is often an effective way of getting an idea of the overall structure of material. There are both 2D and 3D imaging methods whose differences have been discussed in detail by Al-Qararah et al [124] The average bubble diameter of typical wet foams is of the order of 100 mm, which leads to a slightly smaller average pore size of the formed fiber network. Thus, the 1 mm resolution of today's X-ray microtomography is usually quite sufficient to obtain a good 3D image of the porous structure ( Figure 24) and to benchmark other methods against the obtained results.…”
Section: Structural Analysis and Physical Testing Methodsmentioning
confidence: 99%
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“…Various formulations and techniques have been proposed to control the pore structure of foam-laid webs. 19 Among these, carboxymethylated lignin was proposed as a biobased surface-active molecule suitable for foam-laying. 26 However, due to the different foam-generating methods and criteria for surfactant addition, it is difficult to compare the physical properties of webs to design foam-laid products.…”
Section: ■ Introductionmentioning
confidence: 99%