A comparative study of methods for porosity determination of cellulose based porous materials

Hossen, Muhammad R.; Talbot, Matthew W.; Kennard, Raymond; Bousfield, Douglas W.; Mason, Michael D.

doi:10.1007/s10570-020-03257-9

Cited by 37 publications

(13 citation statements)

References 49 publications

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“…Underestimation or overestimation shows the importance of the appropriate selection of the method and its parameters for the given research material. According to Hossen et al [158], saturation methods (here saturation with silicon oil) are less complicated and cheaper for low-density materials like foams fluid than mercury porosimetry, while geometric method, SEM and BJH sorption methods can give, in this case, deviated results from expected ones. Studies by Ghasemi-Mobarakeh et al [146] showed that surface layers of nanofiber materials should not be analyzed by mercury porosimetry or density measurements, due to the possible influence of high pressure.…”

Section: Methods Used To Assess Porosity In Materialsmentioning

confidence: 99%

Contemporary Approach to the Porosity of Dental Materials and Methods of Its Measurement

Sarna‐Boś

Skic

Sobieszczański

et al. 2021

IJMS

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Porosity is an important parameter for characterizing the microstructure of solids that corresponds to the volume of the void space, which may contain fluid or air, over the total volume of the material. Many materials of natural and technically manufactured origin have a large number of voids in their internal structure, relatively small in size, compared to the characteristic dimensions of the body itself. Thus, porosity is an important feature of industrial materials, but also of biological ones. The porous structure affects a number of material properties, such as sorption capacity, as well as mechanical, thermal, and electrical properties. Porosity of materials is an important factor in research on biomaterials. The most popular materials used to rebuild damaged tooth tissues are composites and ceramics, whilst titanium alloys are used in the production of implants that replace the tooth root. Research indicates that the most comprehensive approach to examining such materials should involve an analysis using several complementary methods covering the widest possible range of pore sizes. In addition to the constantly observed increase in the resolution capabilities of devices, the development of computational models and algorithms improving the quality of the measurement signal remains a big challenge.

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Section: Methods Used To Assess Porosity In Materialsmentioning

confidence: 99%

Contemporary Approach to the Porosity of Dental Materials and Methods of Its Measurement

Sarna‐Boś

Skic

Sobieszczański

et al. 2021

IJMS

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“…In-situ investigations of phase transformations of powder mixtures during heating and cooling by XRD. uncertainty for materials with high porosity [63], the porosity data presented here are still effective for a qualitative and in particular a relative assessment of the different samples. CF-900 possesses the highest porosity and contains the smallest grains among all the samples, as can be seen in Table 2 and Fig.…”

Section: Microstructural Investigationsmentioning

confidence: 96%

Optimization of sintering conditions for improved microstructural and mechanical properties of dense Ce0.8Gd0.2O2--FeCo2O4 oxygen transport membranes

Zeng

Malzbender

Baumann

et al. 2021

Journal of the European Ceramic Society

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“…The density from the silicon oil test depends on the oil penetrating into the pores. Recently, Hossen et al 33 discuss various methods to characterize the porosity of cellulose nanomaterial structures.…”

Section: Methodsmentioning

confidence: 99%

Processing Effects on Structure, Strength, and Barrier Properties of Refiner-Produced Cellulose Nanofibril Layers

Fein

Bousfield

Gramlich

2021

ACS Appl. Polym. Mater.

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Cellulose nanofibrils (CNFs) have been studied as a potential component in packaging applications and as standalone films because of their remarkable barrier properties toward grease, oil, and oxygen. Fiber type, pretreatments before fibrillation, fibrillation methods, and other parameters can influence the CNF quality. CNFs produced using a refiner may be coarser than CNFs manufactured with pretreatments such as oxidation with the 2,2,6,6-tetramethylpiperidine-1-oxyl radical, but refiner CNFs can offer an economical option that may still have desired properties. For refiner CNFs, the forming parameters and basis weight influence on the final structure and barrier properties is not well understood. CNF films at different basis weights were formed by film casting, and vacuum filtration methods were followed by restrained drying. As the basis weight increases, the density of the film increased for both formation methods. Cast films had higher densities than filtration-formed films. All samples had mechanical properties that scaled with the basis weight of the film. Crosssectional images determined that the internal structure of these films showed a layered arrangement separated by voids. A dense surface skin layer formed on the films which may contribute to the excellent grease barrier properties even after folding. The layered core structure with elongated voids may dissipate energy during folding allowing deformation to occur without damage to the surface layers, which likely contribute to the water vapor and grease barrier properties that do not deteriorate with folding. The development of the skin-core structure and density were explored by freezing the samples at different times during the drying process, freezedrying, and imaging with a scanning electron microscope to determine the critical solids contents to form a continuous surface skin. Surface skins formed early in the drying process and generated grease barrier properties early during drying. A mechanism is proposed for the evolution of the CNF film structure throughout the drying process, which is similar to the skin formation during the drying of polymeric solutions.

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A comparative study of methods for porosity determination of cellulose based porous materials

Cited by 37 publications

References 49 publications

Contemporary Approach to the Porosity of Dental Materials and Methods of Its Measurement

Contemporary Approach to the Porosity of Dental Materials and Methods of Its Measurement

Optimization of sintering conditions for improved microstructural and mechanical properties of dense Ce0.8Gd0.2O2--FeCo2O4 oxygen transport membranes

Processing Effects on Structure, Strength, and Barrier Properties of Refiner-Produced Cellulose Nanofibril Layers

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