Liquid Porosimetry: New Methodology and Applications

Miller, Bernard; Tyomkin, Ilya

doi:10.1006/jcis.1994.1021

Cited by 77 publications

(43 citation statements)

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“…The equipment is described in e.g. Miller and Tyomkin (1994). In this investigation, the receding mode was used where the sample was pre-saturated prior to the measurements.…”

Section: Liquid Porosimetrymentioning

confidence: 99%

Reinforced absorbent material: a cellulosic composite of TEMPO-oxidized MFC and CTMP fibres

et al. 2012

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This research aims to develop new materials based on renewable resources that can fulfill the functions necessary in the absorption core of a disposable diaper. Absorbent foam was recently produced from softwood kraft pulp by TEMPO oxidation, disintegration and freeze drying. In this study, the TEMPO-oxidized MFC was mixed with pulp fibres, thus forming a cellulosic composite, in an attempt to improve the mechanical stability of the freeze-dried absorbent material. The fibres were added in different amounts and the freeze-dried materials were evaluated for their absorption and retention properties. The results of this study suggest that the composite material has a better mechanical stability than the absorbent foam without fibres. It was shown that using spruce CTMP fibres in the composite resulted in better absorption and retention capacities than in a composite with softwood kraft pulp fibres. The higher stiffness of the CTMP fibres is a probable explanation for this difference. For the composite material with CTMP fibres, liquid porosimetry showed that pore size distribution was more or less retained when put under load. Furthermore, it was seen that the retention properties reached a maximum around 85 % CTMP fibres and 15 % TEMPO-oxidized MFC. In the centrifuge retention test, the retention of the TEMPO-oxidized MFC in the composite material reached about the same capacity as conventional superabsorbent polymers.

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“…The equipment is described in e.g. Miller and Tyomkin (1994). In this investigation, the receding mode was used where the sample was pre-saturated prior to the measurements.…”

Section: Liquid Porosimetrymentioning

confidence: 99%

Reinforced absorbent material: a cellulosic composite of TEMPO-oxidized MFC and CTMP fibres

et al. 2012

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“…The hydrophilicity of the fabric samples was measured in terms of structural contact angle with a TRI auto-porosimeter (Miller & Tyomkin 1994;Agrawal et al 2007). An auto-porosimeter gives additional information on the inter-and intra-yarn pore size distribution of the fabric sample.…”

Section: Structural Contact Anglementioning

confidence: 99%

Cutinase and pectinase in cotton bioscouring: an innovative and fast bioscouring process

Agrawal

Nierstrasz

Bouwhuis

et al. 2008

Biocatalysis and Biotransformation

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This manuscript describes the potential of a cutinase from the fungus Fusarium solani pisi for cotton wax degradation in order to design an efficient low temperature scouring process. The main characteristics, relevant to cotton wax removal with F. solani pisi cutinase are given. The additive effect of cutinase on pectinase was investigated and optimum incubation conditions were determined. Compatibility of cutinase with surfactants, essential for the rapid migration of enzymes into the fabric, is explored. A clear strategy is presented to achieve a rapid enzymatic cotton scouring process. Wax removal with cutinase reduces pectinase incubation time and increases the hydrolytic rate of pectinase. Cutinase appears to be effective in the degradation of cotton waxes at low-temperature, allowing the design and introduction of a competitive innovative enzymatic scouring process.

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“…Miller and Tyomkin (1994) described the principles and operating procedure for liquid porosimetry in detail, which requires quantitative monitoring of the movement of liquid into or out of a porous structure. The pore volume distribution (PVD) typical data output for a single incremental liquid extrusion run is a cumulative curve that represents the amount of liquid remaining in the pores (as the pressure increased).…”

Section: Analysis Of Pore Volume Distributionmentioning

confidence: 99%

“…Woven fabrics, such as cotton fabrics used in this study, typically give bimodal distributions (Miller and Tyomkin 1994), where the larger pore sizes are supplied by the spaces between yarns (interyarn pores) and the smaller (intrayarn or interfiber) pores reflect intrayarn structure. Without going into details of theory that describes pores between fibers in fiber assemblies (see for instance Neckář and Ibrahim 2003), it can be understood that the pores between yarns or fibers express the relative amount of air or fluid found in the gaps between yarns and/or fibers.…”

Section: Pore Volume Distributionmentioning

confidence: 99%

Analysis of the effects of catalytic bleaching on cotton

et al. 2007

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Hydrogen peroxide can be catalyzed to bleach cotton fibers at temperatures as low as 308C by incorporating dinuclear tri-l-oxo bridged manganese(IV) complex of the ligand 1,4,7-trimethyl-1,4,7-triazacyclononane (MnTACN) as the catalyst in the bleaching solution. The catalytic system was found to be more selective under the conditions applied than the non-catalytic H 2 O 2 system, showing better bleaching performance while causing slightly lower decrease in degree of polymerization (DP) of cellulose. In order to gain fundamental knowledge of the bleach effect on cotton fibers and cellulose as its main component, especially after catalytic bleaching, X-ray Photoelectron Spectroscopy (XPS) was used to study surface chemical effects. The Washburn method was applied to investigate wetting properties, and liquid porosity was used to obtain pore volume distribution (PVD) plots. Parallel analyzes performed on model cotton fabric, i.e. ''clean'' cotton fabric stained with morin -a pigment regularly found in native cotton fiber, helped to differentiate between pigment oxidation and other bleaching effects produced on the (regular) industrially scoured cotton fabric. Bleaching was not limited to the chemical action but also affected cotton fiber capillary parameters most likely due to the removal of non-cellulosic materials as well as chain-shortened cellulose.

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Liquid Porosimetry: New Methodology and Applications

Cited by 77 publications

References 0 publications

Reinforced absorbent material: a cellulosic composite of TEMPO-oxidized MFC and CTMP fibres

Reinforced absorbent material: a cellulosic composite of TEMPO-oxidized MFC and CTMP fibres

Cutinase and pectinase in cotton bioscouring: an innovative and fast bioscouring process

Analysis of the effects of catalytic bleaching on cotton

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