Poren und Porigkeit in Hölzern

Kollmann, Franz

doi:10.1007/bf02612035

Cited by 8 publications

(1 citation statement)

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“…Stamm (1964) discusses the microscopic structure of wood and gives like Siau (1995), Kollmann (1987) and Wagenführ (2007) an overview of the pore structure of different woods. For softwood, the typical diameters of tracheids are between 10 and 50 µm.…”

Section: Introductionmentioning

confidence: 99%

Porosity and pore size distribution of different wood types as determined by mercury intrusion porosimetry

2010

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In this work, densities and porosity parameters are determined on domestic and overseas soft-and hardwoods by application of pycnometric methods and mercury intrusion porosimetry (MIP). Great variability was found in bulk density, porosity and in the specific surface area. According to the pore size distribution, four pore size classes could be distinguished: macropores (radius 58-2 µm and 2-0.5 µm), mesopores (500-80 nm), and micropores (80-1.8 nm). The pore size distribution can vary even in the case of comparable pore volumes. The hardwoods, particularly the European diffuse-porous ones, show a higher amount of micropores, which represent the microvoids or cell wall capillaries. A high cumulative pore volume can also be the result of a high content of micropores with poorer accessibility. The value of the total specific surface area from MIP measurements is, generally, below those values obtained by the water vapour adsorption technique. These results can provide information for further investigations on the sorption behaviour and the fluid intake as technological characteristics in industrial processes of impregnation and penetration of coating materials or adhesives. M. Plötze ( ) ETH

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Section: Introductionmentioning

confidence: 99%