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Special Topics & Reviews in Porous Media: An International Journal
ESCI SJR: 0.376 SNIP: 0.466 CiteScore™: 0.83

ISSN Druckformat: 2151-4798
ISSN Online: 2151-562X

Special Topics & Reviews in Porous Media: An International Journal

DOI: 10.1615/SpecialTopicsRevPorousMedia.v4.i1.80
pages 81-97

EFFECTS OF SILVER AND COPPER NANOPARTICLES ON GAS AND LIQUID PERMEABILITY OF HEAT-TREATED SOLID WOODS

Hamid Reza Taghiyari
Wood Science and Technology Department, Faculty of Civil Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran
Maryam Ghorbani
Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
Amin Kalantari
Wood Science and Technology Department, The Faculty of Civil Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran

ABSTRAKT

Effects of a 400 ppm aqueous dispersion of silver and copper nanoparticles on the gas and liquid permeability of heat-treated beech, poplar, and fir wood were studied here. The size range of both metal nanoparticles was 10−80 nm. Longitudinal cylinder specimens of 17.5 mm in diameter and 30 mm in length were impregnated under 2.5 bars of pressure for 20 min, using the empty-cell method (Rueping process). Control, nanosilver, and nanocopper-impregnated specimens were divided into three groups of unheated, heat-treated at 100° C, and heat-treated at 150° C; in total, nine treatments. Gas permeability values were measured under seven different vacuum pressures in a single run and the correlation of each was analyzed with two liquid permeabilities as first-drop and 50-mm-lowering times; both liquid permeabilities were measured using an RILEM test tube. Results showed that permeability in all three species increased by the impregnation. A high coefficient of determination was found between specific gas permeability with liquid permeability. Furthermore, cluster analysis showed that the effects of heat treatment depended on two main factors: density and permeability of the woody species.


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