Effects of dry ice on gas permeability of nano-silver-impregnated Populus nigra and Fagus orientalis.
Identifieur interne : 002A54 ( Main/Curation ); précédent : 002A53; suivant : 002A55Effects of dry ice on gas permeability of nano-silver-impregnated Populus nigra and Fagus orientalis.
Auteurs : H R Taghiyari [Iran] ; M. Layeghi ; F. Aminzadeh LiyafooeeSource :
- IET nanobiotechnology [ 1751-8741 ] ; 2012.
Descripteurs français
- KwdFr :
- Argent (composition chimique), Bois (composition chimique), Eau (MeSH), Fagus (composition chimique), Gaz (MeSH), Microscopie électronique à balayage (MeSH), Nanoparticules métalliques (composition chimique), Neige carbonique (MeSH), Perméabilité (MeSH), Populus (composition chimique), Taille de particule (MeSH).
- MESH :
- composition chimique : Argent, Bois, Fagus, Nanoparticules métalliques, Populus.
- Eau, Gaz, Microscopie électronique à balayage, Neige carbonique, Perméabilité, Taille de particule.
English descriptors
- KwdEn :
- MESH :
- chemical , chemistry : Silver.
- chemical : Dry Ice, Gases, Water.
- chemistry : Fagus, Metal Nanoparticles, Populus, Wood.
- Microscopy, Electron, Scanning, Particle Size, Permeability.
Abstract
Effects of dry-ice treatment (frozen CO(2) at -78.5°C) on gas permeability of untreated and nano-silver-impregnated poplar and beech specimens were studied here on the basis of their biological structure and woody mass as well as their vessel element types. A 200 ppm aqueous dispersion of silver nano-particles was used for impregnation; the size range of silver nano-particles was 20-80 nm. Dry-ice treatment increased gas permeability by 87 and 45% in poplar and beech, respectively. Nano-silver impregnation also increased gas permeability by 190 and 89% in poplar and beech, respectively. Dry-ice treatment on nano-silver-impregnated specimens increased gas permeability even more (31% increase in poplar but only 0.96% in beech). It may be concluded that dry-ice treatment on solid woods may be used as a practical method to increase permeability in species that because of their biological structures are impermeable; since this method alters the biological structure slightly and consequently decreases mechanical strength of solid woods insignificantly, it may substitute methods such as incising to increase permeability.
DOI: 10.1049/iet-nbt.2011.0048
PubMed: 22559705
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pubmed:22559705Le document en format XML
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<author><name sortKey="Taghiyari, H R" sort="Taghiyari, H R" uniqKey="Taghiyari H" first="H R" last="Taghiyari">H R Taghiyari</name>
<affiliation wicri:level="1"><nlm:affiliation>Shahid Rajaee Teacher Training University, Wood Science and Technology Department, Tehran, Iran. htaghiyari@srttu.edu</nlm:affiliation>
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<author><name sortKey="Layeghi, M" sort="Layeghi, M" uniqKey="Layeghi M" first="M" last="Layeghi">M. Layeghi</name>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Dry Ice (MeSH)</term>
<term>Fagus (chemistry)</term>
<term>Gases (MeSH)</term>
<term>Metal Nanoparticles (chemistry)</term>
<term>Microscopy, Electron, Scanning (MeSH)</term>
<term>Particle Size (MeSH)</term>
<term>Permeability (MeSH)</term>
<term>Populus (chemistry)</term>
<term>Silver (chemistry)</term>
<term>Water (MeSH)</term>
<term>Wood (chemistry)</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr"><term>Argent (composition chimique)</term>
<term>Bois (composition chimique)</term>
<term>Eau (MeSH)</term>
<term>Fagus (composition chimique)</term>
<term>Gaz (MeSH)</term>
<term>Microscopie électronique à balayage (MeSH)</term>
<term>Nanoparticules métalliques (composition chimique)</term>
<term>Neige carbonique (MeSH)</term>
<term>Perméabilité (MeSH)</term>
<term>Populus (composition chimique)</term>
<term>Taille de particule (MeSH)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Silver</term>
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<keywords scheme="MESH" type="chemical" xml:lang="en"><term>Dry Ice</term>
<term>Gases</term>
<term>Water</term>
</keywords>
<keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Fagus</term>
<term>Metal Nanoparticles</term>
<term>Populus</term>
<term>Wood</term>
</keywords>
<keywords scheme="MESH" qualifier="composition chimique" xml:lang="fr"><term>Argent</term>
<term>Bois</term>
<term>Fagus</term>
<term>Nanoparticules métalliques</term>
<term>Populus</term>
</keywords>
<keywords scheme="MESH" xml:lang="en"><term>Microscopy, Electron, Scanning</term>
<term>Particle Size</term>
<term>Permeability</term>
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<keywords scheme="MESH" xml:lang="fr"><term>Eau</term>
<term>Gaz</term>
<term>Microscopie électronique à balayage</term>
<term>Neige carbonique</term>
<term>Perméabilité</term>
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<front><div type="abstract" xml:lang="en">Effects of dry-ice treatment (frozen CO(2) at -78.5°C) on gas permeability of untreated and nano-silver-impregnated poplar and beech specimens were studied here on the basis of their biological structure and woody mass as well as their vessel element types. A 200 ppm aqueous dispersion of silver nano-particles was used for impregnation; the size range of silver nano-particles was 20-80 nm. Dry-ice treatment increased gas permeability by 87 and 45% in poplar and beech, respectively. Nano-silver impregnation also increased gas permeability by 190 and 89% in poplar and beech, respectively. Dry-ice treatment on nano-silver-impregnated specimens increased gas permeability even more (31% increase in poplar but only 0.96% in beech). It may be concluded that dry-ice treatment on solid woods may be used as a practical method to increase permeability in species that because of their biological structures are impermeable; since this method alters the biological structure slightly and consequently decreases mechanical strength of solid woods insignificantly, it may substitute methods such as incising to increase permeability.</div>
</front>
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