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Influence of drying temperature on properties of wood surfaces
Milan Šernek, 2002

Abstract: This article deals with modifications of wood surface properties induced by different drying temperatures. The aim of the study was chemical and physical characterization of a wood surface concerning low and high temperature exposure. Additionally, the correlation between the chemical composition of a wood surface and its wetting capacity were investigated. X-ray photoelectron spectroscopy and contact angle measurements were conducted. Two wood species, yellow poplar (Liriodendron tulipifera) and southern pine (Pinus taeda) were studied. The results showed that the percentage of carbon increased with drying temperature, and consequently, the percentage of oxygen decreased. The samples exposed to high drying temperatures indicated a higher content of extractives on the wood surface. These samples exhibited the highest contact angle and the lowest wettability
Keywords: površina lesa, sušenje, kontaktni kot, rentgenska fotoelektronska spektroskopija, omočitev, ekstraktivne snovi, wood surface, drying, contact angle, XPS, wettability, extractives
DiRROS - Published: 12.07.2017; Views: 2880; Downloads: 1109
.pdf Fulltext (932,44 KB)

3.
Waviness of beech sliced veneer
Dominika Gornik Bučar, Bojan Gospodarič, 2016

Abstract: V lesni industriji je plemeniti furnir izdelek z visoko dodano vrednostjo. Tehnološki proces izdelave je razmeroma dobro poznan, vendar na kakovost izdelanega furnirja in posledično ceno vpliva veliko tehnoloških parametrov izdelave, največji vpliv pa ima kakovost hlodovine. V raziskavi smo preučili vpliv optičnih napak bukove (Fagus sylvatica L.) hlodovine in vpliv klimatskih razmer v fazi sušenja rezanega furnirja na valovitost površine. Raziskava je bila opravljena v industrijskem okolju. Rezultati kažejo, da je bilo procentualno največ valovitega furnirja izrezanega iz razpokanega hloda (71 %), najmanj pa iz ukrivljenega hloda (20 %). Kakovostno razvrščanje furnirja je bilo ročno in po subjektivnem kriteriju izkušenih kontrolorjev iz industrije. Kljub njihovim izkušnjam pa lahko subjektivna ocena vpliva na natančnost razvrščanja in s tem na rezultate raziskave. Zato smo preučili tudi možnost integracije 3D kamere za merjenje valovitosti furnirja in razvrščanje furnirja v kakovostne razrede.
Keywords: bukev, Fagus sylvatica, rezani furnir, sušenje, kakovost, valovitost, 3D meritve
DiRROS - Published: 12.07.2017; Views: 3050; Downloads: 1295
.pdf Fulltext (1,12 MB)

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O sušenju jelke in nekaterih pojavih, ki ga spremljajo
Miran Brinar, 1970

Keywords: sušenje jelke
DiRROS - Published: 12.07.2017; Views: 2509; Downloads: 965
.pdf Fulltext (5,73 MB)

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Rdeči bor se je začel sušiti po toči
Marija Kolšek, Franc Kogovšek, Dušan Jurc, 2010

Keywords: rdeči bor, Pinus sylvestris L., sušenje, bolezni drevja, gozdovi, varstvo gozdov
DiRROS - Published: 29.07.2020; Views: 916; Downloads: 545
URL Fulltext (0,00 KB)
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