Properties of mixed particleboards based on white birch (Betula papyrifera) inner bark particles and reinforced with wood fibres

Pedieu, Roger; Riedl, Bernard; Pichette, André

doi:10.1007/s00107-008-0297-6

Cited by 26 publications

(13 citation statements)

References 7 publications

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“…They are used also for wood-based composite and panel products (PEDIEU et al, 2009). The wood of Acacia melanoxylon is highly regarded in its natural region as a quality timber for carpentry and cabinet making (JENNINGS et al, 2003) and with potential to develop into a quality leader of short-fi ber pulp (GIL et al, 1999).…”

Section: Tavares F Et Almentioning

confidence: 99%

Wood and bark fiber characteristics of Acacia melanoxylon and comparison to Eucalyptus globules

Tavares

Quilhó

Pereira

2011

CERNE

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Wood and bark fi bers of Acacia melanoxylon were characterized and compared to Eucalyptus globulus which is a major quality source of pulp fi bers. In 20 trees from four sites, fi ber length and wall thickness were measured at 5, 35 and 65% of total tree height and at 10, 30, 50, 70 and 90% of the distance from pith. Maceration were prepared in a 1:1 glacial acetic acid:hydrogen peroxide solution. Wood and bark fi ber length varied between 0.90 -0.96 mm and 1.33 -1.59 mm respectively. The cell wall thickness varied between 3.45 -3.89 μm in wood and 5.01 -5.40 μm in bark. Wood and bark fi ber length decreased from the bottom to the top of the tree and cell wall thickness had no specifi c pattern for axial variation. Fiber length and wall thickness increased from the pith to the bark, but the wall thickness increased slightly with some fl uctuations. In Acacia melanoxylon signifi cant site differences were found in relation to bark fi ber length and to wood wall thickness. The fi bers of Acacia melanoxylon were similar to those of Eucalyptus globulus but the wood fi bers were thinner and the bark fi bers thicker. The radial variation was similar in both species. In wood of Eucalyptus globulus, fi ber wall thickness increases from the base to the middle of tree height and decreases to the top; in the bark decreases from the base to the top. In Eucalyptus globulus fi bers bark are higher in the top.Key words: Xylem, phloem, cell biometry, acacia, eucalypts. COMPARAÇÃO DAS CARACTERÍSTICAS DAS FIBRAS

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Section: Tavares F Et Almentioning

confidence: 99%

Wood and bark fiber characteristics of Acacia melanoxylon and comparison to Eucalyptus globules

Tavares

Quilhó

Pereira

2011

CERNE

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“…The proportion of bark of the harvested tree can be as much as 10-20%, depending on the species and diameter of the tree (Sopp -Kolozs 2000). The bark of processed wood is mostly used for generation of energy (Ragland et al 1991), for mulching (Colorado Master Gardeners Program 2009), and for extracting of chemical compounds (Hoong et al 2011), among other uses (Harkin -Rowe 1971, Pedieu et al 2009). Since the bark does not possess a mechanical stability similar to wood, its use for insulation is mainly possible in the form of chips or particles.…”

Section: Introductionmentioning

confidence: 99%

The Thermal Insulation Capacity of Tree Bark

Pásztory¹,

Ronyecz²

2013

Acta Silvatica Et Lignaria Hungarica

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-Nowadays increasing emphasis is placed on improving the quality of different insulation materials, and on developing such from materials of natural origin. The present research focuses on the thermal insulation capacity of the chipped bark of different broadleaved and coniferous wood species. We examined the bark of five tree species: black locust, a poplar clone, larch, spruce, and Scotch pine and compared their insulation characteristics to the traditionally used insulation materials. Results indicate that the thermal insulation capacity of chipped tree bark is comparable to that of generally used insulation materials, such as glass wool. Moisture content influences the thermal insulation capacity of chipped bark of the five examined species. Since energy requirement of producing chipped tree bark is very low, and it contributes also to storing carbon, therefore its CO 2 balance is more advantageous compared to that of traditional fibrous or foamy insulation materials. tree bark / insulation capacity / moisture content / CO 2 footprint Kivonat -A fakéreg hőszigetelési tulajdonságai Manapság egyre nagyobb hangsúlyt fektetnek a különböző szigetelőanyagok javítására. A tanulmány bemutatja a különböző lombos-és tűlevelű fafajok kérgének hőszigetelő képességét. Öt fafajt vizsgáltunk meg: az akácot, a Pannonia nyár klónt, az erdeifenyőt, a vörösfenyőt és a lucfenyőt. A tanulmány mind a kezdő nedvességtartalmú, mind a 12%-os nedvességtartalomra szárított kérgeket vizsgálja. A kutatás megmutatta, hogy a fakéreg hasonló hőszigetelési tulajdonságokkal rendelkezik, mint más, általánosan használt szigetelő anyagok. A fakéreg feldolgozása alacsony energiafelhasználással jár és CO 2 mérlege is lényegesen jobb, mint a hagyományos szigetelő anyagok. fakéreg / hőszigetelő képesség / nedvességtartalom / CO 2 lábnyom

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“…Over the last few decades, bark-based panels bonded using urea formaldehyde (UF) resin have been highly investigated. In Pedieu et al (2009), white birch inner bark particles were applied in the core layer of particleboard with wood fiberreinforced surfaces. They discovered that almost 70% of wood fibers could be replaced by white birch inner bark while maintaining the required mechanical and physical properties.…”

Section: Introductionmentioning

confidence: 99%

Influence of Urea-formaldehyde Adhesive Modification with Beech Bark on Chosen Properties of Plywood

Ružiak¹,

Igaz²,

Krišťák³

et al. 2017

BioResources

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The influence of beech bark concentrations as filler in urea-formaldehyde (UF) adhesives was investigated relative to the composite forming process and selected properties of final 5-layer beech plywood. Beech bark was used as filler to lower the wood processing waste production and decrease formaldehyde emissions. A combination of UF adhesives filled with different beech bark concentrations as the adhesive was used. Three different concentrations of beech bark, 15 wt.%, 20 wt.%, and 25 wt.% were used in the experiment. Urea-formaldehyde adhesive filled with 20 wt.% technical flour was used as a reference sample. The effect of the filler was studied via its temperature profile during pressing, mechanical properties in bending, water absorption, thickness swelling, and formaldehyde emissions after pressing. The time needed to reach the temperature between the beech veneers, at least 105 °C, which was equal to the final temperature filler-adhesive-wood matrix cross-linking, was also investigated during the pressing process. The measurements of the free formaldehyde emissions showed that for samples with non-zero bark concentrations there was a decrease of formaldehyde emissions by at least 46%.

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Properties of mixed particleboards based on white birch (Betula papyrifera) inner bark particles and reinforced with wood fibres

Cited by 26 publications

References 7 publications

Wood and bark fiber characteristics of Acacia melanoxylon and comparison to Eucalyptus globules

Wood and bark fiber characteristics of Acacia melanoxylon and comparison to Eucalyptus globules

The Thermal Insulation Capacity of Tree Bark

Influence of Urea-formaldehyde Adhesive Modification with Beech Bark on Chosen Properties of Plywood

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