Determination of decay resistance against Pleurotus ostreatus and Coniophora puteana fungus of heat-treated scotch pine, oak and beech wood species

Ayata, Ümit; Akçay, Çağlar; Esteves, Bruno

doi:10.4067/s0718-221x2017005000026

Cited by 17 publications

(19 citation statements)

References 12 publications

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“…Wood-based materials and composites are no exception [22][23][24]. Different nano-metals and nano-minerals were utilized to improve heat-transfer property in solid wood species and wood composite mats; they were also used to improve biological resistance against different deteriorating fungi to decrease hot-press time as a costly bottle-neck in nearly all wood-composite manufacturing factories and to increase thermal conductivity in solid wood and composite mats [3,15,18,[25][26][27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Improving Fire Retardancy of Beech Wood by Graphene

et al. 2020

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The aim of this paper was to improve the fire retardancy of beech wood by graphene. Six fire properties, namely time to onset of ignition, time to onset of glowing, back-darkening time, back-holing time, burnt area and weight loss were measured using a newly developed apparatus with piloted ignition. A set of specimens was treated with nano-wollastonite (NW) for comparison with the results of graphene-treated specimens. Graphene and NW were mixed in a water-based paint and brushed on the front and back surface of specimens. Results demonstrated significant improving effects of graphene on times to onset of ignition and glowing. Moreover, graphene drastically decreased the burnt area. Comparison between graphene- and NW-treated specimens demonstrated the superiority of graphene in all six fire properties measured here. Fire retardancy impact of graphene was attributed to its very low reaction ability with oxygen, as well as its high and low thermal conductivity in in-plane and cross-section directions, respectively. The improved fire-retardancy properties by the addition of graphene in paint implied its effectiveness in hindering the spread of fire in buildings and structures, providing a longer timespan to extinguish a fire, and ultimately reducing the loss of life and property. Based on the improvements in fire properties achieved in graphene-treated specimens, it was concluded that graphene has a great potential to be used as a fire retardant in solid wood species.

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Section: Introductionmentioning

confidence: 99%

Improving Fire Retardancy of Beech Wood by Graphene

et al. 2020

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“…6,[18][19][20][21][22] Wood-based materials and composites are no exception. 23,24 Different nano-metals and nanominerals were utilized to improve the heat-transfer property in solid wood species and wood composite mats; they were also used to improve biological resistance against different deteriorating fungi, 7,9,[25][26][27][28] to decrease hot-press time as a costly bottle-neck in nearly all wood-composite manufacturing factories, and to increase thermal conductivity in solid wood and composite mats. 29 In this connection, wollastonite is a calcium inosilicate mineral (CaSiO 3 ), which contains small amounts of iron, magnesium, and manganese substituting for calcium, that has been proved as nontoxic and harmless for both human health and wildlife.…”

Section: Introductionmentioning

confidence: 99%

Improving fire retardancy of medium density fiberboard by nano‐wollastonite

et al. 2020

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Summary The improving effects of addition of nano‐wollastonite on some fire properties of medium‐density fiberboard (MDF) were studied in this work. Nano‐wollastonite was added at four levels (2%, 4%, 6%, and 8%). The size range of at least 70% of nano‐wollastonite particles were 30 to 110 nm. The results showed statistically significant improving effect of nano‐wollastonite on time to onset of ignition. The improving effect was primarily attributed to an increase in thermal conductivity of board containing nano‐wollastonite. This increase in turn resulted in better curing of resin, and a higher integrity of fibers thereof. Moreover, nano‐particles provided a surface with reduced combustibility and therefore, penetration of fire to the inner layers of boards was delayed, thus improving fire properties. High and significant correlations were found between thermal conductivity coefficients of boards with different fire properties. It was concluded that for applications where fire properties are of prime importance, nano‐wollastonite content of 8% can be recommended. Moreover, further studies are needed to compare and standardize the results obtained from the apparatus used here with those obtained from internationally recognized apparatuses like cone calorimeter.

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“…Heat treatment (thermal modification) of wood is generally considered the most commercially used engineering process (Hill 2006). Effect of heat treatment from various perspective is quite elaborated during the past decades (Ayata et al 2017, Salman et al 2017. However, little research has been done as to the effects of heat treatment on permeability as an important physical property in solid wood species (Poonia et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Specific gas permeability of normal and nanosilver-impregnated solid wood species as influenced by heat-treatment

Taghiyari

Avramidis

2019

Maderas, Cienc. tecnol.

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The effect of heat treatment at 50 and up to 150°C was studied on dowel-shape specimens prepared from beech (Fagus orientalis), poplar (Populus nigra), and fir (Abies alba) wood. Specimens were cut into two diameter sizes (18 and 25 mm) to explore the effect of diameter size on permeability. Separate sets of specimens from each size and species were prepared to be first impregnated with a 200 ppm aqueous nanosilver (NS) suspension to investigate the effect of facilitated heat-transfer on permeability at different temperatures. Specimens were heated in five consecutive steps at 50, 75, 100, 125, and 150°C and for 24 hours in each step. High variance was found in the specific gas permeability between each treatment group, thus indicating probable high fluctuation in settlement of extractives at different spots of a log. Heat treatment only affected gas permeability at the first steps of heating (50 and 75°C), where loss of moisture content resulted in a permeability increase in nearly all species. Consecutive steps of heating up to 150°C did not significantly affect the permeability in either normal or NS-impregnated specimens.

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Determination of decay resistance against Pleurotus ostreatus and Coniophora puteana fungus of heat-treated scotch pine, oak and beech wood species

Cited by 17 publications

References 12 publications

Improving Fire Retardancy of Beech Wood by Graphene

Improving Fire Retardancy of Beech Wood by Graphene

Improving fire retardancy of medium density fiberboard by nano‐wollastonite

Specific gas permeability of normal and nanosilver-impregnated solid wood species as influenced by heat-treatment

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