Combining mineralisation and thermal modification to improve the fungal durability of selected wood species

Repič, Rožle; Pondelak, Andreja; Kržišnik, Davor; Humar, Miha; Škapin, Andrijana Sever

doi:10.1016/j.jclepro.2022.131530

Cited by 11 publications

(10 citation statements)

References 42 publications

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“…The synergistic effect of thermal modi cation and mineralisation on the resistance of wood to fungal decay was con rmed in one of our previous studies (Repič et al 2022), but the effects on its re properties were not determined. The aim of the present study is to comprehensively investigate the synergistic effects of these two environmentally acceptable methods (mineralisation and thermal modi cation) on the relevant properties of wood i.e.…”

Section: )mentioning

confidence: 88%

“…Next, the water performance of the wood was investigated using various methods. In addition to the moisture content of the samples, the data for which was taken from Repič et al (2022), the bre saturation (FS) was determined by calculating the ratio of volume swelling (α v ) to dry density (ρ 0 ), according to Eq. ( 1), and correcting for the density of adsorbed water (Gorišek, 2009),…”

Section: Methodsmentioning

confidence: 99%

“…Resistance to wood decay fungi was determined according to EN 113-1:2020. The procedure is described in detail by Repič et al (2022). Brie y, two different wood decay fungi were used: white rot, represented by Trametes versicolor (TV) (ZIM L057), and brown rot, represented by Gloeophyllum trabeum (GT) (ZIM L017).…”

Section: Methodsmentioning

confidence: 99%

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Environmentally friendly protection of European beech wood (Fagus sylvatica) against fire and fungal decay using a combination of thermal modification and mineralisation

Repič

Pondelak

Kržišnik

et al. 2023

Preprint

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The demand for construction timber is continuously increasing, due to its excellent mechanical properties, renewable nature and easy accessibility. As it is flammable and susceptible to biodegradation, however, the adequate protection of wood is key to its successful use. Given that thermal modification enhances the durability of wood, and mineralisation with CaCO3 considerably improves its fire properties, it is worth considering the synergistic effects of the two methods combined. European beech (Fagus sylvatica) was selected for this study to determine the effects of a) thermal modification at 220 °C, b) mineralisation through the in-situ formation of CaCO3 inside the wood’s structure, and c) a combination of the two procedures, on resistance to decay fungi, reaction to fire and the mechanical properties of the wood. Microscopic analysis and comparisons of the samples before and after exposure to fungi were also conducted. Mineralised samples generally have a slightly alkaline pH value and a higher equilibrium moisture content, while thermal modification lowers the equilibrium moisture content. The mineralisation of beech wood significantly improved its reaction to fire and biological durability. We proved the synergistic effect of thermal modification and mineralisation: the best response to fire as well as resistance to fungi was achieved when the two treatments were combined. Results from the Brinell hardness and three-point bending tests indicate that both modification procedures can slightly impair the mechanical properties of the wood. Due to their favourable characteristics, such wood-inorganic composites have great potential for use in construction industry.

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Section: )mentioning

confidence: 88%

Section: Methodsmentioning

confidence: 99%

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Environmentally friendly protection of European beech wood (Fagus sylvatica) against fire and fungal decay using a combination of thermal modification and mineralisation

Repič

Pondelak

Kržišnik

et al. 2023

Preprint

Self Cite

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“…Therefore, the links in the wood loosen and soften with the increasing temperature to facilitate the process of wood compression. The great forces in compression process reduce the distance between the wood cells, the hollow part, and the amount of oxygen, which is an unfavorable condition for the growth of fungi [12]. Due to high temperature and long treatment time, some wood extracts can be removed or hemicellulose in wood is decomposed, leading to reduce the number of hydroxyl groups (-OH) and improve the resistance to water absorption [17].…”

Section: Mass Loss Rate Under Laboratory Conditionsmentioning

confidence: 99%

“…In recent years, there have been the studies on improving the natural durability of wood without the use of harmful chemicals [12]. Treatment methods that apply a mechanism to limit the water penetration into the wood and make the wood structure after treatment have the ability to limit or resist microbial growth [13,14].…”

Section: Introductionmentioning

confidence: 99%

Resistance of Cunninghamia lanceolata Wood Against White-rot Fungi by Using Thermo-Mechanical Treatment

Tuyen¹,

Chuong²,

Dung³

2023

JAC

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Heat treatment is an effective method to enhance the biological durability of wood without the use of preservatives. This study aims to analyze the effect of thermo-mechanical treatment on the durability of wood against the attack of some white rot fungi. The central composite design (CCD) method with the help of Design Expert 12.0 software was used to investigate the effects of temperature, compression time, and compression ratio on the white rot fungus resistance of Cunninghamia lanceolata wood. The obtained results revealed that the thermo-mechanical treatment of Cunninghamia lanceolata samples showed improved antifungal resistance compared to the untreated ones. After 4 months of testing in laboratory conditions, all wood samples with heat-mechanical treatment showed better resistance to fungi. Moreover, the different temperatures, compression ratios, and compression time bring out the different mass loss rates. The obtained results indicate that the wood samples modified at the temperature of 200°C, and 0.6 min/mm thickness combined with the compression ratio ranging from 40÷42% gave the lowest loss rate. Particularly, the resistance test for Lentinula edodes gives the best results when the wood compression time is at 0.7 min/mm thickness. Also, this work would provide a scientific and theoretical basis for the relationship between thermo-mechanical treatment and the biological durability of Cunninghamia lanceolata wood.

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A green and eco-friendly method to enhance Bamboo flame resistance via calcium alginate assisted in-situ mineralization of hydroxyapatite

He,

Bao,

et al. 2024

Chemical Engineering Journal

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Combining mineralisation and thermal modification to improve the fungal durability of selected wood species

Cited by 11 publications

References 42 publications

Environmentally friendly protection of European beech wood (Fagus sylvatica) against fire and fungal decay using a combination of thermal modification and mineralisation

Environmentally friendly protection of European beech wood (Fagus sylvatica) against fire and fungal decay using a combination of thermal modification and mineralisation

Resistance of Cunninghamia lanceolata Wood Against White-rot Fungi by Using Thermo-Mechanical Treatment

A green and eco-friendly method to enhance Bamboo flame resistance via calcium alginate assisted in-situ mineralization of hydroxyapatite

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