Evaluation of Sapwood and Heartwood Decay Resistance after Immersion-Treatment with Pyroligneous Liquor

Won, Kyung Rok; Hong, Nam Euy; Park, Han-Min; Byeon, Hee Seop

doi:10.5658/wood.2016.44.6.880

Cited by 3 publications

(3 citation statements)

References 17 publications

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“…Dimensional changes caused by high moisture levels or moisture gradients in wood cause stress inside the wood, which is relieved by the formation of cracks (Dietsch et al 2015). In addition, the high moisture content (MC) is a cause of decay and fungi (Kirker et al 2016;Won et al 2016). Therefore, accurate moisture evaluation and monitoring are required to secure and maintain the stability of wooden structures, which are being built larger with the developments in wood engineering.…”

Section: Introductionmentioning

confidence: 99%

Investigation of electrical characteristics using various electrodes for evaluating the moisture content in wood

Hwang

Lee

et al. 2021

BioRes

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Electrical resistance and resistivity were measured with various types of electrodes to evaluate the moisture content of wood. The conventional two-pin method, electrically conductive fabrics, and multi-pin electrodes were used to measure the electrical resistance of Japanese larch (Larix kaempferi) wood, and a four-pin probe was used for resistivity measurements. The resistance in the longitudinal direction measured with the two-pin electrode was slightly affected by the dimensions of the wood sample, whereas the resistance measured with the conductive fabric and multi-pin electrodes was clearly affected by the end surface area in contact with the electrode and the length between electrodes. The resistivity calculated from the relationship between the electrical resistance and sample dimensions also showed differences based on the sample dimensions. The least squares regression model trained with the resistance data based on the two-pin method predicted the moisture content with a high coefficient of determination of 0.986. The four-pin probe produced the most stable resistivity regardless of the sample dimensions, making it a feasible approach for the moisture evaluation of large wood members.

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Section: Introductionmentioning

confidence: 99%

Investigation of electrical characteristics using various electrodes for evaluating the moisture content in wood

Hwang

Lee

et al. 2021

BioRes

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“…Wood properties can be improved through manufacturing glued laminated lumber (glulam) (Hendrik et al, 2016), impregnating cell voids with a polymer such as polystyrene (Hadi et al, 1998) or methyl methacrylate (MMA) (Hadi et al, 2013), phenol formaldehyde impregnation on soft-inner part of oil palm trunk (Hartono Physical and Mechanical Properties of Methyl Methacrylate-Impregnated Wood from Three Fast-Growing Tropical Tree Species -325 -et al, 2016), immersion treatment with pyroligneous liquor of sapwood (Won et al, 2016) and chemically modifying wood through acetylation (Hadi et al, 1995) or treatment with furfuryl alcohol (Hadi et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Physical and Mechanical Properties of Methyl Methacrylate-Impregnated Wood from Three Fast-Growing Tropical Tree Species

Hadi¹,

Massijaya²,

Zaini³

et al. 2019

Journal of the Korean Wood Science and Technology

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Timber from plantation forests has inferior physical and mechanical properties compared to timber from natural forest because it is mostly from fast-growing tree species that are cut at a young age. Filling cell voids with methyl methacrylate (MMA) can improve the wood properties. The purpose of this study was to determine the physical and mechanical properties of MMA-impregnated wood from three fast-growing wood species, namely jabon (Anthocephalus cadamba (Roxb.) Miq.), mangium (Acacia mangium Willd) and pine (Pinus merkusii Jungh. & de Vriese). Wood samples were either immersed in MMA monomer or impregnated with it and then heated to induce the polymerization process. Jabon, which was the lowest density wood, had the highest polymer loading, followed by pine and mangium. The physical and mechanical properties of samples were affected by wood species and the presence of MMA, with higher-density wood having better properties than wood with a lower density. Physical and mechanical properties of MMA wood were enhanced compared to untreated wood. Furthermore, the impregnation process was better than immersion process resulting the physical and mechanical properties. Based on MOR values, the MMA woods were one strength class higher compared to untreated wood with regard to Strength Classification of Indonesian Wood.

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“…Wood, as a natural material, has various excellent properties and has been extensively utilized over centuries. However, wood is easily subjected to biodeterioration caused by microorganisms (Cao and Yu, 2010;Lee et al, 2017;Won et al, 2016;Won et al, 2017), which greatly limits its utilization. An effective way to provide wood with decay resistance in practice is by treating with preservative (Humar and Lesar, 2008;Kartal et al, 2015;Lee et al, 2016;Sen et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Decay of Populus cathay Treated with Paraffin Wax Emulsion and Copper Azole Compound

Liu¹,

Liu²,

Hou³

et al. 2019

Journal of the Korean Wood Science and Technology

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In order to investigate the decay process of wood treated with preservative, waterproofing agent and their compound systems, a full-cell process was applied to impregnate the sapwood of poplar (Populus cathay) at paraffin wax emulsion concentrations of 0.5% and 2.0%, Copper Azole (CA) concentrations of 0.3% and 0.5%, and their four compound systems, respectively. Leaching tests and laboratory decay resistance against the white-rot fungus Corious versicolor (L.) Murrill for treated wood were carried out according to the America Standard E11-06 and China Standard GB/T 13942.1-2009. At certain time intervals during the decay test, samples were characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction technique (XRD) to investigate the time-dependent changes of chemical components and crystalline structure, thus clarifying the decay mechanisms. The results suggested that white-rot fungi degrade hemicellulose and lignin in the wood cell wall first, followed by a simultaneous degradation of polysaccharides and lignin. Besides, CA could not only slower the decomposition of both hemicellulose and lignin, but also reduce the degradation amount of hemicellulose. However, paraffin wax emulsion at high concentration had a negative effect on the impregnation of CA for the compound system treated wood.

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Evaluation of Sapwood and Heartwood Decay Resistance after Immersion-Treatment with Pyroligneous Liquor

Cited by 3 publications

References 17 publications

Investigation of electrical characteristics using various electrodes for evaluating the moisture content in wood

Investigation of electrical characteristics using various electrodes for evaluating the moisture content in wood

Physical and Mechanical Properties of Methyl Methacrylate-Impregnated Wood from Three Fast-Growing Tropical Tree Species

Decay of Populus cathay Treated with Paraffin Wax Emulsion and Copper Azole Compound

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