Evaluation of pit dimensions and uptake of preservative solutions in wood after permeability improvement by bioincising

Bakır, Davut; Doğu, Dilek; Kartal, S. Nami; Terzi, Evren

doi:10.1080/17480272.2021.2014956

Cited by 7 publications

(6 citation statements)

References 31 publications

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“…To better understand this case, extensive wood chemistry analyses are needed for the type and amount of wood chemical components degraded after P. vitreus fungal activity. Although many studies have been conducted on the effects of P. vitreus fungus on the permeability, physical, mechanical, and anatomical properties of wood (Lehringer et al 2010;Lehringer 2011;Lehringer et al 2011;Fuhr et al 2012;Gilani et al 2014;Emaminasab et al 2016;Bakir et al 2021;Tajrishi et al 2021;Bakir et al 2022aBakir et al ,b, 2022a, studies on wood chemical components seem to be limited.…”

Section: Effects Of Biological Incision Pretreatment On Wood Anatomymentioning

confidence: 99%

Anatomical structure and copper microdistribution in mechanical, biological, and laser incised spruce and larch refractory woods

Bakır

2023

BioRes

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The anatomical structure of wood and the application of three different incision pretreatments affect the distribution of preservatives in refractory woods. This study focused on Picea orientalis (L.) Peterm.) and Larix decidua Mill. and investigated the distribution of copper-based preservatives in the wood microstructure. Different incision pretreatments were applied before impregnation to increase the permeability of spruce and larch sapwood samples. After the incision pretreatments, transverse cross-sectional surfaces of the samples were sealed with polyurethane-based paint to prevent excessive preservative uptake into open ends of longitudinal tracheid lumens. The samples were then impregnated with Celcure C4, by applying a vacuum method. The structure of wood samples with preservatives before and after the incision pretreatments were observed. Copper microdistribution was observed to increase significantly in refractory wood species after different incision pretreatments, especially in larch wood. The degradation of pits caused by biological incision effectively increased the microdistribution of copper. The difference in the microdistribution of increased copper with the laser and mechanical incision pretreatments – following the same incision model – was attributed to the different anatomical structure and density of spruce and larch wood species and the fact that the hole depth and geometry were different in the laser and mechanical incision processes.

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Section: Effects Of Biological Incision Pretreatment On Wood Anatomymentioning

confidence: 99%

Anatomical structure and copper microdistribution in mechanical, biological, and laser incised spruce and larch refractory woods

Bakır

2023

BioRes

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“…Yang and Liu used CO 2 supercritical treatment on eucalyptus under different pressure conditions, which opened up more bordered pits in the wood and increased its permeability. , However, these pressure treatment methods tend to increase permeability by damaging pit membranes on cell walls and creating cracks in the cell wall, , which can lead to a decrease in the mechanical properties of the wood. ,, Therefore, some studies have turned to using biologically-based methods with relatively mild conditions to treat wood. These methods involve targeted degradation of pit membranes and pit plugs in wood using bacteria, fungi, or enzymes to improve permeability. , Schwarze et al treated heartwood of spruce and pine with Physisporinus vitreous fungus, and as treatment time increased, there was a gradual increase in wood mass change rate, improved permeability, and increased water absorption capacity of the heartwood . However, biological treatments often have longer treatment cycles, and it can be difficult to control the growth process of certain microorganisms, which may cause discoloration on the wood surface .…”

Section: Introductionmentioning

confidence: 99%

“…These methods involve targeted degradation of pit membranes and pit plugs in wood using bacteria, fungi, or enzymes to improve permeability. 18,19 absorption capacity of the heartwood. 20 However, biological treatments often have longer treatment cycles, and it can be difficult to control the growth process of certain microorganisms, which may cause discoloration on the wood surface.…”

Section: Introductionmentioning

confidence: 99%

Effect of NaOH Pretreatment on Permeability and Surface Properties of Three Wood Species

Qi,

Zhou,

et al. 2023

ACS Omega

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To improve the permeability of wood, three chemical reagents were used to pretreat Chinese fir, white oak, and poplar. Through a factorial experiment with the mass change rate of the wood as the indicator, NaOH was preliminarily selected as the pretreatment agent. Further orthogonal experiments were conducted to explore the effects of NaOH concentration, temperature, and treatment time on the mass change rate, dye uptake rate, transverse dye penetration rate, and color difference of the wood. A fuzzy, comprehensive analysis was used to optimize the pretreatment process. The results showed that after NaOH pretreatment, the highest mass change rates of Chinese fir, white oak, and poplar were 11.30, 10.66, and 8.53%, respectively. Compared with untreated wood, the dye uptake rate of three wood species increased by 1.05, 1.43, and 1.13 times, respectively; the radial dye penetration rate increased by 5.05, 4.14, and 3.38 times, respectively; and the tangential dye penetration rate increased by 3.91, 3.45, and 3.84 times, respectively. These findings indicate an enhancement in permeability for all three wood species following NaOH pretreatment. The brightness of the three wood species decreased after NaOH pretreatment, while the yellow and red colors increased in Chinese fir and poplar and decreased in white oak. Scanning electron microscopy showed that pits in the wood opened after pretreatment, while extractives decreased. Infrared spectroscopy analysis indicated varying degrees of extraction effects from NaOH pretreatment across the three wood species, along with increased active hydroxyl groups within the wood structure. X-ray diffraction analysis revealed that NaOH dissolved noncrystalline substances in wood, leading to improved crystallinity. These experimental findings provide essential data for future endeavors in wood pretreatment and subsequent staining processes.

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“…However, the use of them is not always desired due to operating costs and qualities of treated wood [17,23]. The biological method is a potential technique to improve wood treatability by the application of enzymes [24][25][26], bacteria [27][28][29], and fungi [30][31][32][33][34][35][36][37][38][39][40][41][42][43]. An increase in wood permeability is supposedly induced by the selective degradation of pit membranes in the bordered and halfbordered pits, entailing only negligible changes in the tracheid cell wall [33,38].…”

Section: Introductionmentioning

confidence: 99%

“…Picea abies inoculated with a white-rot fungus Physisporinus vitreus for six weeks showed a significant improvement in permeability and only a slight decrease in bending strength [32]. Bioincising with P. vitreus has also shown promise in the heartwood of Norway spruce [35], Douglas fir compression wood [40], and Oriental spruce heartwood [43]. Dichomitus squalens, a white-rot basidiomycete, was used to successfully improve permeability and penetration in Norway spruce heartwood [30] and spruce lumber [11].…”

Section: Introductionmentioning

confidence: 99%

Treatability Changes of Radiata Pine Heartwood Induced by White-Rot Fungus Trametes versicolor

Fang

Xiong

et al. 2023

Forests

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Desired retention and depth into wood are necessary for wood preservatives to provide long-term durability. In general, heartwood of wood is difficult to treat, and bioincising was investigated as a potential technique to improve the treatability of refractory wood and heartwood. In order to study the effects of bioincising treatment with white-rot fungus Trametes versicolor on the pore structure and treatability of radiata pine heartwood, this research conducted tests of mass loss, microscopic structures, pore structure parameters, uptake, and penetration of preservative of radiata pine heartwood specimens incubated by T. versicolor for 4, 8, and 12 weeks. The results showed that the optimal inoculation time of T. versicolor bioincising on radiata pine heartwood was 4 to 8 weeks. At this time, the retention of injected preservatives increased by 5.01%–17.73%, the penetration depth of preservatives increased significantly, and the corresponding mass loss was 3.04%–6.45%. The results of microstructure and pore structure showed that T. versicolor entered the adjacent tracheids via apertures, with less impact on the cell wall, mainly degrading pit membranes and ray parenchyma cells early in the inoculation of radiata pine heartwood. As the structures impeding fluid flow were connected, the porosity of the wood and the range of the main pore size distribution increased significantly, thus increasing the treatability of radiata pine heartwood.

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Evaluation of pit dimensions and uptake of preservative solutions in wood after permeability improvement by bioincising

Cited by 7 publications

References 31 publications

Anatomical structure and copper microdistribution in mechanical, biological, and laser incised spruce and larch refractory woods

Anatomical structure and copper microdistribution in mechanical, biological, and laser incised spruce and larch refractory woods

Effect of NaOH Pretreatment on Permeability and Surface Properties of Three Wood Species

Treatability Changes of Radiata Pine Heartwood Induced by White-Rot Fungus Trametes versicolor

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