Dimensional Stability of Several Wood Species Treated with Vinyl Monomers and Polyethylene Glycol-1000

Alma, Mehmet Hakkı; Lu, Hung‐Hsun; Maldas, D.

doi:10.1080/00914039608029385

Cited by 19 publications

(9 citation statements)

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“…Therefore, PEG played an important part in retraining the surface checks. This was in agreement with the observations of other researchers (Stamm 1959;Mackay 1972;Alma et al 1996;Hoadley 2000).…”

Section: Surface Checksupporting

confidence: 83%

“…This method is called the PEG drying method. Surface checks are prevented by the PEG drying method because shrinkage is inhibited by PEG penetration of the wood cell walls (Stamm 1959;Mackay 1972;Alma et al 1996;Hoadley 2000;Jena and Gupta 2002). The hydroxyl groups of cellulose in the wood cell walls bond easily with the oxygen of ether groups in PEG as a water-bone nonionic surface active agent, resulting in the loss of water molecules (Ralph 2006).…”

Section: Introductionmentioning

confidence: 99%

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Polyethylene Glycol Treatment of Han-Ok Round Wood Components to Prevent Surface Checking

Huang

Lee²,

Jang

et al. 2017

BioResources

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The effect of polyethylene glycol (PEG) treatment was investigated relative to surface checks of red and Korean pine round wood for building Koreanstyle homes. The logs used for this study were impregnated with a solution of PEG-1000 for three weeks, and then they were dried to a moisture content of about 15% at the temperature of 120 °C within the drying time of 49 h. During the middle stage of drying, slight surface checks were found on red pine PEG-treated logs compared with severe surface checks on red pine control logs. Due to PEG treatment and high drying temperature, at the end of drying, apparent surface check was not found on red pine PEG-treated logs compared with serious surface checks on the corresponding control log. No surface checks were discovered on Korean pine logs during and after drying due to the PEG effect. Thus, PEG treatment was effective in preventing surface checks on red and Korean pine logs during drying at high temperature.

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Section: Surface Checksupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Polyethylene Glycol Treatment of Han-Ok Round Wood Components to Prevent Surface Checking

Huang

Lee²,

Jang

et al. 2017

BioResources

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“…Low molecular weight PEG has been used for improving dimensional stability of wood (Mackay, 1972;Alma et al, 1996;Ralph, 2006). Thus molecular weight 1,000 was selected for this experiment.…”

Section: Peg Impregnationmentioning

confidence: 99%

“…PEG has been recommended to reduce drying defects of wood (Stamm, 1959;Mitchell and Wahlgren, 1959;Mackay, 1972;Alma et al, 1996). Mitchell and Iverson (1961) and Ralph (2006) applied it for defect-free drying of wood carvings and a refractory species, Eucalyptus regnans.…”

Section: Introductionmentioning

confidence: 99%

Effect of Pretreatments on Reducing Surface Cracks of Heat-treated Western Hemlock Roundwoods

Kim¹,

Kang²,

강석구³

et al. 2012

Journal of the Korean Wood Science and Technology

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A large diameter roundwood is an important element of Korean traditional buildings, Hanok, and is hard to be dried without surface cracks. Four different pretreatments, such as pre-cracking, oil heating, kerfing-oil heating and PEG impregnation, were investigated for reducing the surface cracks of large-diameter roundwood specimens during heat treatment. The roundwood specimens of pre-cracking, oil heating and kerfing-oil heating showed surface cracks during pretreatment, but that of PEG impregnation did not. It was confirmed that kerfing reduced the total crack width. Among the four pretreatments and control only the PEG impregnation roundwood specimen had no crack on both outer and inner surfaces after heat treatment. The PEG impregnation specimen shrank only 1.6% in the tangential direction while the pre-cracking did 8.0%.

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“…PEG drying method has been used to reduce the drying defects, that often occurred during air drying and other artificial drying methods, of wood, especially, surface check, because the shrinkage of cell wall was restrained due to PEG penetrating into wood cell wall (Alma et al, 1996;Hardley, 2000;Mackay, 1972;Stamm, 1959). It was found out that after the water molecules were forced out because the hydroxyl group of cellulose in wood cell wall was easily combined with oxygen of ether due to PEG as a water-bone nonionic surface active agent, PEG in cell wall restrained shrinking of cell wall so that the crack or check on the surface of wood could be prevented (Ralph, 2006).…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Drying of Bamboo Tubes Pretreated with Polyethylen Glycol Solution

Kang¹,

Chung²,

Han³

et al. 2017

Journal of the Korean Wood Science and Technology

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This study was conducted to develop a new drying technology in order to quickly and massively dry bamboo tubes without crack and check. The bamboo tubes with the diameter of 45 mm -68 mm had been impregnated in the solution of PEG-1000, and then were dried under room temperature and high temperature, respectively. The cracks occurred on all control specimens while no cracks were found on PEG treated specimens during drying at room temperature due to effect of PEG restraining the circumferential shrinkage of bamboo tube. But the drying period of this method was too long (200 days) compared to 10 hours of kiln drying. During fast high temperature drying, cracks occurred on all control specimens, but no cracks were found on PEG treated specimens, which could be accounted for more solidified PEG due to higher drying temperature and faster drying rate, and the tension set formed on the surface of bamboo tube in the early stage of drying owning to high drying temperature and low relative humidity. Thus, it is advised that PEG treated bamboo tube should be fast dried at high temperature in order to not only prevent crack or check in short drying period but also increase the dimensional stability of the products made of bamboo tubes.

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Dimensional Stability of Several Wood Species Treated with Vinyl Monomers and Polyethylene Glycol-1000

Cited by 19 publications

References 0 publications

Polyethylene Glycol Treatment of Han-Ok Round Wood Components to Prevent Surface Checking

Polyethylene Glycol Treatment of Han-Ok Round Wood Components to Prevent Surface Checking

Effect of Pretreatments on Reducing Surface Cracks of Heat-treated Western Hemlock Roundwoods

High-Temperature Drying of Bamboo Tubes Pretreated with Polyethylen Glycol Solution

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