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http://dx.doi.org/10.5658/WOOD.2013.41.3.173

Measuring PEG Retentions and EMCs of PEG Impregnated Softwood Specimens after Heat-treatment  

Hong, Seung-Hyun (Dept. of Bio-based Materials, Chungnam National University)
Kim, Chung-Ho (Dept. of Formative Design, Kongju National University)
Lim, Ho-Mook (Dept. of Bio-based Materials, Chungnam National University)
Kang, Ho-Yang (Dept. of Bio-based Materials, Chungnam National University)
Publication Information
Journal of the Korean Wood Science and Technology / v.41, no.3, 2013 , pp. 173-180 More about this Journal
Abstract
This study was carried to provide basic data for the research of the effect of PEG impregnation on preventing wood from cracking during heat treatment. Three popular softwood species were selected for investigating the PEG penetration rate and retention depending on PEG molecular weight, PEG retention after heat treatment and their EMCs. The average retentions of PEG400 were reversely proportional to the basic densities of three species and those of the other PEGs showed similar behaviour as well. It is obvious that PEG retention decreased as PEG molecular weight increased with a species. PEG impregnation increased or decreased the moisture contents of the specimens within 2%, and increased their basic densities by 16.8% as a maximum. The Weight Percentage Losses of PEG400 during heat treatment were the largest among three PEG levels, which implied that lower molecular weight PEG leached more than the highers. There was less difference in EMC between PEG impregnated and control specimens at low RH, but their difference increased at high RH.
Keywords
polyethylene glycol (PEG); impregnation; heat treatment; sorption isotherm; saturated salt solution method; Pinus densiflora; Pseudotsuga menziesii; Tsuga heterophylla; basic density;
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Times Cited By KSCI : 1  (Citation Analysis)
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