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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Wood Science and Technology
Journal Basic Information
Journal DOI :
The Korean Society of Wood Science Technology
Editor in Chief :
Volume & Issues
Volume 42, Issue 6 - Nov 2014
Volume 42, Issue 5 - Sep 2014
Volume 42, Issue 4 - Jul 2014
Volume 42, Issue 3 - May 2014
Volume 42, Issue 2 - Mar 2014
Volume 42, Issue 1 - Jan 2014
Selecting the target year
Characteristics of Volatile Organic Compounds and Aldehydes Emission from Yellow poplar (Liriodendron tulipifera L.)
Lee, Min ; Park, Sang-Bum ; Lee, Sang-Min ; Son, Dong-Won ;
Journal of the Korean Wood Science and Technology, volume 42, issue 4, 2014, Pages 357~366
DOI : 10.5658/WOOD.2014.42.4.357
Based on fundamental properties and machining characteristics of Yellow poplar (Liriodendron tulipifera L.), it has well performance on machinability or workability, drying, and fine surface. Additionally, yellow poplar is light weight and has bright color with high performance of bending processing, so it could be used for furniture or artworks materials and wood-based panel materials. Recently, public attention has been focused on indoor air quality, and Ministry of environment drift more tight regulation on indoor air quality for an apartment house and public facility with the times. Construction materials has been assessed emission of volatile organic compounds (VOCs) and formaldehyde according to law (No.10789), so yellow poplar is also needed to assess these emission characteristics. Emission of VOC and aldehyde compounds from dry and green wood condition of yellow poplar were investigated with KS M 1998:2009. Based on results, more than 30 compounds were detected from yellow poplar, and lower NVOC (natural VOC) were emitted than AVOC (Anthropogenic VOC) and OVOC (other VOC). Formaldehyde emission was lower than
and acetaldehyde, ketone, and propionaldehyde were detected from yellow poplar. From dry yellow poplar, m-Tolualdehyde (
) was additionally detected while no detection of propionaldehyde. After drying process, amount of ketone emission increased significantly. The unique smell of yellow poplar may not only come from emission of acetaldehyde and propionaldehyde.
Elasto-plastic Anisotropic Wood Material Model for Finite Solid Element Applications
Hong, Jung-Pyo ; Kim, Chul-Ki ; Lee, Jun-Jae ; Oh, Jung-Kwon ;
Journal of the Korean Wood Science and Technology, volume 42, issue 4, 2014, Pages 367~375
DOI : 10.5658/WOOD.2014.42.4.367
A simplified material model, which was efficiently implemented in a three-dimensional finite solid element (3D FE) analysis for wood was developed. The bi-linear elasto-plastic anisotropic material theory was adopted to describe constitutive relations of wood in three major directions including longitudinal, radial and tangential direction. The assumption of transverse isotropy was made to reduce the requisite 27 material constants to 6 independent constants including elastic moduli, yield stresses and Poisson's ratios in the parallel, and perpendicular to grain directions. The results of Douglas fir compression tests in the three directions were compared to the 3D FE simulation incorporated with the wood material model developed in this study. Successful agreements of the results were found in the load-deformation curves and the permanent deformations. Future works and difficulties expected in the advanced application of the model were discussed.
Effect of Nanocellulose and Aminated Starch on Tensile and Thermal Properties of Plasticized Starch Film
Kim, Bo-Yeon ; Han, Song-Yi ; Lee, Sung-Yong ; Kim, Young-Kyoon ; Kim, Nam-Hun ; Lee, Seung-Hwan ;
Journal of the Korean Wood Science and Technology, volume 42, issue 4, 2014, Pages 376~384
DOI : 10.5658/WOOD.2014.42.4.376
This study investigated the effect of nanocellulose, such as microfibrillated cellulose (MFC) and cellulose nanocrystal (CNC), and aminated starch on tensile property and thermal stability of plasticized starch film. Glycerol (23 wt%) was used as a plasticizer and nanocelluloses of 1-30 parts per hundred parts of resin (phr) in the basis of plasticized starch were added. Tensile strength and elastic modulus increased with increasing nanocellulose addition amount, whereas elongation at break decreased. Tensile properties of MFC-reinforced starch film were higher than those of CNC-reinforced film. Optimum addition amount of aminated starch, which is commonly used for paper sizing, to improve tensile property of film, was found to be 5%. And 1% addition of aminated starch showed the best effect in the improvement of tensile property of the film. Thermal stability was improved with the addition of MFC to plasticized starch film with and without aminated starch.
Bending and Compressive Strength Properties of Larix kaempferi According to Thinning Intensity
Chong, Song-Ho ; Won, Kyung-Rok ; Hong, Nam-Euy ; Park, Byung-Su ; Lee, Kyung-Jae ; Byeon, Hee-Seop ;
Journal of the Korean Wood Science and Technology, volume 42, issue 4, 2014, Pages 385~392
DOI : 10.5658/WOOD.2014.42.4.385
The purpose of this study was to determine the effects of plantation thinning on physical and mechanical properties of Larix kaempferi. Tree samples were obtained from unthinned, moderately, heavily thinned plantations where located in Kwangryung forest research stand. The effects of different thinning methods on the bending and parallel to grain compressive strengths of Larix kaempferi were explored. Average latewood ratio with various thinning treatments revealed the trend of unthinning < moderate thinning < heavy thinning treatment. Average annual ring width with various thinning treatments showed the trend of unthinning < moderate thinning or heavy thinning treatment. Average bending and parallel to grain compressive strengths with various thinning treatments revealed the trend of unthinning > moderate thinning > heavy thinning treatment. This indicates that thinning treatment reduces average bending and parallel to grain compressive strength properties.
Flame Retardant Treatment's Effects and Detection Method on Wooden Buildings' Pigment Layer (Dan-cheong)
Kim, Dae Woon ; Kim, Chul Woong ; Han, Sung Hee ; Chung, Yong Jae ; Han, Gyu Seong ;
Journal of the Korean Wood Science and Technology, volume 42, issue 4, 2014, Pages 393~406
DOI : 10.5658/WOOD.2014.42.4.393
To figure out the problems of flame retardant treatment (FRT) on wooden buildings, field investigation and analysis of statistical data are performed. After FRT on historical wooden building, efflorescence and exfoliation showed most often. These problems appeared especially on column, rafter and Ga-gu (Ingredients for supporting structure of a roof) which are liberally spreaded. To compare before and after FRT, analyzed 20 elements using P-XRF. In this process, found sulfur which informs FRT. This helped set up nondestructive assay. Through this process, confirmed field application by analysis residue component of Songgwang-sa Temple.
Moisture Content Change and Heat Distribution Characteristics of Veneer Heated by Microwave
Shin, Ki-Hoon ; Suh, Jin-Suk ; Park, Cheul-Woo ; Lim, Nam-Gi ;
Journal of the Korean Wood Science and Technology, volume 42, issue 4, 2014, Pages 407~419
DOI : 10.5658/WOOD.2014.42.4.407
The analysis of shape before and after heating, Surface moisture content, Moisture weight change and surface heat distribution by fixed type microwave heating in forms of flat veneer and veneer roll of Korean pine, pitch pine, larch and yellow poplar was conducted. The results were as follows: In case of flat veneer, the quality after microwave heating was comparatively good, but it was somewhat warped. These phenomena may be due to transformation by nonuniform drying stress and stronger effect of local irradiation on the veneers when heating veneer owing to the characteristics of fixed type microwave equipment. In case of the features of roll-shaped veneer heated by microwave, the quality after heating was comprehensively excellent. Especially there was no warping unlike flat veneer. Heat distribution and diffusion were also very stable for roll-shaped veneer and such heat distribution had much influence on surface moisture content and moisture weight loss. Accordingly, the veneer roll would show sufficient drying efficiency in fixed type microwave equipment through a scrutinized examination on generating power and irradiation time according to species and thickness of veneer.
Properties of Sawdust-Rice Husk Mixed Ceramic According to The Rice Husk Mixing Ratios
Oh, Seung Won ;
Journal of the Korean Wood Science and Technology, volume 42, issue 4, 2014, Pages 420~427
DOI : 10.5658/WOOD.2014.42.4.420
The physical and mechanical properties of sawdust-rice husk mixed ceramic were investigated with rice husk mixing ratios. The mixed ceramic board was produced with carbonization and resin impregnated sawdust-rice husk board at high temperature. At the same percentage of resin impregnation condition, density and bending strength of the mixed ceramic board increased with increasing the mixing rates of rice husk, whereas weight loss of the ceramic boards decreased. At the same temperature condition for the carbonization of resin impregnated sawdust-rice husk board, the density and bending strength were the highest with 40% of rice husk mixing ratio.
Optimal Medium Composition of Cauliflower Mushroom (Sparassis latifolia) Cultivation Using Douglas Fir Wood Chip and Comparison of The β-glucan Contents of The Fruiting Body
Wang, Seung-Jin ; Kim, Hyun-Seok ; Wi, An-Jin ; Yoon, Byung-Sun ; Park, Whoa-Shig ; Park, Hyeong-Ho ; Oh, Deuk-Sil ;
Journal of the Korean Wood Science and Technology, volume 42, issue 4, 2014, Pages 428~438
DOI : 10.5658/WOOD.2014.42.4.428
Functional effects of cauliflower mushroom (Sparassis latifolia) have been magnified by various media and internal and external research papers, recently. So, optimum condition of wood chip particle size and cultivation method of high
-glucan content for bulk cultivation generalization of cauliflower mushroom farms researched. As a result, T7 (1~2 mm 25%, 2~4 mm 50%, over 4 mm 25%) media as mixed media of certain ratio of particle size, showed excellent growth at
cm / 44 days. Also, production of fruit body found higher than control and marketable pileus part took 85% ratio. The
-glucan content at media composition condition showed 1.4~2.4 times higher content in stipe part than pileus part. Also, PCF300 medium found 59.5% highest
-glucan content in stipe part. While
-glucan content showed 33.0% low content in pileus part. Therefore it needed additional study that
-glucan content improved in pileus part. In conclusion, production of high
-glucan content cauliflower mushroom was possible by T7 condition (wood chip particle size: 1~2 mm 25%, 2~4 mm 50% and over 4 mm 25%, composition: corn powder, flour and 300 ppm yeast).
Basic Study on Oversea Biomass Energy Resources 1 - Palm Biomass
Lee, Hyoung Woo ;
Journal of the Korean Wood Science and Technology, volume 42, issue 4, 2014, Pages 439~449
DOI : 10.5658/WOOD.2014.42.4.439
RPS (Renewable Portfolio Standard) has increased wood pellet demand dramatically in recent years in Korea where self-supply rate of wood pellet is not more than 10%. However global production capacity of wood pellet is prospected to be unable to meet the global demand after 2020. Therefore it is urgently needed to develop new sustainable biomass energy resources which can replace wood pellet at lower cost. As a result of this study EFB (empty fruit bunch) and MF (mesocarp fiber), the representative solid palm biomass, are estimated to be generated at the rate of 20 and 28 million tons per year (based on 10% moisture content) in Malaysia and Indonesia, respectively in 2012. Total annual generation rate of EFB and MF is estimated as 48 million tons per year only in Malaysia and Indonesia in 2012. With calorific value of over 90% of wood pellet EFB is expected to be a excellent biomass energy resource which can replace wood pellet. EFB can be utilized as fuel for power generation or industrial purpose. However EFB may not be a proper fuel for domestic and greenhouse heating because of its high ash content.
Pb(II) Removal from Aqueous Solutions Using Pinewood and Oakwood
Um, Byung-Hwan ; Jo, Sung-Wook ; Park, Seong-Jik ;
Journal of the Korean Wood Science and Technology, volume 42, issue 4, 2014, Pages 450~459
DOI : 10.5658/WOOD.2014.42.4.450
Crushed pinewood and oakwood were studied as an adsorbent for Pb(II) removal from aqueous solution. Batch adsorption experiments were carried out to describe the effects of contact time, initial Pb(II) concentration, pH, competing cations, and adsorbent dosage on the Pb(II) adsorption process. Kinetic studies revealed that the Pb(II) adsorption process for pinewood and oakwood followed both pseudo first and pseudo second order model. The Fruendlich model best described equilibrium adsorption data with correlation coefficients (
) of 0.956 and 0.950 for pinewood and oakwood. The maximum adsorption capacity of Pb(II) onto pinewood and oakwood was found to be 16.853 and 27.989 mg/g, respectively. The Pb(II) adsorption onto both pinewood and oakwood was increased as pH increased in the pH range 3-9. The presence of cations such as
decreased Pb(II) adsorption. The Pb(II) removal was greater in seawater than deionized water, resulting from the presence of
ions in seawater. This study showed that pinewood and oakwood have a potential application in the remediation of Pb(II) contaminated water.
Studies on Manufacture of Mineral Water with Wood Charcoals
Shin, Soo-Jeong ; Kim, Byung-Ro ;
Journal of the Korean Wood Science and Technology, volume 42, issue 4, 2014, Pages 460~466
DOI : 10.5658/WOOD.2014.42.4.460
To evaluate wood charcoal as raw material for mineral water production, dissolution of inorganic ions from charcoal to water, pH and adsorption ability of chlorine in water were investigated as main variables. More potassium ion was dissolved in water as higher temperature manufactured charcoal but other ions showed no difference with different charcoal making temperatures. Highest dissolved cation was potassium followed by calcium and sodium. Among wood species, charcoal from Quercus variabilis and Platanus occidentalis showed significantly higher potassium content in water than that of larch, red pine and white pine. Other cations had similar pattern to the potassium but their difference was not apparent as much as potassium. pH value of water treated with charcoal was higher for wood charcoals from Platanus occidentalis (pH 8.5) and Quercus variabilis (pH 8.4) which contained higher inorganic cations. In chlorine removal in water by charcoal, all wood charcoals showed greater chlorine removal than that of the control, but softwood charcoals resulted in higher removal than those of hardwoods. There was no significant difference in the dissolution of cations and pHs between particle charcoal and whole charcoal. With easy of control, whole charcoal is better for mineral water making raw material than particle charcoal does.
Physical and Mechanical Properties of Major Plantation and Promising Tree Species Grown in Indonesia (I)
Kim, Jong-Ho ; Jang, Jae-Hyuk ; Ryu, Jae-Yun ; Febrianto, Fauzi ; Hwang, Won-Joung ; Kim, Nam-Hun ;
Journal of the Korean Wood Science and Technology, volume 42, issue 4, 2014, Pages 467~476
DOI : 10.5658/WOOD.2014.42.4.467
The physical and mechanical characteristics of 10 Indonesian wood species were investigated. Mangium, Gandaria and Rambutan showed higher density. Mangium, Gandaria and Mangga appeared lower in shrinkage, and the ratio of tangential/radial was low in Albizia, Kupa and Mangga. The compression strength parallel to the grain and hardness were high in Mangium and Nangka. Gmelina, Mangium, Gandaria, Kupa, Nangka and Rambutan had valuable properties for commercial wood materials. Consequently, it is considered that the results of this study could be useful basic data for the improved use of planted and promising species in Indonesia.
Performance of Structural Glulam Manufactured with Fire Retardants Treated Lumbers
Son, Dong-Won ; Eom, Chang-Deuk ; Park, Jun-Cheol ; Park, Joo-Saeng ;
Journal of the Korean Wood Science and Technology, volume 42, issue 4, 2014, Pages 477~482
DOI : 10.5658/WOOD.2014.42.4.477
Consumer demand for wood use has diversified recently. Laminated wood has been used for large-scale buildings and public buildings, not only the durability but also the demand for fire safety has increased. In this study. it was performed for the purpose of developing a standard and flame-retardant treatment technology suitable for structural laminated wood, which was prepared in domestic larch. In this study, by using the domestic larch and Korean pine lumber which treated with flame-retardants, to manufacture the glulam, the effect of strength properties were investigated. In the case of fire retardant treated larch Glulam was satisfactory conditions of the strength of structural laminated wood, but had to be improved, such as the occurrence of delamination and decrease strength by the flame retardant treatment. Development of application-type flame retardant treatment technology or injection-type flame retardant treatment after production of laminated lumber were required.
Effect of pMDI as Coupling Agent on The Properties of Microfibrillated Cellulose-reinforced PBS Nanocomposite
Jang, Jae-Hyuk ; Lee, Seung-Hwan ; Kim, Nam-Hun ;
Journal of the Korean Wood Science and Technology, volume 42, issue 4, 2014, Pages 483~490
DOI : 10.5658/WOOD.2014.42.4.483
The effect of microfibrillated cellulose (MFC) content and coupling agent (polymeric methylene diphenyl diisocyanate, pMDI) on the properties of MFC-reinforced polybutylene succinate (PBS) nanocomposite. With increasing MFC content, tensile strength and elastic modulus were increased. More than 1.5 times in tensile strength of PBS/MFC(70/30) nanocomposite was improved by the addition of pMDI (1 phr), compared to the nanocomposite without pMDI. This trend was being significant in nanocomposite with higher MFC content. Thermal stability of the nanocomposite was increased by the addition of pMDI. These improvements is considered to be due to the improvement of MFC dispersion and interfacial adhesion between MFC and PBS matrix.
Adsorption Characteristics of Alkaline Copper Quat Preservative Components in Wood
Lee, Jong-Shin ; Choi, Gwang-Sik ;
Journal of the Korean Wood Science and Technology, volume 42, issue 4, 2014, Pages 491~498
DOI : 10.5658/WOOD.2014.42.4.491
In order to obtain basic data for concentration control of alkaline copper quat (ACQ) solution in wood preservative treatment, this study investigates the change of concentration and adsorption of treating solution and active ingredient, copper oxide (CuO) and didecyldimethyl ammonium chloride (DDAC), in the process of recycling of ACQ solution. Japanese larch (Larix leptolepis), Douglas-fir (Psedotsuga menziesii) and Radiata pine (Pinus radiata) were treated with ACQ solution. The active ingredient concentration of ACQ solution was decreased continuously with increase of recycling. There are differences between extent of concentration decrease of Cu (as CuO) and DDAC. DDAC was decreased more quickly and to a higher degree than Cu for all recycling. The extent of DDAC concentration decrease was remarkable than that of Cu for wood species. The amount of DDAC adsorbed into wood decreased with the increase of ACQ solution recycling, but adsorption of Cu was little difference regardless of recycling. The adsorption of Cu into wood increased as DDAC concentration decrease by recycling of ACQ solution. This is likely due to decrease of DDAC competition with Cu for the same reaction site in wood.