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Editorial Board & Organization and staffs

한국목재공학회
  • : 한국목재공학회
  • : 목재공학(Journal of the Korean Wood Science and Technology) 50권2호
  • : 연속간행물
  • : 2022년 03월
  • : 148-148(1pages)
목재공학(Journal of the Korean Wood Science and Technology)

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UCI(KEPA)

간행물정보

  • : 공학분야  > 토목공학
  • : KCI등재
  • : SCOPUS
  • : 격월
  • : 1017-0715
  • : 2233-7180
  • : 학술지
  • : 연속간행물
  • : 1973-2022
  • : 2596


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한국학술정보㈜의 모든 학술 자료는 각 학회 및 기관과 저작권 계약을 통해 제공하고 있습니다.

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KCI등재 SCOPUS

1Cover and Contents

저자 : 한국목재공학회

발행기관 : 한국목재공학회 간행물 : 목재공학(Journal of the Korean Wood Science and Technology) 50권 3호 발행 연도 : 2022 페이지 : pp. 1-1 (1 pages)

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2Aims and Scope

저자 : 한국목재공학회

발행기관 : 한국목재공학회 간행물 : 목재공학(Journal of the Korean Wood Science and Technology) 50권 3호 발행 연도 : 2022 페이지 : pp. 1-1 (1 pages)

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3Preparation and Characterization of Hydrophobic Coatings from Carnauba Wax/Lignin Blends

저자 : Junsik Bang , Jungkyu Kim , Yunjin Kim , Jung-kwon Oh , Hwanmyeong Yeo , Hyo Won Kwak

발행기관 : 한국목재공학회 간행물 : 목재공학(Journal of the Korean Wood Science and Technology) 50권 3호 발행 연도 : 2022 페이지 : pp. 149-158 (10 pages)

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To realize the infinite possibilities of materials derived from wood, it is necessary to overcome the weak moisture stability of wood. Thus, the development of an eco-friendly hydrophobic coating agent is essential, and of these, woody biomass-based materials are strongly attractive as coatings. In this study, eco-friendly hydrophobic wood coatings were prepared using carnauba wax purified from palm leaves and sprouts, and kraft lignin. The physicochemical properties of the carnauba wax/lignin blends according to the ratio of carnauba wax and lignin were observed by morphology and functional group change. In addition, the coating performance of carnauba wax/lignin blend coatings was confirmed by measuring the contact angle change. It was found that the addition of lignin could accelerate the atomization of wax particles, and that micro-roughness can be realized when applied to the actual wood surface, to ensure that the coating effect over time lasts longer. In addition, it was confirmed that the addition of lignin increases the hydrogen-bond-based interaction with the wood of the coating, thereby providing better coating stability and increasing the durability of the coating solvent under friction. The carnauba wax/lignin paint developed in this way is eco-friendly because all components are made of wood-based raw materials and have an excellent affinity with wood surfaces. Therefore, it is expected to be applicable to the coating process of wood-plastic composites and timber composites.

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4Characterization of NAD-Dependent Formate Dehydrogenase from Trametes versicolor Using a Cell-Free Protein Expression System

저자 : Su-yeon Lee , Seokyoon Jang , Soo-min Lee

발행기관 : 한국목재공학회 간행물 : 목재공학(Journal of the Korean Wood Science and Technology) 50권 3호 발행 연도 : 2022 페이지 : pp. 159-166 (8 pages)

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CO2 emissions are the primary reason for global warming; hence, biological and chemical technologies for converting CO2 into useful compounds are being actively studied. Biological methods using enzymes can convert CO2 under mild conditions. Formate dehydrogenase (FDH) is a representative CO2 conversion enzyme. Its function was revealed after isolation from bacteria, yeast, and plants. In this study, we evaluated the CO2 conversion potential of FDH isolated from wood-rotting fungi. After isolating the FDH gene (TvFDH) from Trametes versicolor, we cloned the full-length FDH from T. versicolor and expressed it in a cell-free expression system. The gene encoding TvFDH was identified as 1,200 bp open reading frame (ORF) and the expected molecular weight of the protein was approximately 42 kDa. Overexpression of the recombinant crude protein including TvFDH was confirmed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). Enzyme activities and metabolite analyses confirmed the efficiency of TvFDH for CO2 reduction.

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5Influence of Manufacturing Environment on Delamination of Mixed Cross Laminated Timber Using Polyurethane Adhesive

저자 : Dabin Song , Keonho Kim

발행기관 : 한국목재공학회 간행물 : 목재공학(Journal of the Korean Wood Science and Technology) 50권 3호 발행 연도 : 2022 페이지 : pp. 167-178 (12 pages)

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To investigate the influence of manufacturing environment on bonding performance of mixed cross laminated wood (CLT) using polyurethane (PUR) adhesive, a boiling water soak delamination test according to the temperature and relative humidity was conducted. The 5-ply mixed CLT consisted of Japanese Larch for external and middle layer and yellow poplar for internal layer. The PUR adhesives with different opening times of 10 and 30 minutes were used. The mixed CLT was manufactured according to pressing times of PUR and manufacturing environments of summer and winter. In case of summer environment, the delamination rate of the mixed CLT with pressing time of 4 hours using a PUR adhesive with open time of 10 minutes met the requirements of KS F 2081. In case of winter environment, the delamination rate of the mixed CLT didn't meet the requirements of KS standard. However, it was possible to confirm the effect of improving the adhesive performance by adjusting the pressing time according to the open time of the adhesive under the manufacturing conditions. The delamination rate of CLT with open time 30 minutes PUR, manufactured by indirect moisture supply methods was 11.2% better than direct moisture supply methods. As a result of delamination test in the same condition of relative humidity and adhesive, it was found that the temperature of manufacturing environment influences the adhesive performance.

KCI등재 SCOPUS

6Peanut Shells as an Environmentally Beneficial Sound-Absorbing Material

저자 : Eun-suk Jang

발행기관 : 한국목재공학회 간행물 : 목재공학(Journal of the Korean Wood Science and Technology) 50권 3호 발행 연도 : 2022 페이지 : pp. 179-185 (7 pages)

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This study investigated the prospect of using peanut shells as an alternative and green sound-absorbing material. The sound-absorption coefficients were determined after filling impedance tubes of 30, 60, and 90 mm in height with peanut shells. The sound-absorption ability increased as the filling height increased, showing noise reduction coefficient (NRCs) of 0.23, 0.43, and 0.54 for the 30-, 60-, and 90-mm heights, respectively. In addition, for sounds greater than 2,000 Hz, the average sound-absorption coefficient of peanut shells in the 60- and 90-mm heights was 0.9. In summary, peanut shells were found to have good sound-absorption properties comparable to or better than those of bamboo, sisal, jute, and wool, and this research suggests that peanut shells may be useful as an environmentally friendly sound-absorbing material.

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7Use of Pine (Pinus densiflora) Pollen Cones as an Environmentally Friendly Sound-Absorbing Material

저자 : Eun-suk Jang

발행기관 : 한국목재공학회 간행물 : 목재공학(Journal of the Korean Wood Science and Technology) 50권 3호 발행 연도 : 2022 페이지 : pp. 186-192 (7 pages)

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This study examined the utility of pine (Pinus densiflora) pollen cones as an environmentally friendly material with sound-absorbing properties. Pine pollen cone samples with widths of 0.8-1.2 cm and lengths of 3.5-4.5 cm were prepared. After filling impedance tubes to heights of 6, 8, 10, or 12 cm with the pine pollen cones, the sound absorption coefficient of the pine pollen cones was investigated. The peak sound absorption frequency of the samples with a thickness of 6 cm was reached at 1,512 Hz; however, this value shifted to 740 Hz in samples with a thickness of 12 cm. Therefore, the sound-absorbing performance of pine pollen cones at low frequencies improved as the material thickness increased. According to KS F 3503 (Korean Standards Association), the sound absorption grade of pine pollen cones ranges from 0.3 to 0.5 M, depending on the material thickness of the pine pollen cones. In conclusion, the pine pollen cones demonstrated good sound absorption properties. They, thus, may be considered an environmentally friendly sound-absorbing material.

KCI등재 SCOPUS

8Investigation of Wood Species and Conservation Status of Wooden Seated Amitabha Buddha Triad and Wooden Amitabha Buddha Altarpiece of Yongmunsa Temple, Yecheon, Korea (Treasure)

저자 : Jaewan Choi , Junghae Park , Soochul Kim

발행기관 : 한국목재공학회 간행물 : 목재공학(Journal of the Korean Wood Science and Technology) 50권 3호 발행 연도 : 2022 페이지 : pp. 193-217 (25 pages)

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The Wooden Seated Amitabha Buddha Triad and Altarpiece have not been the subjects of definitive species identification and scientific analysis. In this study, visual investigation, portable X-ray fluorescence (p-XRF), species identification, and lacquer layer observations were carried out to determine the original materials and conservation status. Cracks, exfoliation and discoloration were detected during the visual investigation. The p-XRF data indicated that chrome oxide green, malachite, gold, cadmium red, cinnabar, minium, hematite, lead white, ink stick (Carbon), and copper were used for pigments and the coronet accessory. Tilia spp., Abies spp., and Pinus spp. were identified from both the Buddha Triad and Altarpiece. Finally, lacquer layer analyses of the base layer, lacquer layer, orange pigment layer, and gold leaf layer observed modern synthetic pigments likely used in previous conservation. As the Korean Cultural Heritage Charter and the International Charter for the Conservation and Restoration of Monuments and Sites clearly state that objects of cultural heritage must be conserved using their original materials, future conservation of these objects should utilize the data obtained in this study to employ traditional materials. Furthermore, a deterioration map diagnosis can be applied together with the obtained analysis data to understand the conservation status of and inform an appropriate and authentic conservation treatment for the Buddha Triad and Altarpiece.

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9Organization and staffs & Editorial Board

저자 : 한국목재공학회

발행기관 : 한국목재공학회 간행물 : 목재공학(Journal of the Korean Wood Science and Technology) 50권 3호 발행 연도 : 2022 페이지 : pp. 218-218 (1 pages)

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10Copyright

저자 : 한국목재공학회

발행기관 : 한국목재공학회 간행물 : 목재공학(Journal of the Korean Wood Science and Technology) 50권 3호 발행 연도 : 2022 페이지 : pp. 219-219 (1 pages)

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1표지 및 목차

저자 : 한국목재공학회

발행기관 : 한국목재공학회 간행물 : 목재공학(Journal of the Korean Wood Science and Technology) 50권 2호 발행 연도 : 2022 페이지 : pp. 1-1 (1 pages)

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2Aims and scope

저자 : 한국목재공학회

발행기관 : 한국목재공학회 간행물 : 목재공학(Journal of the Korean Wood Science and Technology) 50권 2호 발행 연도 : 2022 페이지 : pp. 1-1 (1 pages)

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3The Relationship between Tree-Ring Growth in Pinus densiflora S. et Z. and the Corresponding Climatic Factors in Korea

저자 : Kwang Hee Lee , Sang Yoon Jo , Soo Chul Kim

발행기관 : 한국목재공학회 간행물 : 목재공학(Journal of the Korean Wood Science and Technology) 50권 2호 발행 연도 : 2022 페이지 : pp. 81-92 (12 pages)

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To analyze the relationship between climatic factors (mean monthly temperature and total precipitation) and tree-ring growths of Pinus densiflora S. et Z. from National Parks (according to region) of the Korea, 20 trees were sampled from 13 National Parks. Only trees that were successfully cross-dated were used for dendrochronological analysis, and at least 11 trees were included. The tree-ring chronology of Mt. Bukhan (covering the shortest period of 1917-2016 [100 years]) was assessed, as well as that of Mt. Seorak (covering the longest period of 1687-2017 [331 years]). After cross-dating, each ring width series was double-standardized by first fitting a logarithmic curve and then a 50-year cubic spline. The relationships between climate and tree-ring growth were calculated with response function analysis. The results show a significant positive correlation between a given year's February-March temperature, May precipitation levels, and tree-ring growth. It indicates that a higher temperature in early spring and precipitation before cambium activity are important for radial growths of Pinus densiflora in the Korea.

KCI등재SCOUPUS

4Effect of Different Conditions of Sodium Chloride Treatment on the Characteristics of Kenaf Fiber-Epoxy Composite Board

저자 : Tamaryska Setyayunita , Ragil Widyorini , Sri Nugroho Marsoem , Denny Irawati

발행기관 : 한국목재공학회 간행물 : 목재공학(Journal of the Korean Wood Science and Technology) 50권 2호 발행 연도 : 2022 페이지 : pp. 93-103 (11 pages)

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Currently, biofibers are used as a reinforcement in polymer composites for structural elements and construction materials instead of the synthetic fibers which cause environmental problems and are expensive. One of the chemicals with a pH close to neutral that can be potentially used as a modified fiber material is sodium chloride (NaCl). Therefore, this study aims to investigate the characteristics of a composite board made from NaCl-treated kenaf fiber. A completely randomized design method was used with consideration of two factors: the content of NaCl in the treatment solution (1 wt%, 3 wt%, and 5 wt%) and the duration of immersion of fibers in the solution (1 h, 2 h, and 3 h). The NaCl treatment was conducted by soaking the fibers in the solution for different durations. The fibers were then rinsed with water until the pH of the water reached 7 and subsequently dried inside an oven at 80℃ for 6 h. Kenaf fiber and epoxy were mixed manually with the total loading of 20 wt% based on the dry weight of the fiber. Physical and mechanical properties of the fibers were then evaluated based on JIS A 5908 particleboard standards. The results showed that increasing NaCl content in the fiber treatment solution can increase the physical and mechanical properties of the composite board. The properties of fibers treated with 5 wt% NaCl for 3 h were superior with a modulus of elasticity of 2.085 GPa, modulus of rupture of 19.77 MPa, internal bonding of 1.8 MPa, thickness swelling of 3%, and water absorption of 10.9%. The contact angle of untreated kenaf fibers was 104°, which increased to 80° and 73° on treatment with 1 wt% and 5 wt% NaCl for 3 h, respectively.

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Indoor air quality is a very important environmental factor in modern society. However, air pollutants generated from various interior construction materials significantly affect the human body, including formaldehyde (HCHO) and volatile organic compounds that threaten public health by deteriorating indoor air quality. Effective in removing these harmful substances are porous materials, such as woodceramics. In this study, charcoal, a porous material, was added to rice husk, an agricultural by-product, and sawdust generated during the sawing process to prepare boards and ceramics at different mixing ratios, and the HCHO deodorization performance and far-infrared emission characteristics were measured. As the mixing ratio of charcoal increased, the deodorization rate of the boards and ceramics tended to increase. Overall, the deodorization rate was measured to be 80% to 90%, indicating that the boards and ceramics prepared with charcoal are suitable to be used for the purpose of deodorization. The effect of the material mixing ratio on far-infrared emissivity and emission power was insignificant.

KCI등재SCOUPUS

6Phytochemical and Anti-Termite Efficiency Study of Guibourtia tessmanii (harms) J. Léonard (Kévazingo) Bark Extracts from Gabon

저자 : Ley-fleury Ella Nkogo , Christ Stone Arnaud Bopenga Bopenga , Franck Estimé Ngohang , Line Edwige Mengome , Sophie Aboughe Angone , Prosper Edou Engonga

발행기관 : 한국목재공학회 간행물 : 목재공학(Journal of the Korean Wood Science and Technology) 50권 2호 발행 연도 : 2022 페이지 : pp. 113-125 (13 pages)

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This study aimed to explore the biodiversity of chemical compounds found in the bark of Guibourtia tessmannii from Gabon, commonly called Kévazingo, and evaluate their anti-termite activity to determine their potential values as a source of development of anti-termite products that can be valued in the fields of fine chemicals and wood preservation. Extraction of G. tessmannii bark powders was carried out using the cold maceration method with trichloroethylene, acetone, ethanol, and water. Phytochemical screening made it possible to highlight groups of chemical families present in the extracts. Anti-termite activity was tested on the wild termites “Cubitermes sp” of the genus Isoptera. The yield of the extracts were 17.11% for the buttress and 13.42% for the height at 6 m. Phytochemical tests revealed that alkaloids, polyphenols, sterols, tannins, reducing compounds, flavonoids, saponins, and anthraquinones were present in the extracts. Results of anti-termite activity indicated that anti-termite activity varied with the different parts of the bark studied, extraction solvent, and concentration (50/50) and (25/75) of the extracts used. The extracts at 50/50 concentration showed a slightly better anti-termite activity compared to the 25/75 concentration. In addition, the buttress Kévazingo or buttress showed the strongest anti-termite activity for the aqueous extract with a survival rate of 0% after 2 days.

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In this study, I used wood pellets as an eco-friendly sound-absorbing material. The aim of the research was to analyze the effect of the filling height of wood pellets on sound absorption. This was done using two types of wood pellets of different lengths (A group: 1.5-3 cm, B group: less than 1.5 cm). With increasing filling height of the wood pellets, the optimum sound absorption shifted towards a lower frequency. The group B wood pellets had better sound absorption capacity than the group A ones. The optimum sound absorption coefficient of group A filled to a height of 7 cm was 0.722 at 864 Hz. On the other hand, that of group B filled to a height of 7 cm was 0.764 at 862 Hz, 5.82% higher than that of group A. While wood pellets are used as an eco-friendly fuel, the results of this study suggest the possibility of using wood pellets as an eco-friendly sound-absorbing material.

KCI등재SCOUPUS

8Development of Bamboo Zephyr Composite and the Physical and Mechanical Properties

저자 : Ihak Sumardi , Eka Mulya Alamsyah , Yoyo Suhaya , Rudi Dungani , Ignasia Maria Sulastiningsih , Syahdilla Risandra Pramestie

발행기관 : 한국목재공학회 간행물 : 목재공학(Journal of the Korean Wood Science and Technology) 50권 2호 발행 연도 : 2022 페이지 : pp. 134-147 (14 pages)

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The objective of this study is to determine the effect of fiber direction arrangement and layer composition of hybrid bamboo laminate boards on the physical and mechanical properties. The raw material used was tali bamboo (Gigantochloa apus (J.A. & J.H. Schultes) Kurs) rope in the form of flat sheets (zephyr) and falcata veneer (Paraserianthes falcataria (L) Nielsen). Zephyr bamboo was arranged in three layers using water-based isocyanate polymer (WBPI) with a glue spread rate of 300 g/㎡. There were variations in the substitution of the core layer with falcata veneers (hybrid) as much as two layers and using a glue spread rate of 170 g/㎡. The laminated bamboo board was cold-pressed at a pressure of 22.2 kgf/㎠ for 1 h, and the physical and mechanical properties were evaluated. The results showed that the arrangement of the fiber direction significantly affected the dimensional stability, modulus of rupture, modulus of elasticity, shear strength, and screw withdrawal strength. However, the composition of the layers had no significant effect on the physical and mechanical properties. The bonding quality of bamboo laminate boards with WBPI was considered to be quite good, as shown by the absence of delamination in all test samples. The bamboo hybrid laminate board can be an alternative based on the physical and mechanical properties that can meet laminated board standards.

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9Editorial Board & Organization and staffs

저자 : 한국목재공학회

발행기관 : 한국목재공학회 간행물 : 목재공학(Journal of the Korean Wood Science and Technology) 50권 2호 발행 연도 : 2022 페이지 : pp. 148-148 (1 pages)

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10Copyright

저자 : 한국목재공학회

발행기관 : 한국목재공학회 간행물 : 목재공학(Journal of the Korean Wood Science and Technology) 50권 2호 발행 연도 : 2022 페이지 : pp. 149-149 (1 pages)

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