Drvna Industrija最新文献_第5页

Additive Technologies and Their Applications in Furniture Design and Manufacturing 增材技术及其在家具设计制造中的应用

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-03-25 DOI: 10.5552/drvind.2023.0012

Lana Jarža, Anka Ozana Čavlović, S. Pervan, Nikola Španić, Miljenko Klarić, S. Prekrat

{"title":"Additive Technologies and Their Applications in Furniture Design and Manufacturing","authors":"Lana Jarža, Anka Ozana Čavlović, S. Pervan, Nikola Španić, Miljenko Klarić, S. Prekrat","doi":"10.5552/drvind.2023.0012","DOIUrl":"https://doi.org/10.5552/drvind.2023.0012","url":null,"abstract":"This paper deals with an overview of additive manufacturing and its segment - 3D printing, which is today rapidly and widely used (Agashe et al., 2020) for personal and high-capacity production. The paper discusses the possible positive factors such as small and personalized production series, cheaper design and production process, complex geometry, bionic structures (whose surfaces are complicated to make, and are copy of biological organisms) and negative factors such as lack of educated specialists and trainings. Those facts are affecting the implementation of these technologies in different segments of the design, product development and furniture production. The impacts of new technologies on the design and production of rapid prototypes and finished products in furniture industry are analyzed. The positive results of using additive manufacturing indicate that, in spite of minor obstacles and problems with connecting different production processes, additive production will have a significant place in the future of furniture design and production. The most important advantages of 3D printing is fast prototyping, one piece production, free form designing and the use of bio-based materials and their possibility of recycling.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43557565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Upotreba izoliranog monomera lignina iz crnog luga dobivenoga od praznih grozdova palmina ploda kao prebiotika 使用从空棕榈树中获得的黑空气中分离的木材单体作为益生元

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-03-25 DOI: 10.5552/drvind.2023.0015

S. Hidayati, Subeki Subeki, M. M. Harahap, S. Hadi

{"title":"Upotreba izoliranog monomera lignina iz crnog luga dobivenoga od praznih grozdova palmina ploda kao prebiotika","authors":"S. Hidayati, Subeki Subeki, M. M. Harahap, S. Hadi","doi":"10.5552/drvind.2023.0015","DOIUrl":"https://doi.org/10.5552/drvind.2023.0015","url":null,"abstract":"Waste is generated in the form of black liquor during pulp processing. Furthermore, lignin, the main ingredient of black liquor, contains a phenylpropanoid compound with prebiotic and antimicrobial activity. Also, it is a component of lignocellulose that has prebiotic and antimicrobial activity effects due to its indigestible nature and it comprises phenylpropanoid components. Therefore, this study examines and identifies the lignin purification and test results of its prebiotic activity. The technique used to identify lignin fraction is called Thin Layer Chromatography (TLC) and Gas Chromatography-Mass Spectrometry (GC-MS) plates. Prebiotic activity tests were performed using the calculation of total bacteria on the growth of Lactobacillus casei. The results showed that the purification process using CHCl3, 3 % MeOH:CHCl3, 20 % MeOH:CHCl3, and MeOH yielded 10.68 %, 6.34 %, 11.38 % 44.85 %, respectively. The 3 % MeOH:CHCl3 fraction contained benzaldehyde, 4- hydroxy-3,5- dimethoxy, 1-methylbutyl hexadecanoate, oleic acid, and di-2-ethylhexyl phthalate. The 3 % MeOH:CHCl3 fractionate with a concentration of 15 % also showed a prebiotic activity for L. casei at 6.1 x 102 colonies/mL.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47506734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Iskorištavanje borovine (Pinus sylvestris L.) s greškama za proizvodnju kompozitnog drva 利用樟子松

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-03-25 DOI: 10.5552/drvind.2023.0048

Daniel Koynov, Miglena Valyova, Emiliyan Parzhov, Lee Seng Hua

引用次数: 3

Effects of Medium Density Fiberboards (MDF) Recycling Methods on Fiber Dimensions and Some Reconstructed Board Properties 中密度纤维板(MDF)回收方法对纤维尺寸和某些改造板性能的影响

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-03-25 DOI: 10.5552/drvind.2023.0037

Çağrı Olgun, S. Ates, Emre Uzer

引用次数: 1

Shear Force Capacities of H-Type Furniture Joints Constructed of Various Heat-Treated Wood Species 不同热处理木材H型家具节点的抗剪性能

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-03-25 DOI: 10.5552/drvind.2023.0010

M. Acar, E. Balikci, T. Kuşkun, Ali Kasal, Y. Z. Erdil

{"title":"Shear Force Capacities of H-Type Furniture Joints Constructed of Various Heat-Treated Wood Species","authors":"M. Acar, E. Balikci, T. Kuşkun, Ali Kasal, Y. Z. Erdil","doi":"10.5552/drvind.2023.0010","DOIUrl":"https://doi.org/10.5552/drvind.2023.0010","url":null,"abstract":"The aim of this study was to investigate the effect of wood species, heat treatment, adhesive type and joint technique on shear force capacity of H-type furniture joints. For this purpose, an experimental design that consisted of 3 wood species, 2 treatment processes (untreated, heat-treated), 2 adhesive types (polyurethane (PUR), polyvinyl acetate (PVAc)) and 2 joint techniques (dowel, mortise-tenon (MT)) and 5 replications for each group were prepared, and accordingly, a total of 120 specimens were tested under static shear loads. Siberian pine (Pinus sibirica), Iroko (Chlorophora excelsa), and common ash (Fraxinus excelsior), which are commonly used in furniture constructions, were used as wood species. In general, iroko showed the highest shear force capacity between the wood species. The specimens constructed of heat-treated wood species showed lower shear force capacity by approximately 15 % in comparison to the same untreated specimens. MT joints showed better performance than dowel joints higher by approximately 21 %. PVAc adhesive gave higher values than PU adhesive by around 5 %. According to the results of four-way interactions, highest shear force capacities of H-type joints were obtained from “Common ash-PVAc-MT” combination in groups of untreated specimens and from “Iroko-PU-MT” combination in groups of heat-treated specimens.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42155760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prediction of Optimum Expanded Polystyrene Densities for Best Thermal Insulation Performances of Polystyrene Composite Particleboards by Using Artificial Neural Network 用人工神经网络预测聚苯乙烯复合刨花板最佳隔热性能的最佳发泡密度

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2022-11-17 DOI: 10.5552/drvind.2022.2119

H. Ozturk, Aydin Demir, Cenk Demirkir

{"title":"Prediction of Optimum Expanded Polystyrene Densities for Best Thermal Insulation Performances of Polystyrene Composite Particleboards by Using Artificial Neural Network","authors":"H. Ozturk, Aydin Demir, Cenk Demirkir","doi":"10.5552/drvind.2022.2119","DOIUrl":"https://doi.org/10.5552/drvind.2022.2119","url":null,"abstract":"The objective of this study is to predict the optimum expanded polystyrene (EPS) densities for the best insulation properties of the particleboards manufactured with waste EPS instead of formaldehyde-based adhesives used in particleboard production with artificial neural network (ANN). For this purpose, the waste EPS particles of five different densities were used in the production of composite particleboards. The experimental dana used in the study were obtained from the previous study. Half of the beech, poplar, alder, pine and spruce chips were dried in a drying oven and the other half were naturally conditioned at room temperature, and then 18 mm thick three-layer composite particleboards were produced. The thermal conductivity of panels was determined according to ASTM C 518. The prediction model with the best performance and acceptable deviations was determined by using statistical and graphical comparisons between the experimental data and the prediction values obtained as a result of ANN analysis. Then, using this prediction model, the thermal conductivity coefficient values were estimated for the intermediate EPS densities that were not experimentally tested. According to the analysis findings, the thermal insulation performance for both beech and spruce polystyrene composite particleboards (PCP) panels increased with using of waste EPS foams with a density of 30 kg/m3. The lowest thermal conductivity values were obtained from the EPS waste foams with the density of 18, 13 and 22 kg/m3 for the PCP panels produced with poplar, alder and pine in the natural drying, respectively. In the technical drying, these values were found to be 15, 14 and 11-13 kg/m3, respectively. Technical drying showed much better thermal performance than natural drying while poplar indicated the best performance among the wood species.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42273546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Safety Stresses of Red Pine Wood According to Site Index Grade 按场地指标等级划分红松木材的安全应力

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2022-11-17 DOI: 10.5552/drvind.2022.2115

I. Bektas

{"title":"Safety Stresses of Red Pine Wood According to Site Index Grade","authors":"I. Bektas","doi":"10.5552/drvind.2022.2115","DOIUrl":"https://doi.org/10.5552/drvind.2022.2115","url":null,"abstract":"One of the most important indicators for using wooden materials as a building material is safety stress (SS). Site index is also an essential criterion for construction materials. This research was planned with the aim to reveal the relationship between safety stress and site index classes (I, II, III) of red pine wood, which is an important tree species of Turkey and the Mediterranean basin. Also, the safety coefficient was calculated. The safety stress tests for compression, bending, and tensile, tensile perpendicular to fibers, cleavage, and shearing strengths were calculated as 9.2, 9.7, 8.9, 0.35, 0.10, and 1.4 N/mm2, respectively. The statistical analyses indicated that the site index difference had a significant effect on the safety stress in red pine wood as mentioned above. Again, the safety coefficient was calculated as 5.27 for red pine wood. In addition, it was determined that the safety stress values of red pine wood provided the desired lower limit values according to the standard (TS 647 and EN 1995-1-1), excluding class I. As a result of the regression and correlation analyses, the presence of a moderately increasing linear relationship (R2 values equal to 0.41-0.68) was found between the density and safety stress values for all site indexes.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48833967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fracture Behavior of Wood Under Mode I Loading in Tangential Direction 木材在切向I型载荷作用下的断裂行为

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2022-11-15 DOI: 10.5552/drvind.2022.2135

Arif Caglar Konukcu

{"title":"Fracture Behavior of Wood Under Mode I Loading in Tangential Direction","authors":"Arif Caglar Konukcu","doi":"10.5552/drvind.2022.2135","DOIUrl":"https://doi.org/10.5552/drvind.2022.2135","url":null,"abstract":"The aim of this study was to determine the fracture behavior of southern yellow pine (Pinus taeda L.) and red oak (Quercus falcata) wood under mode I loading in the tangential-radial and tangential-longitudinal crack propagation systems by a compact tension test method. The results of the study indicated that, in general, red oak had a significantly different fracture behavior than southern yellow pine for each of the two crack propagation systems. The fracture toughness was higher in the tangential-radial crack propagation system than that in the tangential-longitudinal crack system, but there was no significant difference between the two crack propagation systems for southern yellow pine. The specific fracture energy of the tangential-longitudinal crack propagation system for both wood species was significantly lower than that of the tangential-radial crack propagation system. It means that more energy per unit area for the tangential-radial crack propagation system was needed to separate a wood sample into two halves. The difference in the fracture behavior of wood by the crack propagation system can be explained by the structural features of the tested samples since the crack propagation of the tangentialradial system crosses the annual ring and wood fibers can bridge the crack surface.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47851249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of Exposure Time and Temperature on Screw Driving Torques in Heat-Treated Anatolian Black Pine and Sessile Oak Wood 曝光时间和温度对热处理安纳托利亚黑松和无柄栎木螺杆驱动力矩的影响

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2022-11-15 DOI: 10.5552/drvind.2022.2114

M. Karamanoğlu, Önder Tor

引用次数: 0

Characterization and Separation of Lignin from Kraft Black Liquor with Different Alcohols 不同醇类硫酸盐黑液中木质素的表征与分离

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2022-11-15 DOI: 10.5552/drvind.2022.2127

A. Gençer, M. Akyüz, F. Yurdakurban, D. Aydemir

{"title":"Characterization and Separation of Lignin from Kraft Black Liquor with Different Alcohols","authors":"A. Gençer, M. Akyüz, F. Yurdakurban, D. Aydemir","doi":"10.5552/drvind.2022.2127","DOIUrl":"https://doi.org/10.5552/drvind.2022.2127","url":null,"abstract":"The aim of this study was to investigate the properties of lignin obtained from black liquors of Scots pine (Pinus sylvestris L.) and European aspen (Populus tremula L.) woods cooked by Kraft method. In the study, the cooking process was carried out according to parameters such as: 1/4 of wood/liquor ratio, cooking temperature at (170±2) °C, and cooking time of 90 min. After the cooking process, the black liquor was taken to a beaker from the digester, and lignin was recovered in different ways from the black liquor with methyl alcohol (MeOH) and ethyl alcohol (EtOH). The material properties of the recovered lignin were analyzed by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), x-ray diffraction (XRD), and thermogravimetric analysis (TGA). Commercial lignin (cml-lignin) was used to compare the properties of lignin obtained from black liquor. SEM images showed that the particle sizes of lignin obtained with EtOH and MeOH were similar. In FT-IR, it was detected that the recovered lignin types have similar functional groups, while some differences were observed in intensities of the peaks. XRD results revealed that all lignin types were found to have a similar structure with the cml-lignin, and that alcohol types used during the recovery process of lignin do not have an important effect on the structural properties of lignin. The TGA results indicated that the thermal stability of recovered lignin has better thermal stability than cml-lignin. The results showed that the recovered lignin was similar to commercial lignin and that it can be recovered from the liquor leftover from Kraft pulping by the method described and used in industry.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49460771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0