Wood Research最新文献

EFFECT OF TEMPERATURE AND RELATIVE HUMIDITY VARIATIONS ON BENDING STRENGTH PROPERTIES OF HYBRID EUCALYPTUS WOOD IN GHANA 温度和相对湿度变化对加纳杂交桉树木材弯曲强度特性的影响

IF 1.3 4区农林科学

Wood Research Pub Date : 2023-12-21 DOI: 10.37763/wr.1336-4561/68.4.781791

H. Seidu, Róbert Németh, F. Owusu, P. Mensah, Michael Awotwe-Mensah, Boakye Felix

引用次数: 0

COLOR DIVERSITY OF BEECH WOOD WITH A FALSE HEARTWOOD IN THE COLOR SPACE CIE L*a*b* 榉木与假心木在色彩空间 CIE L*a*b* 中的色彩多样性

IF 1.3 4区农林科学

Wood Research Pub Date : 2023-12-21 DOI: 10.37763/wr.1336-4561/68.4.792801

L. Dzurenda, Michal Dudiak

{"title":"COLOR DIVERSITY OF BEECH WOOD WITH A FALSE HEARTWOOD IN THE COLOR SPACE CIE L*a*b*","authors":"L. Dzurenda, Michal Dudiak","doi":"10.37763/wr.1336-4561/68.4.792801","DOIUrl":"https://doi.org/10.37763/wr.1336-4561/68.4.792801","url":null,"abstract":"The color of the false heartwood of Fagus sylvatica L. perceived by the human eye is in a wide range of shades from light brown-yellow to red-brown. The article analyzes the color in the color space CIE L*a*b* of dry wood of the false heartwood type: round, flame, star and marble. The color of the wood was measured with a colorimeter Color reader CR-10. The most colorful is the wood marble with a false heartwood. The results of statistical processing of the measured color values of dry beech wood, marble false heartwood on a planed surface identify it with values on the lightness coordinate L* = 65.2 ± 6.9 and on the chromatic coordinates: red color a* = 13.2 ± 2.3 and yellow b* = 19.2 ± 1.9. The most homogeneous in color is the color of the ring wood of the false heartwood with the coordinate values: L* = 63.7 ± 3.1; a* = 12.6 ± 1.7 and b* = 20.1 ± 1.6. The color diversity of the darkness and yellow-brown-red shades of the wood of the false heartwood is numerically quantified by the values of the total color difference ΔEsx* = 3.9 - 7.5. The presented values of the color of false heartwood beech complement the knowledge about the color of false heartwood and by defining the boundaries of color in the color space CIE L*a*b*, they create space for designers to model the color diversity of compositions and construction-joinery products made of sapwood and false heartwood beech.","PeriodicalId":23786,"journal":{"name":"Wood Research","volume":"14 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138948276","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

EFFECT OF MATERIAL, ADHESIVE AND LOADING ON THE STIFFNESS OF WOODEN DOWEL JOINTS 材料、粘合剂和荷载对木榫连接刚度的影响

IF 1.3 4区农林科学

Wood Research Pub Date : 2023-12-21 DOI: 10.37763/wr.1336-4561/68.4.768780

Abdurrahman Karaman, Mehmet NURİ YILDIRIM

引用次数: 0

EFFECT OF ANATOMICAL STRUCTURE ON DIMENSIONAL STABILITY OF LOW MOLECULAR WEIGHT PHENOL-FORMALDEHYDE IMPREGNATED WOOD 解剖结构对低分子量酚醛浸渍木材尺寸稳定性的影响

IF 1.3 4区农林科学

Wood Research Pub Date : 2023-06-28 DOI: 10.37763/wr.1336-4561/68.3.425443

S. Augustina, W. Dwianto, Muhammad Adly Rahandi Lubis, R. Damayanti, Danang SUDARWOKO ADI, J. Malik, I. Wahyudi, W. Darmawan, P. Gérardin, S. D. Marbun, H. Isoda

{"title":"EFFECT OF ANATOMICAL STRUCTURE ON DIMENSIONAL STABILITY OF LOW MOLECULAR WEIGHT PHENOL-FORMALDEHYDE IMPREGNATED WOOD","authors":"S. Augustina, W. Dwianto, Muhammad Adly Rahandi Lubis, R. Damayanti, Danang SUDARWOKO ADI, J. Malik, I. Wahyudi, W. Darmawan, P. Gérardin, S. D. Marbun, H. Isoda","doi":"10.37763/wr.1336-4561/68.3.425443","DOIUrl":"https://doi.org/10.37763/wr.1336-4561/68.3.425443","url":null,"abstract":"This research deals with low molecular weight-phenol formaldehyde (LMW–PF) impregnation on sepetir (Sindora spp), nyatoh (Palaquium spp.), and pisang putih (Mezzettia spp.) woods to determine the effect of different anatomical structure on weight percent gain and dimensional stability improvement. The wood samples were impregnated using LMW–PF solutions with 7, 8, 9, 10, and 11% of concentrations (w/w), vacuum-pressured (–98 kPa, 15 min, 350 kPa, 4 h), and re-immersed in 80°C for 3 h. According to the findings, LMW–PF impregnation reduced coefficient of swelling by 9.64–29.95%, and increased anti-swelling efficiency by 12.24–29.91%. Additionally, the water absorption and thickness swelling reduced by 2.43–38.75% and 15.94–34.21%, respectively, indicating the improvement of dimensional stability. Microscopy and NIR analysis revealed the presence and reaction of LMW–PF within porous wood matrix. The effect of diverse anatomical structures caused complexity on LMW–PF impregnation. Sepetir-treated wood with fewer anatomical barriers resulted in better dimensional stability improvement than others.","PeriodicalId":23786,"journal":{"name":"Wood Research","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48415317","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: 1

EFFECTS OF PRESSING TEMPERATURE AND COMPRESSION RATIO ON DENSITY DISTRIBUTION AND HARDNESS OF SURFACE DENSIFIED POPLAR WOOD 压制温度和压缩比对表面致密杨木密度分布和硬度的影响

IF 1.3 4区农林科学

Wood Research Pub Date : 2023-06-28 DOI: 10.37763/wr.1336-4561/68.3.465476

Qiaofang Zhou, Dongdong Liang, Aokai Cheng, Xianju Wang, Dengyun Tu

{"title":"EFFECTS OF PRESSING TEMPERATURE AND COMPRESSION RATIO ON DENSITY DISTRIBUTION AND HARDNESS OF SURFACE DENSIFIED POPLAR WOOD","authors":"Qiaofang Zhou, Dongdong Liang, Aokai Cheng, Xianju Wang, Dengyun Tu","doi":"10.37763/wr.1336-4561/68.3.465476","DOIUrl":"https://doi.org/10.37763/wr.1336-4561/68.3.465476","url":null,"abstract":"Process parameters play an important role in wood surface densification. In this study, the poplar (Populus tomentosa Carr.) wood was heated on one side at 100℃, 150℃ and 180℃, and compressed in the radial direction with the speed of 10 mm/min. The initial thickness of the wood samples were 30 mm, 26 mm and 23 mm, and they were all compressed to 20 mm and resulting in three different compression ratios: 33.3%, 23.1% and 13.0%. When the surface densification completed, the density distribution and hardness of the densified and un-treated samples were measured and analyzed. Results show that the compressing temperature mainly decided the formation of the density distribution curve and the peak density increased with the increasing temperature; as the compression ratio increased, the peak density increased and the thickness of the densified zone broadened; the surface hardness was highly correlated with the density distribution which was affected by temperature and compression ratio, and as the peak density increased and the thickness of the densified broadened the hardness increased accordingly. Therefore, by optimizing the process parameters such as the compressing temperature and compression ratio could generate a targeted density distribution which has the desired hardness.","PeriodicalId":23786,"journal":{"name":"Wood Research","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45799899","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

DETERMINATION OF UREA-FORMALDEHYDE RESIN CONTENT IN POPLAR FIBER BASED ON HYPERSPECTRAL TECHNIQUES 基于高光谱技术测定杨树纤维中脲醛树脂含量

IF 1.3 4区农林科学

Wood Research Pub Date : 2023-06-28 DOI: 10.37763/wr.1336-4561/68.3.488501

Chunmei Yang, Zanbin Zhu, Tongbin Liu, Bo Xue, Wen Qu, Tingting Wang

{"title":"DETERMINATION OF UREA-FORMALDEHYDE RESIN CONTENT IN POPLAR FIBER BASED ON HYPERSPECTRAL TECHNIQUES","authors":"Chunmei Yang, Zanbin Zhu, Tongbin Liu, Bo Xue, Wen Qu, Tingting Wang","doi":"10.37763/wr.1336-4561/68.3.488501","DOIUrl":"https://doi.org/10.37763/wr.1336-4561/68.3.488501","url":null,"abstract":"In this experiment, poplar fibers containing 0%, 2%, 4%, 6%, 8%, 10%, 12%, 14%, 16%, 18%, 20%, 25% and 30% of urea-formaldehyde resin were prepared. A model for the detection of urea-formaldehyde resin content in poplar fibers was established by the hyperspectral near-infrared imaging system combined with relevant algorithms. The spectral images of poplar fibers containing different contents of urea-formaldehyde (UF) resin were measured separately using hyperspectral imager. The results of four preprocessing methods, namely mean centering (MC), multiple scattering correction (MSC), standard normal variables (SNV) and first-order derivative (1-Der) were analyzed, and the optimal preprocessing method was selected as SNV. The band combinations with the highest correlation with the urea-formaldehyde resin content were compared and analyzed with the full-band model to establish the partial least squares regression (PLSR) model. The experimental results show that the hyperspectral imaging system combined with the corresponding algorithm can achieve rapid detection of UF resin content in poplar fibers, and the results of this study provide technical support and theoretical reference for determination of resin content in ultra-thin fiberboard production. The method is an innovative model for the determination of UF resin in wood fibers.","PeriodicalId":23786,"journal":{"name":"Wood Research","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47983739","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

OPTIMISATION OF ENERGY CONSUMPTION IN PAPER PRODUCTION. REVIEW 优化纸张生产中的能源消耗。审查

IF 1.3 4区农林科学

Wood Research Pub Date : 2023-06-28 DOI: 10.37763/wr.1336-4561/68.3.600618

Š. Boháček, A. Pažitný, Stela Slámová

引用次数: 0

RELATIONSHIP BETWEEN WOOD ANATOMICAL FEATURES AND SURFACE ROUGHNESS CHARACTERISTICS 木材解剖特征与表面粗糙度特征的关系

IF 1.3 4区农林科学

Wood Research Pub Date : 2023-06-28 DOI: 10.37763/wr.1336-4561/68.3.455464

C. Kang, Kazuharu Hashitsume, E. Jang, H. Kolya

引用次数: 0

EFFECT OF WATER ABSORPTION ON THE MECHANICAL PROPERTIES OF SILANE-TREATED WOOD FLOUR POLYPROPYLENE COMPOSITES 吸水性对硅烷处理木粉-聚丙烯复合材料力学性能的影响

IF 1.3 4区农林科学

Wood Research Pub Date : 2023-06-28 DOI: 10.37763/wr.1336-4561/68.3.477487

D. Kiryakova, Antoniya Ilieva, Neli Simeonova

引用次数: 0

POSSIBILITY OF USING CRUDE AND EXPANDED VERMICULITE IN CEMENT-BONDED PARTICLEBOARD PRODUCTION 粗蛭石和膨胀蛭石用于水泥胶结刨花板生产的可能性

IF 1.3 4区农林科学

Wood Research Pub Date : 2023-06-28 DOI: 10.37763/wr.1336-4561/68.3.572581

U. Aras

{"title":"POSSIBILITY OF USING CRUDE AND EXPANDED VERMICULITE IN CEMENT-BONDED PARTICLEBOARD PRODUCTION","authors":"U. Aras","doi":"10.37763/wr.1336-4561/68.3.572581","DOIUrl":"https://doi.org/10.37763/wr.1336-4561/68.3.572581","url":null,"abstract":"The aim of this study is to investigate the effect of using vermiculite on the thermal, physical and mechanical properties of cement-bonded particleboards. For this purpose, single-layer cementitious particle boards with a final density of 1200 kg/m3 and a size of 550 x 550 x 10 mm were produced using 2 type vermiculites (crude and expanded) at three different ratios (5%, 10% and 15%). The produced boards were examined in terms of thermal (TGA/DTG), physical (moisture content, density, water absorption and thickness swelling), mechanical (modulus of rupture, modulus of elasticity, internal bond strength and screw withdrawal resistance) properties. According to the TGA results, using both types of vermiculite caused an increase in cement hydration products in the boards and increased the thermal resistance. While the use of vermiculite did not significant effect on the density and moisture content of the boards, it increased the dimensional stability of the boards. The values of modulus of rupture and modulus of elasticity increased when the low amount of vermiculite was added. However, with the use of vermiculite in the boards, there was a decrease in the internal bond strength and screw withdrawal resistance values in general. All boards produced using vermiculite met the values specified in EN standards.","PeriodicalId":23786,"journal":{"name":"Wood Research","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46573902","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