Drvna Industrija最新文献_第10页

Decay Resistance and Color Change of Pine and Beech Wood Impregnated with R. Luteum and R. Ponticum Plant Extracts 木犀草和蓬蓬草浸渍松木和山毛榉木的抗腐性和颜色变化

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2021-11-24 DOI: 10.5552/drvind.2021.2043

Hüseyin Pelit, A. Alkan, M. Yalçın

{"title":"Decay Resistance and Color Change of Pine and Beech Wood Impregnated with R. Luteum and R. Ponticum Plant Extracts","authors":"Hüseyin Pelit, A. Alkan, M. Yalçın","doi":"10.5552/drvind.2021.2043","DOIUrl":"https://doi.org/10.5552/drvind.2021.2043","url":null,"abstract":"In this study, the effect of impregnation with natural extracts on decay resistance and color change of pine and beech wood was analyzed. Flowers of Rhododendron luteum and Rhododendron ponticum plants were extracted according to the decoction method and aqueous solutions were prepared at different concentration levels (2 %, 4 % and 7 %). In addition, ferrous sulfate, copper sulfate and aluminum sulfate mordants were added to the solution to improve the properties of the extracts. Then the wood specimens were impregnated with the prepared solutions. The results indicated that the effect of plant species on the mass loss of specimens exposed to T. versicolor (white-rot fungus) was insignificant. Non-mordant extracts had a slight effect on the mass loss of the specimens. However, in pine and beech specimens impregnated with mordant-added (especially ferrous sulfate-added) extracts, mass loss was significantly reduced and resistance to fungal rot was almost completely achieved. The concentration level did not have a significant effect on the mass loss of specimens treated with mordant-added extracts. After impregnation, the L* value of all specimens (especially those treated with ferrous sulfate-added extracts) decreased and the specimens darkened. The a* and b* values increased in specimens treated with non-mordant and aluminum sulfate-added extracts and these specimens tend to have a red-yellow color. The a* value decreased and the b* value increased in wood specimens treated with copper sulfate-added extracts. The green-yellow color trend of these specimens increased. Both the a* and b* values of the specimens treated with ferrous sulfate-added extracts decreased and the green-blue color tendency increased in these specimens. The increase in the concentration level positively affected the determined color changes. The total color change (ΔE*) was higher in wood specimens (especially pine) treated with ferrous sulfate-added R. ponticum extracts.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43600263","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: 2

Biodegradation and Micro- Scale Treatability Pattern of Loblolly Pine Heartwood Bioincised by Bacillus Subtilis and Physisporinus Vitreus 枯草芽孢杆菌和毛孢菌对火炬松心材的生物降解及微尺度处理模式

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2021-11-24 DOI: 10.5552/drvind.2021.2034

Ismaeil Zahedi Tajrishi, A. Tarmian, R. Oladi, M. Humar, M. Ahmadzadeh

{"title":"Biodegradation and Micro- Scale Treatability Pattern of Loblolly Pine Heartwood Bioincised by Bacillus Subtilis and Physisporinus Vitreus","authors":"Ismaeil Zahedi Tajrishi, A. Tarmian, R. Oladi, M. Humar, M. Ahmadzadeh","doi":"10.5552/drvind.2021.2034","DOIUrl":"https://doi.org/10.5552/drvind.2021.2034","url":null,"abstract":"One strategy for improving the treatability of refractory wood species is biological incising, and\u0000its efficiency depends on how the microorganisms modify the porous structure of the wood. Evaluation of the bioincised wood treatability on a micro-scale can thus help to better understand the treatability enhancing mechanisms. In the present study, the biodegradation pattern and micro-scale treatability of Loblolly pine (Pinus taeda L.) heartwood were determined after bioincising with the white-rot fungus Physisporinus vitreus (Pers.: Fr.) P. Karsten isolate 136 and bacterium Bacillus subtilis UTB22. Oven-dried specimens with dimensions of 50 mm × 25 mm × 15 mm (L × T × R) were incubated with the microorganisms at (23±2) °C and (65±5) % relative humidity for six weeks. The control and exposed wood blocks were then pressure treated by 1 % fluorescent dye (fluorescein)-containing water to study the treatability pattern under a fluorescence microscope. The longitudinal and tangential air permeability and compression strength parallel to the grain of the specimens were also determined at the end of the incubation period. Scanning electron microscopic (SEM) studies showed that degradation by B. subtilis UTB22 was limited to the pit membranes, but the cell walls were also degraded to some extent by P. vitreus. The fungus caused a higher mass loss compared to the bacterium, whereas the permeability enhancing ability of the bacterium was more pronounced. The fluorescent dye tracer also showed that higher treatability with more uniformity was obtained by B. subtilis UTB22. The improvement in treatability by both microorganisms was mainly due to the degradation of the earlywood tracheids.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45153520","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: 2

Finite Element Analysis of Dynamic Characteristics and Bending Stiffness for Cross Laminated Timber Floor Panels with and without Openings 有开孔和无开孔交叉层压木地板动力特性和弯曲刚度的有限元分析

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2021-11-24 DOI: 10.5552/drvind.2021.2037

L. Kozarić, S. Bursać, M. Vojnić Purčar, M. Bešević, Ž. Tekić

引用次数: 0

Effect of Artificial Ageing on Adhesive Bonds from Heat Treated Spruce 人工老化对热处理云杉胶接性能的影响

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2021-11-24 DOI: 10.5552/drvind.2021.2044

M. Kariž, Manja Kitek Kuzman, M. Šernek

引用次数: 1

Performance of ANN in Predicting Internal Bonding of Cement Particleboard Manufactured from Giant Reed and Bagasse 人工神经网络在预测巨型芦苇和蔗渣水泥刨花板内部粘结中的性能

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2021-07-22 DOI: 10.5552/drvind.2021.2018

M. Nazerian, Hossin Assadolahpoor Nanaii, E. Vatankhah, M. Koosha

{"title":"Performance of ANN in Predicting Internal Bonding of Cement Particleboard Manufactured from Giant Reed and Bagasse","authors":"M. Nazerian, Hossin Assadolahpoor Nanaii, E. Vatankhah, M. Koosha","doi":"10.5552/drvind.2021.2018","DOIUrl":"https://doi.org/10.5552/drvind.2021.2018","url":null,"abstract":"The present article investigates the microstructure of the cement matrices and the products of cement hydration by means of scanning electron microscopy, Fourier transform infrared spectroscopy and X-Ray diffraction. Then, the internal bonding strength (IB) is measured for the mixtures containing various amounts of nanosilica (NS), reed and bagasse particles. Finally, an Artificial Neural Network (ANN) is trained to reproduce these experimental results. The results show that the hardened cement paste including NS features the highest level of C-S-H. However, it has a lower level of C-S-H polymerization if reed or bagasse particles are applied. A relatively new dense microstructural degree is considered in the cement pastes containing NS, and a lower agglomeration is observed in the samples including reed or bagasse particles with NS. According to the microstructural analysis, the addition of NS to the samples containing reed or bagasse particles increases the unhydrated amount of C2S and C3S in the cement paste due to the decrease in the water needed for fully hydrated cement grains through portlandite (Ca(OH)2), C-S-H and ettringite increase. Besides, it is shown that the ANN prediction model is a useful, reliable and quite effective tool for modeling IB of cement-bonded particleboard (CBPB). It is indicated that the mean absolute percentage errors (MAPE) are 1.98 % and 1.45 % in the prediction of the IB values for the training and testing datasets, respectively. The determination coeffi cients (R2) of the training and testing data sets are 0.972 and 0.997 in the prediction of the bonding strength by ANN, respectively.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44005712","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

Heat-Treated Wood Reinforced High Density Polyethylene Composites 热处理木材增强高密度聚乙烯复合材料

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2021-07-22 DOI: 10.5552/drvind.2021.1971

K. Karakuş, D. Aydemir, G. Gunduz, F. Mengeloglu

{"title":"Heat-Treated Wood Reinforced High Density Polyethylene Composites","authors":"K. Karakuş, D. Aydemir, G. Gunduz, F. Mengeloglu","doi":"10.5552/drvind.2021.1971","DOIUrl":"https://doi.org/10.5552/drvind.2021.1971","url":null,"abstract":"This study investigated the effect of untreated and heat-treated ash and black pine wood flour concentrations on the selected properties of high density polyethylene (HDPE) composites. HDPE and wood flour were used as thermoplastic matrix and filler, respectively. The blends of HDPE and wood fl our were compounded using single screw extruder and test samples were prepared through injection molding. Mechanical properties like tensile strength (TS), tensile modulus (TM), elongation at break (EatB), fl exural strength (FS), fl exural modulus (FM) and impact strength (IS) of manufactured composites were determined. Wood fl our concentrations have significantly increased density, FS, TM and FM and hardness of composites while reducing TS, EatB and IS. Heat-treated ash and black pine fl our reinforced HDPE composites had higher mechanical properties than untreated ones. Composites showed two main decomposition peaks; one coming from ash wood flour (353-370 °C) and black pine wood fl our (373-376 °C), the second one from HDPE degradation (469-490 °C). SEM images showed improved dispersion of heat-treated ash and black pine wood flour. The obtained results showed that both the untreated and heat-treated ash/black pine wood flour have an important potential in the manufacture of HDPE composites.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48296762","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 Using Urea Formaldehyde Modified with Extracts in Plywood on Formaldehyde Emission 脲醛提取物改性胶合板对甲醛释放量的影响

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2021-07-22 DOI: 10.5552/drvind.2021.2005

Uğur Bilgin, G. Colakoglu

{"title":"Effect of Using Urea Formaldehyde Modified with Extracts in Plywood on Formaldehyde Emission","authors":"Uğur Bilgin, G. Colakoglu","doi":"10.5552/drvind.2021.2005","DOIUrl":"https://doi.org/10.5552/drvind.2021.2005","url":null,"abstract":"Formaldehyde-based adhesives are used in the forestry industry. This is because formaldehyde is inexpensive, easy to use and resistant to moisture; it also has particular mechanical effects. Formaldehyde has both advantages and disadvantages. It is known that various diseases such as lung cancer occur in humans as a result of the release of formaldehyde into the air during and after board production. In this study, a urea formaldehyde glue mixture was prepared by using four different fillers (extract of maritime pine (Pinus pinaster) and elm (Ulmus glabra) bark, extract of hazelnut (Corylus avellana) husk and acorn tannins) at two different ratios. The bonding shear strength of pine (Pinus sylvestris) and spruce (Picea orientalis) plywood produced with urea formaldehyde adhesive was tested according to EN 314-1 standard. All plywood, except the plywood with acorn tannin, met the requirements of the standard. A formaldehyde emission test of the plywood was carried out in accordance with EN 713-3 standard. With this approach, it is possible to quickly determine formaldehyde emissions. Experimental results were obtained for subsequent measurements, including chamber tests. It was observed that the elm bark extract reduced the formaldehyde emission of pine plywood by 40 %, while other fillers reduced it by 3-37 %.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46574071","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

Potencijal i uloga biomase u hrvatskoj i europskoj energetskoj tranziciji 生物量在克罗地亚和欧洲能源转型中的潜力和作用

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2021-07-22 DOI: 10.5552/drvind.2021.2023

Helena Biljuš, M. Sertić

{"title":"Potencijal i uloga biomase u hrvatskoj i europskoj energetskoj tranziciji","authors":"Helena Biljuš, M. Sertić","doi":"10.5552/drvind.2021.2023","DOIUrl":"https://doi.org/10.5552/drvind.2021.2023","url":null,"abstract":"Republika Hrvatska kao punopravna članica Europske unije trenutačno sudjeluje u energetskoj tranziciji, odnosno u procesu dekarbonizacije gospodarstva transformacijom energetskog sektora u kojemu obnovljivi izvori energije zamjenjuju fosilna goriva. U tom procesu biomasa kao najsloženiji oblik obnovljive energije ima važnu ulogu s obzirom na brojne pozitivne okolišne i ekonomsko-socijalne aspekte uporabe. Sukladno ciljevima EU-a, Hrvatska je ostvarila potrebnih 20 % udjela proizvodnje iz obnovljivih izvora, no udio proizvodnje energije iz biomase još nije zadovoljavajući. Najiskorištavaniji izvor biomase jest kruta biomasa, posebice peleti, proizvođači kojih su izvozno orijentirani. Unatoč tome, Hrvatska još uvijek ovisi o uvozu biomase, kao i sve članice EU-a. Stoga je za unapređenje proizvodnje i potrošnje energije od biomase potrebna sinergija i zajedničko djelovanje svih sudionika energetskog sektora, a donositelji odluka odgovarajućim mjerama trebaju stvoriti preduvjete za razvoj tržišta biomase. U ovom se radu na temelju analize tržišta biomase te njezine uloge u nacionalnim i europskim energetskim politikama analizira trenutačni položaj i značenje biomase u energetskoj tranziciji Hrvatske. Na temelju provedenog istraživanja može se zaključiti da je jasno vidljiv pomak prema niskougljičnoj energetici, u čemu upravo biomasa ima važnu ulogu, iako je stopa upotrebe biomase u Hrvatskoj još uvijek ispod ambicioznog scenarija koji predviđa EU.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44586410","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: 4

Thermal Behavior of Insulation Fiberboards Made from MDF and Paper Wastes 由中密度纤维板和废纸制成的绝缘纤维板的热性能

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2021-07-22 DOI: 10.5552/drvind.2021.2019

B. Moezzipour, Aida Moezzipour

{"title":"Thermal Behavior of Insulation Fiberboards Made from MDF and Paper Wastes","authors":"B. Moezzipour, Aida Moezzipour","doi":"10.5552/drvind.2021.2019","DOIUrl":"https://doi.org/10.5552/drvind.2021.2019","url":null,"abstract":"Today, recycling is becoming increasingly important. In recycling process, the product performance should also be considered. In this study, manufacturing insulation fiberboard, as a practical wood product from recycled fibers, was investigated. For this purpose, two types of waste (MDF wastes and waste paper) were recycled to fibers and used for producing insulation fiberboards. The target fiberboard density was 0.3 g/cm3. The ratio of waste paper to MDF waste recycled fibers (WP/RF) was considered at two levels of 70/30 and 50/50. Polyvinyl acetate adhesive was used as a variable in the board manufacturing process. The mechanical properties, dimensional stability, thermal conductivity, and fire resistance of the boards were evaluated. Besides, the thermal stability of fiberboards was studied using thermal analysis including thermogravimetric analysis (TGA) and differential thermal analysis (DTA). The results showed that the insulation fiberboards had admissible mechanical properties and dimensional stability. The manufactured boards displayed low thermal conductivity, which proved to be well competitive with other insulation materials. The fiberboards manufactured with PVAc adhesive and WP/RF ratio of 50/50 had higher fire resistance compared to other treatments. Additionally, results of thermal analysis showed that the use of PVAc adhesive and WP/RF ratio of 50/50 leads to improved thermal stability. Overall, the recycled fibers from MDF and paper wastes appear to be appropriate raw materials for manufacturing thermal insulation panels, and use of PVAc adhesive can significantly improve thermal and practical properties of insulation fiberboards.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47410733","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

Possibility of Use of NCC-Reinforced Melamine-Urea- Formaldehyde Adhesive in Plywood Manufacturing NCC增强三聚氰胺脲醛胶粘剂在胶合板生产中应用的可能性

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2021-07-22 DOI: 10.5552/drvind.2021.2029

Jakub Kawalerczyk, D. Dziurka, R. Mirski, J. Siuda, M. Babicka

引用次数: 1