Wood Science and Technology最新文献_第3页

Determination of local mechanical properties of clear wood in relation to the local fiber deviation 根据局部纤维偏差确定清材的局部机械特性

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2024-11-13 DOI: 10.1007/s00226-024-01607-5

L. Demoulin, G. Pot, L. Denaud, S. Girardon, B. Marcon

{"title":"Determination of local mechanical properties of clear wood in relation to the local fiber deviation","authors":"L. Demoulin, G. Pot, L. Denaud, S. Girardon, B. Marcon","doi":"10.1007/s00226-024-01607-5","DOIUrl":"10.1007/s00226-024-01607-5","url":null,"abstract":"<div><p>Products made with veneers such as Laminated Veneer Lumber can reach higher properties than solid wood because the defects such as knots (but not only) are distributed among the various layers. Visual sorting, even using automatic grading, is only partially efficient for evaluating mechanical properties, which mainly depends on the fiber orientation and the density both at local scale. An experimental protocol has been established to correlate the nondestructive (fiber orientation and density) estimation and the destructive (tensile test) measurement of beech veneer wood. The aim is to understand the impact of the small imperfections on clear wood in fiber orientation on the mechanical properties. In the present study, wood veneer is assumed to be a transverse isotropic material due to the predominant wood fiber direction in the growth direction of the tree. Experimental measurements of modulus of elasticity are based on Digital Image Correlation (DIC) and virtual extensometer. The Young modulus model is based on a composite material model that considers fiber orientation and density. The Young modulus model is used to determine longitudinal, transverse, and shear moduli, for specimens with angles ranging from 0 to 45°. Mechanical properties are obtained by mathematical minimization between experimental and model data. The coefficient of determination obtained was 0.97. The measure of the fiber angle with a resolution of 1 × 1 mm<sup>2</sup> and the tensile test with the DIC, both local, significantly improve Young modulus measurement compared to previous studies’ assessment accuracy and allow for a better understanding of the wood behavior.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"59 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Early detection of heartwood rot caused by Fistulina hepatica in Castanea sativa productive coppices through low-invasive resistance drilling 通过低侵入性抗性钻探，及早发现蓖麻高产灌木中由肝蓟马引起的心材腐烂病

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2024-11-13 DOI: 10.1007/s00226-024-01616-4

Andreu Meijer, E. Jordán Muñoz-Adalia, Eduard Correal-Mòdol, Carlos Colinas

{"title":"Early detection of heartwood rot caused by Fistulina hepatica in Castanea sativa productive coppices through low-invasive resistance drilling","authors":"Andreu Meijer, E. Jordán Muñoz-Adalia, Eduard Correal-Mòdol, Carlos Colinas","doi":"10.1007/s00226-024-01616-4","DOIUrl":"10.1007/s00226-024-01616-4","url":null,"abstract":"<div><p>Chestnut Red Stain (CRS) is a heartwood discoloration that widely affects <i>Castanea sativa</i> Mill. productive coppice stands in the northeast of Spain. At the early stages of infection, the structural properties of the wood are not affected, but still its economic value drops up to 70% due to the rejection of this wood. This disease is caused by the fungus <i>Fistulina hepatica</i> (Schaeff.) With. and causes uncertainty to forest managers since the fungal infection is virtually impossible to detect before felling. The objective of this work was to develop an efficient detection method to evaluate the presence of <i>F. hepatica</i> in early stages of productive periods. A total of 72 chestnuts were analyzed through molecular methods to determine the presence of <i>F. hepatica</i> and with an IML resistance drill to characterize their wood. Thirteen wood quality indices were calculated and their correlation with the presence of the pathogen was evaluated using linear mixed models. We found clear differences between healthy and infected trees in four indices. A new specific index (Chestnut Red Stain Danger index) was designed to estimate the probability of infection by <i>F. hepatica</i>. The results support the hypothesis that the early presence of <i>F. hepatica</i> is detectable through inexpensive and fast mechanical methods early in a rotation. The results of this work will help forest managers evaluate the incidence of CRS, as well as it establishes a novel methodology for further development of resistance drilling techniques for heartwood rot detection.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"59 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00226-024-01616-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterizing the chemistry of artificially degraded Scots pine wood serving as a model of naturally degraded waterlogged wood using1H–13C HSQC NMR 利用 1H-13C HSQC NMR 分析作为自然降解水渍木材模型的人工降解苏格兰松木的化学特征

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2024-11-13 DOI: 10.1007/s00226-024-01618-2

Daniel J. Yelle, Magdalena Broda

{"title":"Characterizing the chemistry of artificially degraded Scots pine wood serving as a model of naturally degraded waterlogged wood using1H–13C HSQC NMR","authors":"Daniel J. Yelle, Magdalena Broda","doi":"10.1007/s00226-024-01618-2","DOIUrl":"10.1007/s00226-024-01618-2","url":null,"abstract":"<div><p>Chemically and biologically degraded Scots pine wood was prepared as a model material for the research on new conservation agents for waterlogged archeological wood. In this study, the model wood was characterized using a 2D<sup>1</sup>H–<sup>13</sup>C solution-state NMR technique without derivatization, isolation, or extraction to assess the effect of applied degradation processes on its chemical composition and structure. The results clearly show how the two artificially degraded model wood types are chemically different. Biological decay by the brown-rot fungus <i>Coniophora puteana</i> caused degradation of wood polysaccharides, with heavy depletion in arabinan, mannan, and galactan, along with an increase in the cellulose's reducing ends (i.e., lowering the degree of polymerization) and partial deacetylation of mannan. The fungus cleaved roughly one-fifth of the β-aryl ethers in lignin, leading to a broadening effect on the lignin aromatic unit contours; other lignin sidechains were left untouched. Chemical degradation by NaOH hydrolysis resulted in a depletion in mannan, galactan, and glucan, as well as efficient deacetylation of mannan. It also decreased lignin content, causing changes in its structure; minor β-aryl ether cleavage along with substantial phenylcoumaran cleavage were evident. Detailed knowledge about the chemical composition and structure of artificially degraded model pine wood obtained in this research is necessary to understand the reactivity of these wood types with chemicals used for their conservation. This research will help explain the differences in the stabilization effectiveness observed between these wood types treated during conservation and understand the stabilization mechanisms, thus contributing to developing new, more effective conservation agents for wooden artifacts of Cultural Heritage.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"59 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00226-024-01618-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of plant source selection and chemi-mechanical treatment on the fiber microstructures and mechanical behaviors of nanocellulose films 植物来源选择和化学机械处理对纳米纤维素薄膜的纤维微结构和机械性能的影响

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2024-11-09 DOI: 10.1007/s00226-024-01613-7

Yangyang Qian, Chunyu Wang, Yijun Liu, Bingfei Shi, Jianqiang Zhang, Yuan Wei, Gang Chen

{"title":"Effects of plant source selection and chemi-mechanical treatment on the fiber microstructures and mechanical behaviors of nanocellulose films","authors":"Yangyang Qian, Chunyu Wang, Yijun Liu, Bingfei Shi, Jianqiang Zhang, Yuan Wei, Gang Chen","doi":"10.1007/s00226-024-01613-7","DOIUrl":"10.1007/s00226-024-01613-7","url":null,"abstract":"<div><p>Cellulose nanofibers (CNFs) were isolated and prepared from six different plant sources (Nordic pine, poplar, cotton, flax, bamboo, and pineapple leaf fibers) through a carboxymethylation-homogenization treatment. The surface morphologies, size distributions, and chemical structures of the CNFs and their microfibers were investigated in detail. Atomic force microscopy (AFM) analysis showed that all kinds of CNFs had uniform diameters of less than 10 nm. However, the length and aspect ratio of CNFs exhibited significant differences due to the differences of anatomical characteristics from pulp species. Among these six nanofibers, the pineapple leaf-based nanofibers had the highest length of ca. 2.21 μm and aspect ratio of ca. 1263. Meanwhile, the resulting pineapple leaf-based nanocellulose film possessed the strongest tensile strength (229.0 ± 9.8 MPa) and toughness (33.9 ± 2.9 MJ/m<sup>3</sup>). Interestingly, the aspect ratio of cotton nanofibers was only 556, lower than that of bamboo, Nordic pine, and flax nanofibers, but the tensile strength (210.6 ± 4.8 MPa) and toughness (22.4 ± 0.6 MJ/m<sup>3</sup>) of cotton-based nanocellulose film were second only to the pineapple leaf-based nanocellulose film. The critical reason is that the cotton-based nanocellulose exhibited the highest crystallinity index (76.6%), superior to the other source-based nanocellulose. These results suggested that the high aspect ratio or high crystallinity are responsible for the excellent mechanical strengths of the nanocellulose film. This work sheds light on the preparation and selection of highly spindly or crystalline nonwood nanofibrils, suggesting that the pineapple leaf or cotton nanofibers have great potential as strength additives for nanocomposites.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"59 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142598905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

UV light-induced photodegradation of condensed tannins: obtaining bayberry tannins with different mean polymerization degrees 紫外线诱导缩合单宁的光降解：获得不同平均聚合度的杨梅单宁

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2024-11-07 DOI: 10.1007/s00226-024-01603-9

Ying Zhou, Yan Zhang, Yuting Zhang, Wenjing Hu, Shuguang Han

{"title":"UV light-induced photodegradation of condensed tannins: obtaining bayberry tannins with different mean polymerization degrees","authors":"Ying Zhou, Yan Zhang, Yuting Zhang, Wenjing Hu, Shuguang Han","doi":"10.1007/s00226-024-01603-9","DOIUrl":"10.1007/s00226-024-01603-9","url":null,"abstract":"<div><p>Condensed tannins (CTs) characterized by a low degree of polymerization (DP) are recognized to have substantial value for applications across diverse industrial sectors, including food production, pharmaceuticals, and wood adhesive manufacturing. To acquire CTs with a low DP, the depolymerization of bayberry tannins (BTs) through a novel approach utilizing UV light-driven photocatalytic degradation, facilitated by the ultrasonic dispersion of TiO<sub>2</sub> nanoparticles was investigated. Under the optimal degradation conditions (a tannin concentration of 6%, a TiO<sub>2</sub> nanoparticles loading amount of 0.20%, and a degradation time of 4 h), the study delineated a discernible linear relationship correlating both the degradation time with the formaldehyde reactivity of the photocatalytic degradation products, and the formaldehyde reactivity with the mean degree of polymerization (mDP) of these photocatalytic degradation products. With the establishment of these correlative relationships, it is feasible to systematically control the degradation process of BTs. The photocatalytic degradation process adhered to the following mechanism: The degradation process of BTs is initiated by the cleavage of the C4-C8 bond which, at the incipient stage of degradation, results in the elimination of one gallocatechin gallate unit and one gallocatechin unit, or alternatively, the removal of a gallocatechin dimer. During the advanced stages of degradation, the opening of the C ring gives rise to different derivatives. Upon establishing optimal degradation parameters, it was observed that the primary constituents of the photocatalytic degradation products were dimers. The utilization of photocatalytic degradation exhibited an ability to break down condensed tannins in a manner that is both controllable and in an environmentally friendly way.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"59 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142595561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Tangential veneer fabrication of Fenton-like catalyst for the removal of organic dye from wastewater 用于去除废水中有机染料的类芬顿催化剂切向单板制备技术

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2024-11-07 DOI: 10.1007/s00226-024-01608-4

Jiani Zhou, Gonggang Liu, Xuebing Yi, Yuanyuan Liao, Chongqing Wang, Shanshan Chang, Jinbo Hu

引用次数: 0

Tuning the antioxidant and antibacterial properties of lignin by physicochemical modification during sequential acid precipitation from Kraft black liquor 在从牛皮纸黑液中进行连续酸沉淀的过程中，通过物理化学改性调整木质素的抗氧化和抗菌特性

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2024-11-07 DOI: 10.1007/s00226-024-01612-8

María E. Eugenio, Luisa García-Fuentevilla, Raquel Martín-Sampedro, José I. Santos, Bernd Wicklein, David ibarra

{"title":"Tuning the antioxidant and antibacterial properties of lignin by physicochemical modification during sequential acid precipitation from Kraft black liquor","authors":"María E. Eugenio, Luisa García-Fuentevilla, Raquel Martín-Sampedro, José I. Santos, Bernd Wicklein, David ibarra","doi":"10.1007/s00226-024-01612-8","DOIUrl":"10.1007/s00226-024-01612-8","url":null,"abstract":"<div><p>Turning lignin from black liquor waste into value-added bioactive agents is one of the possible routes for improving the sustainability and profitability of lignocellulosic industry. However, due to chemical and structural variability of lignin, it is necessary to isolate specific lignin fractions from black liquor with the purpose to achieve samples with unique chemical and structural characteristics and therefore, specific biological activities. In this study, poplar lignin fractions isolated from Kraft black liquor by sequential acid precipitation at pH´s 7.5, 5 and 2.5 (denoted as P-7.5, P-5 and P-2.5) were characterized according to their physicochemical, antioxidant and antibacterial properties. In general, lignin fractions displayed a wide elimination of lateral chains (aryl-β ether and C–C) and, therefore a high phenolic content and low molecular weight, as the pH sequential precipitation was decreased from 7.5 to 2.5. Moreover, thermal analysis revealed that the P-7.5 lignin fraction showed higher thermal stability than P-2.5 and P-5. In terms of antioxidant activity, the P-7.5 lignin fraction, with a higher S/G ratio and a less oxidized structure compared to P-5 and P-2.5, exhibited higher antioxidant activity. In addition, lower antibacterial effect was observed for all lignin fractions against <i>Escherichia coli</i> compared to that obtained against <i>Staphylococcus aureus.</i> Among them, the P-2.5 and P-5 fractions, with higher phenolic content and lower molecular weight values than P-7.5, showed a greater antibacterial effect against <i>S. aureus</i>.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"59 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00226-024-01612-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142595241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel cross-flow Ag/wood composite filter for high-concentration organic dye wastewater treatment 用于高浓度有机染料废水处理的新型横流 Ag/wood 复合过滤器

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2024-11-06 DOI: 10.1007/s00226-024-01605-7

Gensheng Wu, Tong Su, Pingan Li, Yunfeng Gu, Weiyu Chen, Bo Yu

{"title":"A novel cross-flow Ag/wood composite filter for high-concentration organic dye wastewater treatment","authors":"Gensheng Wu, Tong Su, Pingan Li, Yunfeng Gu, Weiyu Chen, Bo Yu","doi":"10.1007/s00226-024-01605-7","DOIUrl":"10.1007/s00226-024-01605-7","url":null,"abstract":"<div><p>Dye wastewater produced from industry production is difficult to degrade naturally. Natural wood possesses a hierarchical and three-dimensional (3D) interconnected microstructure, making it a desirable material for water treatment. However, limited water transport pathways can reduce the efficiency of removing high-concentration organic dyes. To address this, we present a low-cost, scalable, and efficient cross-flow Ag/wood composite filter by combing the structural design and hydrothermal treatment using a silver-ammonia solution. Silver ions (Ag<sup>+</sup>) are effectively reduced to silver nanoparticles (Ag NPs) by wood lignin and then anchored by hydroxyl groups in the cellulose and hemicellulose of the wood. Importantly, the incorporation of Ag NPs does not compromise the 3D porous structure of the wood. Diagonal grooves and exposed channels on both sides of the filter guide pollutants, ensuring extensive interaction with Ag NPs along elongated reaction pathways and through microstructural vessel disturbances. An 8 mm-thick cross-flow Ag/wood composite filter, featuring grooves with a diameter of 15 mm and a depth of 4 mm, achieves a remarkable 99% degradation efficiency of methylene blue (MB) at a water flux of up to 1775 L/(m<sup>2</sup>∙h). The performance in water flux and decolorization efficiency hinges significantly on groove diameter, groove depth, and filter thickness. This cross-flow Ag/wood composite filter represents a promising advancement for rapid and effective removal of various organic pollutants in a single-step process, showcasing extensive potential for applications in water treatment. This work aims to enhance clarity and readability while maintaining the technical details and impact of the research.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"59 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142595534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Impregnation of wood with water using ultrasonic irradiation and water containing bulk nanobubbles 利用超声波辐照和含有大量纳米气泡的水对木材进行水浸渍

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2024-11-02 DOI: 10.1007/s00226-024-01611-9

Toru Tuziuti, Kyuichi Yasui, Wataru Kanematsu

引用次数: 0

Acetylation of reed (Arundo donax) to prevent the contact dermatitis of woodwind musicians 对芦苇（Arundo donax）进行乙酰化处理，防止木管乐器演奏家患上接触性皮炎

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2024-11-01 DOI: 10.1007/s00226-024-01604-8

Yoshikazu Arai, Eiichi Obataya, Akiko Nakagawa-Izumi, Naoko Okiyama

引用次数: 0