European Journal of Wood and Wood Products最新文献_第9页

Comparison of classical beam theory and finite element modelling of timber from fibre orientation data according to knot position and loading type 根据节疤位置和加载类型的纤维取向数据，比较经典梁理论和木材有限元模型

IF 2.4 3区农林科学

European Journal of Wood and Wood Products Pub Date : 2024-03-09 DOI: 10.1007/s00107-024-02055-5

Guillaume Pot, Robin Duriot, Stéphane Girardon, Joffrey Viguier, Louis Denaud

{"title":"Comparison of classical beam theory and finite element modelling of timber from fibre orientation data according to knot position and loading type","authors":"Guillaume Pot, Robin Duriot, Stéphane Girardon, Joffrey Viguier, Louis Denaud","doi":"10.1007/s00107-024-02055-5","DOIUrl":"10.1007/s00107-024-02055-5","url":null,"abstract":"<div><p>Timber mechanical properties assessment relies on grading methods that use non-destructive measurements in input, among which fibre orientation gives satisfactory outcomes. Several models exist in the literature to use fibre orientation data, based on either classical beam theory or finite element modelling. The present paper proposes to compare them for axial and bending loadings. To this end, the main approach was to use several artificial beams, for which fibre orientation was modelled around various knot positions in the tangential plane of wood. It is shown that beam theory modelling, despite considering the heterogeneity of moduli of elasticity in beam longitudinal direction, does not truly represent the actual deformations that can be depicted with finite element modelling. It results in significant differences in the accuracy of the assessment of the local modulus of elasticity, the finite element modelling being better. This finding was supported by experimental results obtained on laminated veneer lumber beams with a high knottiness. Additionally, this paper provides a comparison of different methods to compute localized moduli of elasticity that are typically used as strength predictors. The outcomes indicate that their behaviour depends on the loading type (axial or bending), the knot position in the beam, and the length of the sliding window across which they were computed. A localized bending modulus of elasticity (MoE) computed from the displacements, referred to as the 'apparent MoE', was defined in the objective to improve the accuracy of strength predictions.</p></div>","PeriodicalId":550,"journal":{"name":"European Journal of Wood and Wood Products","volume":"82 3","pages":"597 - 617"},"PeriodicalIF":2.4,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140097747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

The utilization of an olfactory machine in wood identification demonstrates a promising prospect: discerning disparities in emission profiles of volatile organic compounds between Picea abies and Pinus sylvestris 在木材识别中使用嗅觉机器展示了美好前景：辨别枞树和欧洲赤松之间挥发性有机化合物排放曲线的差异

IF 2.4 3区农林科学

European Journal of Wood and Wood Products Pub Date : 2024-03-07 DOI: 10.1007/s00107-024-02053-7

Alireza Nikoutadbir, Asghar Tarmian, Seyed Saeid Mohtasebi, Seyed Morteza Mohtasebi, Reza Oladi

{"title":"The utilization of an olfactory machine in wood identification demonstrates a promising prospect: discerning disparities in emission profiles of volatile organic compounds between Picea abies and Pinus sylvestris","authors":"Alireza Nikoutadbir, Asghar Tarmian, Seyed Saeid Mohtasebi, Seyed Morteza Mohtasebi, Reza Oladi","doi":"10.1007/s00107-024-02053-7","DOIUrl":"10.1007/s00107-024-02053-7","url":null,"abstract":"<div><p>In order to identify wood species for various purposes using the traditional method based on macro- and microscopic wood anatomy and physical characteristics, a comprehensive technical understanding of wood anatomy is crucial. However, in recent years, there has been growing interest in alternative wood identification methods. The use of intelligent systems that are able to identify species through the analysis of emitted odors can be a possible alternative to this task. As the capabilities of odor monitoring sensors continue to advance while their associated expenses concurrently decrease, it appears that the opportune moment has arrived for the implementation of automated, non-anthropogenic systems and methodologies for identifying wood. In this study, <i>Picea abies</i> L. and <i>Pinus sylvestris</i> L. were used to produce a set of odor fingerprints. An olfactory machine consisting of six metal oxide semiconductors was used to produce the specific odor profile of each species. Samples with a fresh planed surface were prepared. Overall, the odor characteristics obtained through the olfactory system using principal component analysis (PCA), support vector machine (SVM), and linear discriminant analysis (LDA) correctly distinguished two conifer species with 100% accuracy.</p></div>","PeriodicalId":550,"journal":{"name":"European Journal of Wood and Wood Products","volume":"82 3","pages":"591 - 596"},"PeriodicalIF":2.4,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140055248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Monitoring climatic impacts on the moisture uptake of the first Swiss wildlife bridge made of wood 监测气候对瑞士第一座木制野生动物桥吸湿性的影响

IF 2.4 3区农林科学

European Journal of Wood and Wood Products Pub Date : 2024-03-05 DOI: 10.1007/s00107-024-02052-8

Karim Ghazi Wakili, Marcus Schiere, Sébastien Bonifacio, Ulrich Kauz, Jan Maurer, Lukas Rüegsegger, Andreas Müller

{"title":"Monitoring climatic impacts on the moisture uptake of the first Swiss wildlife bridge made of wood","authors":"Karim Ghazi Wakili, Marcus Schiere, Sébastien Bonifacio, Ulrich Kauz, Jan Maurer, Lukas Rüegsegger, Andreas Müller","doi":"10.1007/s00107-024-02052-8","DOIUrl":"10.1007/s00107-024-02052-8","url":null,"abstract":"<div><p>Wildlife bridges represent a major component of any sustainable strategy to counteract the negative consequences of cutting the natural habitat of wildlife into disconnected parts by motorways and rail. This is especially true for a small and densely populated country such as Switzerland with diverse wildlife scattered through its territory. Up to now all wildlife bridges in Switzerland have been made of concrete with steel reinforcement. The wildlife bridge under investigation here is the first one in Switzerland made of wood-based materials. The idea of building a wildlife bridge by using wood-based materials represents besides a challenging technological endeavor also an ecological progress regarding embodied energy. A further advantage which resulted after realizing the construction, was the short interruption time it needed for installation on a motorway in operation. The most urgent question with respect to the wood-based elements is their moisture uptake when subjected to weather conditions. The present paper reports on a long-term monitoring of this wooden wildlife bridge over a period of approximately 2 years. Different kind of sensors, data from a nearby meteorological station, data regarding hourly number of different kind of vehicles passing beneath the wildlife bridge as well as lab measurements have been used to enable a robust and reliable statement on wooden wildlife bridges subjected to Swiss flatland weather conditions.</p></div>","PeriodicalId":550,"journal":{"name":"European Journal of Wood and Wood Products","volume":"82 3","pages":"717 - 729"},"PeriodicalIF":2.4,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00107-024-02052-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140034276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Effect of moisture content, heating time and temperature on the bending mechanical properties of Phyllostachys iridescens 含水量、加热时间和温度对鸢尾属植物弯曲机械性能的影响

IF 2.4 3区农林科学

European Journal of Wood and Wood Products Pub Date : 2024-02-24 DOI: 10.1007/s00107-024-02047-5

Xuehua Wang, Junjie Zhu, Yong Zhong, Fengbo Sun, Benhua Fei

{"title":"Effect of moisture content, heating time and temperature on the bending mechanical properties of Phyllostachys iridescens","authors":"Xuehua Wang, Junjie Zhu, Yong Zhong, Fengbo Sun, Benhua Fei","doi":"10.1007/s00107-024-02047-5","DOIUrl":"10.1007/s00107-024-02047-5","url":null,"abstract":"<div><p>Round bamboo is easy to be bent at high temperature. However, there’s a dearth research on bending properties of round bamboo in heating state. In order to investigate the optimal bending parameters in thermal treatment of round bamboo, this study assessed the influence of heating temperature, duration, and moisture content on the bending properties of round bamboo by examining the modulus of elasticity (MOE), modulus of rupture (MOR), and displacements. The findings indicated that the temperature of 160 °C could be considered as a priority, as it resulted in a 67.7% decrease in MOE, a 50.8% decrease in MOR, a 134% increase in elastic displacement (<i>D</i><sub><i>e</i></sub>), and a 160% increase in plastic displacement (<i>D</i><sub><i>p</i></sub>) compared to the control. Heating durations ranging from 5 to 15 min may be suitable for balancing cost and efficiency. Moreover, a moisture content (MC) exceeding 10% was found effectively to enhance the bendability of round bamboo. Specifically, when MC increased from 0 to 45%, the MOE decreased by 85.6%, the MOR decreased by 68.3%, <i>D</i><sub><i>p</i></sub> increased by 8.3%, and <i>D</i><sub><i>e</i></sub> increased by 110.3%. Based on these results, it can be inferred that round bamboo with MC above 10%, heated at 160 °C for a duration of 5 min to 15 min, can be easily bent.</p></div>","PeriodicalId":550,"journal":{"name":"European Journal of Wood and Wood Products","volume":"82 3","pages":"657 - 668"},"PeriodicalIF":2.4,"publicationDate":"2024-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139948945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Pressure agglomeration of raw, milled and cut-milled pine and poplar shavings: assessment of the compaction process and agglomerate strength 未加工、碾磨和切磨松木和杨木刨花的压力造粒：对压实过程和造粒强度的评估

IF 2.4 3区农林科学

European Journal of Wood and Wood Products Pub Date : 2024-02-22 DOI: 10.1007/s00107-024-02046-6

Paweł Tryjarski, Aleksander Lisowski, Jakub Gawron

{"title":"Pressure agglomeration of raw, milled and cut-milled pine and poplar shavings: assessment of the compaction process and agglomerate strength","authors":"Paweł Tryjarski, Aleksander Lisowski, Jakub Gawron","doi":"10.1007/s00107-024-02046-6","DOIUrl":"10.1007/s00107-024-02046-6","url":null,"abstract":"<div><p>The aim of the study was to investigate the densification characteristics of raw, milled, and cut-milled pine and poplar shavings and determine the strength parameters of pellets, pastilles, and granules. In producing agglomerates from hard pine shavings compared to plastic poplar shavings, 19% more specific compaction work was required with over 2-times more specific work to push the agglomerate out of the die opening. Pine agglomerates exhibited lower linear expansion than poplar agglomerates, achieving a higher single density. Due to the elevated content of thermoplastic lignin in the wood (30.7 and 18.4%, respectively), pine agglomerates demonstrated superior radial compression strength parameters, including specific deformation energy, maximum tensile stresses at which agglomerates cracked, and the highest modulus of elasticity. Agglomerates made of cut-milled shavings had the highest single density, but their tensile strength was significantly lower than that of agglomerates made from raw shavings. The susceptibility to densification of the shavings during sequentially repeated densification of small doses during pellet production was the highest, resulting in pellets characterised by the smallest linear and radial expansion, as well as the highest single density of 1081 kg·m<sup>–3</sup> and tensile strength among agglomerates. The smallest single density and strength were observed in granules produced with parameters recommended for particleboard production: a temperature of 170 °C and an agglomeration pressure of 12 MPa, compared to 93 °C and 70 MPa for pellets and pastilles, respectively. The higher temperature did not compensate for the much lower pressure. Shavings compaction parameters for granules are not recommended for particleboard production without a binder, typically urea–formaldehyde resin.</p></div>","PeriodicalId":550,"journal":{"name":"European Journal of Wood and Wood Products","volume":"82 3","pages":"885 - 903"},"PeriodicalIF":2.4,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139925967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Fungal resistance of Hevea brasiliensis (rubberwood) treated with nano-ZnO and nano-CuO dispersed linseed oil and paraffin wax nanoemulsion 用纳米氧化锌和纳米氧化铜分散亚麻籽油和石蜡纳米乳液处理的橡胶木的抗真菌性

IF 2.4 3区农林科学

European Journal of Wood and Wood Products Pub Date : 2024-02-17 DOI: 10.1007/s00107-024-02048-4

Richa Bansal, N. Mamatha, Rakesh Kumar, Krishna K. Pandey

{"title":"Fungal resistance of Hevea brasiliensis (rubberwood) treated with nano-ZnO and nano-CuO dispersed linseed oil and paraffin wax nanoemulsion","authors":"Richa Bansal, N. Mamatha, Rakesh Kumar, Krishna K. Pandey","doi":"10.1007/s00107-024-02048-4","DOIUrl":"10.1007/s00107-024-02048-4","url":null,"abstract":"<div><p>The biological resistance of rubberwood (<i>Hevea brasiliensis</i> Muell Arg.) treated with linseed oil and paraffin wax nanoemulsions containing zinc oxide (ZnO) and copper oxide (CuO) nanoparticles against a white-rot (<i>Trametes hirsuta</i>) and a brown-rot (<i>Oligoporos placenta</i>) fungus was investigated. Rubberwood specimens were treated with nano preservative formulations prepared by dispersing nano particles of ZnO and CuO (conc. 0.5–2.0% w/v) and exposed to brown-rot and white-rot fungus following IS-4873:2008 standard. The nanoemulsions containing ZnO and CuO nanoparticles exhibited good resistance to fungal decay, the efficacy of wood treated with CuO nanoparticles dispersed nanoemulsion was better than wood treated with ZnO nanoparticles dispersed nanoemulsion. Scanning electron microscopy and Fourier transform infrared (FTIR) spectroscopic analysis of decayed wood confirmed less degradation in nanoemulsion-treated wood compared to untreated specimens. This study depicts the nanoparticles dispersed wax and oil nanoemulsions as effective wood preservation strategy for enhancing the resistance of wood against wood decaying fungi.</p></div>","PeriodicalId":550,"journal":{"name":"European Journal of Wood and Wood Products","volume":"82 4","pages":"1095 - 1109"},"PeriodicalIF":2.4,"publicationDate":"2024-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139902763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Kraft lignin biorefinery: from pulping side streams to concrete plasticizers 牛皮纸木质素生物精炼厂：从制浆副流到混凝土增塑剂

IF 2.4 3区农林科学

European Journal of Wood and Wood Products Pub Date : 2024-02-15 DOI: 10.1007/s00107-024-02044-8

Caio César Zandonadi Nunes, Higor Brandão de Paula, Iara Fontes Demuner, Marcos Oliveira de Paula, Leonardo Gonçalves Pedroti, Ana Márcia Macedo Ladeira Carvalho

{"title":"Kraft lignin biorefinery: from pulping side streams to concrete plasticizers","authors":"Caio César Zandonadi Nunes, Higor Brandão de Paula, Iara Fontes Demuner, Marcos Oliveira de Paula, Leonardo Gonçalves Pedroti, Ana Márcia Macedo Ladeira Carvalho","doi":"10.1007/s00107-024-02044-8","DOIUrl":"10.1007/s00107-024-02044-8","url":null,"abstract":"<div><p>Kraft lignin is generated as a side stream of the kraft pulping process that is normally burnt to produce steam and energy. However, given its high availability as the second most abundant biopolymer, a lignin biorefinery is a promising approach to reach a sustainable bioeconomy. Nevertheless, this is still challenging because of lignin’s complex structure, low reactivity, and heterogeneity. The modification of lignin to produce lignosulfonates is a possible use once they have already been validated by the market as plasticizers in concrete mixtures, surfactants, etc. This work aimed to produce lignosulfonates from commercial eucalypt kraft lignin and heat-treated lignin by a sulfomethylation reaction, analyze their use as a concrete plasticizer, and compare them with a commercial admixture. The produced lignosulfonates presented a higher concentration in sulfur content, as no purification step was employed, but still a significant increase in water solubility from 7.2% to 98.8% when compared to kraft lignin. Cement pastes, as well as fresh and hardened concrete specimens were produced for the evaluation of the plasticizing performance. Moreover, the consistency (slump test) of fresh concrete, the axial compression strength of hardened concrete, and the viscosity of cement pastes were analyzed. In concentrations of around 2.2%, both kraft lignosulfonate and heat-treated lignosulfonate were found to display an increase in concrete workability from 75 to 95%. Therefore, both lignosulfonates were found to be promising since they present the potential to not only reduce water consumption in concrete preparation while maintaining similar resistance, but also improve waste management in kraft mills.</p></div>","PeriodicalId":550,"journal":{"name":"European Journal of Wood and Wood Products","volume":"82 3","pages":"849 - 860"},"PeriodicalIF":2.4,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139753590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Experimental and numerical study on the mechanical behavior of curved glulam structures 曲线胶合结构力学行为的实验和数值研究

IF 2.4 3区农林科学

European Journal of Wood and Wood Products Pub Date : 2024-02-14 DOI: 10.1007/s00107-023-02042-2

Shixing Zhao, Jingxian Zhao, Hongbo Liu, Fei He, Shuheng Yang, Zhihua Chen

引用次数: 0

Utilizing pyrolysis cleavage products from softwood kraft lignin as a substitute for phenol in phenol-formaldehyde resins for modifying different wood species 利用软木牛皮纸木质素的热解裂解产物作为苯酚-甲醛树脂中苯酚的替代品，对不同木种进行改性

IF 2.4 3区农林科学

European Journal of Wood and Wood Products Pub Date : 2024-02-09 DOI: 10.1007/s00107-024-02056-4

Johannes Karthäuser, Vladimirs Biziks, Daniel Roggatz, Holger Militz

{"title":"Utilizing pyrolysis cleavage products from softwood kraft lignin as a substitute for phenol in phenol-formaldehyde resins for modifying different wood species","authors":"Johannes Karthäuser, Vladimirs Biziks, Daniel Roggatz, Holger Militz","doi":"10.1007/s00107-024-02056-4","DOIUrl":"10.1007/s00107-024-02056-4","url":null,"abstract":"<div><p>Phenol-formaldehyde resins can be used for wood modification through an impregnation process and subsequent curing within the wood cell wall. Phenol is gained from non-renewable resources, and its substitution by renewable chemicals has been a research goal. A promising example for renewable phenol substituents are lignin-derived organic chemicals. Phenol-formaldehyde resins with such substitutions have been studied, however, knowledge of their application for wood modification is deficient. While there are attempts to modify pine and beech wood with this method, studies on other wood species are scarce. Considering the increasing use of different wood species in wood industry, determining the influence of the wood species on the modification quality is an important research goal. Therefore, in this study, vacuum-pressure impregnation of five wood species – Scots pine sapwood (<i>Pinus sylvestris</i>), Norway spruce (<i>Picea abies</i>), European beech (<i>Fagus sylvatica</i>), Silver birch (<i>Betula pendula</i>), and European aspen sapwood (<i>Populus tremula</i>) – with phenol-formaldehyde resins is described. Here, up to 45% of the phenol in the synthetic resin is substituted by vacuum low-temperature microwave-assisted pyrolysis cleavage products from commercial softwood kraft lignin. The solution uptake, weight% gain, leaching, and anti-swelling efficiency of the modified wood are analyzed and compared. The results indicate that up to 30% of the phenol can be substituted without significant decreases in the performance of the modification. The method gives comparable results for most of the wood species described herein, with exception of beech wood, for which the modification had a lower quality. The results could help to develop more environmentally friendly wood modification methods for several common European wood species.</p></div>","PeriodicalId":550,"journal":{"name":"European Journal of Wood and Wood Products","volume":"82 3","pages":"761 - 771"},"PeriodicalIF":2.4,"publicationDate":"2024-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00107-024-02056-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139753645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

SO2-alcohol-water (SAW) fractionation of Eldar pine (Pinus eldarica): effects of alcohol type on pulp and paper properties 埃达尔松（Pinus eldarica）的二氧化硫-酒精-水（SAW）分馏：酒精类型对纸浆和纸张性能的影响

IF 2.4 3区农林科学

European Journal of Wood and Wood Products Pub Date : 2024-02-04 DOI: 10.1007/s00107-024-02051-9

Aliasghar Tatari, Mohammadreza Dehghani Firouzabadi, Ali Ghasemian

{"title":"SO2-alcohol-water (SAW) fractionation of Eldar pine (Pinus eldarica): effects of alcohol type on pulp and paper properties","authors":"Aliasghar Tatari, Mohammadreza Dehghani Firouzabadi, Ali Ghasemian","doi":"10.1007/s00107-024-02051-9","DOIUrl":"10.1007/s00107-024-02051-9","url":null,"abstract":"<div><p>Generally, ethanol is the alcohol commonly used in the SO<sub>2</sub>-alcohol-water (SAW) fractionation process. In this study, Eldar pine (<i>Pinus eldarica</i>) was fractionated with different alcohols (methanol, isopropanol, and 2-methyl-2-propanol, in comparison to ethanol) at 135 °C, duration (60–120 min.), and liquor composition (SO<sub>2</sub>:alcohol:water = 12:44:44, w/w%) to achieve a consistent kappa number (∽25). The field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR) were used to analyze the changes in physical and chemical structure characteristics of selected pulps. The use of isopropanol, as opposed to ethanol (common alcohol in SAW fractionation), showed a beneficial effect on the delignification rate. Meanwhile, both methanol and 2-methyl-2-propanol reduced the delignification rate. Moreover, isopropanol pulp required fewer beating revolutions to achieve a similar freeness (∽385 mL CSF) compared to other alcohols. Handsheets produced from isopropanol fractionation exhibited superior characteristics, including air permeability, apparent density, and tensile, tear, and burst indexes, when compared to those obtained from other alcohols. Overall, isopropanol is a highly suitable alternative to ethanol in SAW fractionation.</p></div>","PeriodicalId":550,"journal":{"name":"European Journal of Wood and Wood Products","volume":"82 3","pages":"833 - 847"},"PeriodicalIF":2.4,"publicationDate":"2024-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139677719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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