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International Wood Products Journal最新文献

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Estimation of design load and distribution pattern for wooden classroom chairs in use at secondary schools in Ibadan, Nigeria 尼日利亚伊巴丹中学使用的木制教室椅的设计荷载和分布模式估计
IF 1.1
International Wood Products Journal Pub Date : 2022-05-07 DOI: 10.1080/20426445.2022.2071560
N. A. Adewole, A. Olorunnisola, E. B. Lucas
{"title":"Estimation of design load and distribution pattern for wooden classroom chairs in use at secondary schools in Ibadan, Nigeria","authors":"N. A. Adewole, A. Olorunnisola, E. B. Lucas","doi":"10.1080/20426445.2022.2071560","DOIUrl":"https://doi.org/10.1080/20426445.2022.2071560","url":null,"abstract":"ABSTRACT The absence of an established design load constitutes a challenge to the engineering design of classroom furniture. This study developed a methodology for estimating design loads for single user (SU) and multiple user (MU) wooden classroom chair and desk combinations offered to secondary school students in Ibadan, Oyo State, Nigeria. Service load distribution patterns for the chair and desk members in normal, backward and front-reclining sitting postures were determined for 15 girls and 15 boys using bathroom scales. A T-test was used to compare the significance of the means of the proportions of users’ weights transferred to the chair and the floor. Design loads were 1 kN (SU) and 2.7 kN (MU) for chair and desk configurations, respectively. Each SU and MU leg should be designed to support 35% and 40% of the service loads, respectively. Gender, sitting postures, and chair and desk designs influenced load distribution patterns significantly.","PeriodicalId":14414,"journal":{"name":"International Wood Products Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49650150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Wood cells characterization and suitability appraisal of 7- and 9-year-old Cedrela odorata L. (Miliaceae) wood for paper-based products manufacturing 7年和9年生香柏木的木材细胞特征及造纸适宜性评价
IF 1.1
International Wood Products Journal Pub Date : 2022-05-07 DOI: 10.1080/20426445.2022.2071559
P. Dadzie, M. Amoah, P. Inkum, E. Boampong, Victor Owusu Ansah Jnr
{"title":"Wood cells characterization and suitability appraisal of 7- and 9-year-old Cedrela odorata L. (Miliaceae) wood for paper-based products manufacturing","authors":"P. Dadzie, M. Amoah, P. Inkum, E. Boampong, Victor Owusu Ansah Jnr","doi":"10.1080/20426445.2022.2071559","DOIUrl":"https://doi.org/10.1080/20426445.2022.2071559","url":null,"abstract":"ABSTRACT This study sought to appraise 7-year and 9-year-old Cedrela odorata for pulp and paper making. Sectioning and maceration processes were adopted. Data were subjected to statistical analysis using SPSS version 17.00. Cell characteristics for all ages and tree positions appeared similar but quantitatively, cells in 9-year-old generally exhibited some significant (p < .05) variations. Age and wood position generally had some significant influence on cell characteristics. Fibre lengths were generally short (<1.6 mm or 1600 μm) with variations in fibre morphology being significant axially than radially. In appraising the wood for paper production, derived fibre indices/values viz; Runkel ratio (ranging from 0.19 to 0.28), flexibility coefficient (ranging from 0.78 to 0.83), and slenderness ratio (ranging from 38.98 to 51.72) appeared to provide some positive indications. The species therefore, has potential for pulp and paper production, but further studies on its chemical consumption levels and other properties need to be ascertained towards a well-informed decision.","PeriodicalId":14414,"journal":{"name":"International Wood Products Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41484920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Non-destructive acoustic assessment of wood quality in trees and logs and the effects of silvicultural treatments: a review 树木和原木木材质量的无损声学评价和造林处理的影响:综述
IF 1.1
International Wood Products Journal Pub Date : 2022-04-08 DOI: 10.1080/20426445.2022.2061255
K. Olaoye, M. Ojo
{"title":"Non-destructive acoustic assessment of wood quality in trees and logs and the effects of silvicultural treatments: a review","authors":"K. Olaoye, M. Ojo","doi":"10.1080/20426445.2022.2061255","DOIUrl":"https://doi.org/10.1080/20426445.2022.2061255","url":null,"abstract":"ABSTRACT Assessing intrinsic wood qualities such as modulus of elasticity and internal decay in trees and logs can be challenging. However, acoustic technologies have been investigated for a possible solution. This paper reviews available literature on non-destructive acoustic methods for assessing wood quality, both in tree and log form. The paper further reviews the effects of silvicultural practices (such as thinning and pruning) on wood quality assessed by non-destructive acoustic methods. We documented some of the benefits of application of non-destructive acoustic methods on wood quality of trees and logs. The acoustic velocity of a tree (VT) or log (VL) of the propagated waves and wood density can be used to determine the Dynamic Modulus of Elasticity (MOEd). Thinning was reported to affect VT/VL and MOEd negatively. Acoustic tomography methods were equally found to have good accuracy in detecting the location and extent of wood decay in standing trees and logs.","PeriodicalId":14414,"journal":{"name":"International Wood Products Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44165936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Preparation of phenol-formaldehyde resin modified with phenol-rich pine needle pyrolysis oil and assessment of bonding strength 富酚松针热解油改性酚醛树脂的制备及粘结强度评价
IF 1.1
International Wood Products Journal Pub Date : 2022-04-07 DOI: 10.1080/20426445.2022.2061254
Tarannum Jahan, Brijesh Lekhak, A. K. Verma, A. Dubey, T. Bhattacharya
{"title":"Preparation of phenol-formaldehyde resin modified with phenol-rich pine needle pyrolysis oil and assessment of bonding strength","authors":"Tarannum Jahan, Brijesh Lekhak, A. K. Verma, A. Dubey, T. Bhattacharya","doi":"10.1080/20426445.2022.2061254","DOIUrl":"https://doi.org/10.1080/20426445.2022.2061254","url":null,"abstract":"ABSTRACT The pine needles bio-oil was partially replaced with phenol-formaldehyde (PF) resin at a rate of up to 40% by weight. The wood adhesive characteristics of a newly produced bio-oil phenol-formaldehyde (BOPF) resin with 10% bio-oil replacements was found to be comparable to those of pure PF resin with similar shear strength. DSC revealed that the curing temperature of 20 wt-% BOPF resin decreased from 95 to 60°C. Thermal degradation of BOPF resins was somewhat lower than that of pure PF resin, according to TGA and DTG data, and was similar in 10 and 20 wt-% BOPF resins. The presence of methylene bridges between phenols shown by FTIR analysis indicated that the wood adhesive had a good quality. According to SEM examination, the 10 and 20% BOPF resins showed a flat microstructure comparable to the pure PF resin.","PeriodicalId":14414,"journal":{"name":"International Wood Products Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48547618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
In this issue 本期
IF 1.1
International Wood Products Journal Pub Date : 2022-04-03 DOI: 10.1080/20426445.2022.2060916
G. Sawyer
{"title":"In this issue","authors":"G. Sawyer","doi":"10.1080/20426445.2022.2060916","DOIUrl":"https://doi.org/10.1080/20426445.2022.2060916","url":null,"abstract":"a","PeriodicalId":14414,"journal":{"name":"International Wood Products Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44621244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Improved adhesive-bond performance in copper azole and disodium octaborate tetrahydrate-treated Eucalyptus grandis laminates 唑铜和四水合八酸二钠处理的桉树层压板粘接性能的改善
IF 1.1
International Wood Products Journal Pub Date : 2022-04-02 DOI: 10.1080/20426445.2022.2058277
A. Alade, C. B. Wessels, Hannes Stolze, H. Militz
{"title":"Improved adhesive-bond performance in copper azole and disodium octaborate tetrahydrate-treated Eucalyptus grandis laminates","authors":"A. Alade, C. B. Wessels, Hannes Stolze, H. Militz","doi":"10.1080/20426445.2022.2058277","DOIUrl":"https://doi.org/10.1080/20426445.2022.2058277","url":null,"abstract":"ABSTRACT The prospect of manufacturing durable structural laminated wood with copper and boron-based preservative-impregnated Eucalyptus grandis wood was previously investigated but revealed adhesive-bond performance below standard requirements. In this study, bonding process factors, viz. mechanical pretreatment (surface planing) and bonding pressure in conjunction with wood preservative and adhesive compatibility for improved bond performance in preservative-treated E. grandis laminates were investigated. The results obtained showed significant and satisfactory improvement in shear strength and delamination resistance of E. grandis laminates based on EN 14080:2013 [Timber structures — Glued laminated timber and glued solid timber — Requirements, BSI Stand. Publ. (2014) 1–110] requirements. The suitability of polyurethane, melamine-urea-formaldehyde, and phenol-resorcinol-formaldehyde adhesives for bonding copper azole (CA) and disodium octaborate tetrahydrate (DOT)-impregnated E. grandis wood was established. Satisfactory pathways, including greener process routes for manufacturing CA and DOT-impregnated E. grandis laminates for structural applications in tropical and subtropical climes were achieved. The established processes could be readily adopted industrially to enhance the global implementation of solid wood composites and promote hardwood bonding.","PeriodicalId":14414,"journal":{"name":"International Wood Products Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42126612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Strength grading of timber in the UK and Ireland in 2021 2021年英国和爱尔兰木材强度分级
IF 1.1
International Wood Products Journal Pub Date : 2022-03-19 DOI: 10.1080/20426445.2022.2050549
D. Ridley-Ellis, David Gil-Moreno, A. Harte
{"title":"Strength grading of timber in the UK and Ireland in 2021","authors":"D. Ridley-Ellis, David Gil-Moreno, A. Harte","doi":"10.1080/20426445.2022.2050549","DOIUrl":"https://doi.org/10.1080/20426445.2022.2050549","url":null,"abstract":"ABSTRACT This paper summarises the state of the art for strength grading of construction timber grown in the United Kingdom and the Republic of Ireland. It includes the latest approvals based on recent research on spruce, larch and Douglas-fir. It lists the following information along with the primary references: visual grading grades and strength class assignments; grading machines with approved settings for machine control grading; the species, size ranges and strength class combinations covered; and grade determining properties of specific strength classes for the UK and Irish markets. This paper is useful for those grading timber, and those specifying UK and Irish grown timber.","PeriodicalId":14414,"journal":{"name":"International Wood Products Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46488047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Preparation and properties of a modified corn flour-lignin-glyoxal as a Green wood adhesive 改性玉米粉木质素乙二醛绿色木材胶粘剂的制备与性能
IF 1.1
International Wood Products Journal Pub Date : 2022-03-11 DOI: 10.1080/20426445.2022.2048338
H. Younesi-Kordkheili, A. Pizzi
{"title":"Preparation and properties of a modified corn flour-lignin-glyoxal as a Green wood adhesive","authors":"H. Younesi-Kordkheili, A. Pizzi","doi":"10.1080/20426445.2022.2048338","DOIUrl":"https://doi.org/10.1080/20426445.2022.2048338","url":null,"abstract":"ABSTRACT A corn flour- lignin-glyoxal (CLG) green wood adhesive was prepared by esterification and polyisocyanate prepolymer crosslinking of corn flour. At first corn flour was esterified by maleic anhydride and 10% polyisocyanate was added to it. The modified corn flour was then added at various contents (2, 4 and 6% on resin solids) to phenolated lignin and glyoxal solution to obtain the CLG resin. According to the FTIR spectra, the ester groups (-C=O) at 1730 cm-1 increased due to the esterification of corn flour by maleic anhydride. The addition of the modified corn flour significantly increased the viscosity and solid content and accelerated the gelation time of CLG resins. DSC analysis indicated that increasing the modified corn flour continuously decreases the gel onset and curing temperatures of the resin. Greater mechanical strength and higher dimensional stability of panels bonded with CLG resins can be obtained by modification of corn flour.","PeriodicalId":14414,"journal":{"name":"International Wood Products Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49341880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The improvement of the circular saw cutting unit using linear induction drive 直线感应驱动圆锯切割装置的改进
IF 1.1
International Wood Products Journal Pub Date : 2022-02-21 DOI: 10.1080/20426445.2022.2039984
V. Melekhov, I. Solovev, Aleksandr Vladimirovich Emelyanov, T. V. Tyurikova, E. Sazanova
{"title":"The improvement of the circular saw cutting unit using linear induction drive","authors":"V. Melekhov, I. Solovev, Aleksandr Vladimirovich Emelyanov, T. V. Tyurikova, E. Sazanova","doi":"10.1080/20426445.2022.2039984","DOIUrl":"https://doi.org/10.1080/20426445.2022.2039984","url":null,"abstract":"ABSTRACT The new drive for circular saw cutting unit, implementing linear induction motor (LIM), was suggested. The mathematical model for the arc drive of the saw cutting unit was developed, based on the two-dimensional theory. The new technology to improve performance of LIM, driving circular saw, was proposed. According to this technology, thin copper plates are placed on the saw surface, causing a better power factor of such linear induction drive. The series of experiments were conducted. The achieved results show a good match with theoretical calculations, confirming the developed mathematical model. The examined drive with copper-plated disc saw revealed significant improvements to the electrical and mechanical characteristics of such combined linear induction drive.","PeriodicalId":14414,"journal":{"name":"International Wood Products Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46856453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluation of Erythrina fusca Lour. as a pulping raw material 红赤藓的评价。作为制浆原料
IF 1.1
International Wood Products Journal Pub Date : 2022-02-18 DOI: 10.1080/20426445.2022.2039983
M. Rahman, E. Jahan, Jannatun Nayeem, K. M. Y. Arafat, A. Sarwar, M. Uddin, M. Jahan
{"title":"Evaluation of Erythrina fusca Lour. as a pulping raw material","authors":"M. Rahman, E. Jahan, Jannatun Nayeem, K. M. Y. Arafat, A. Sarwar, M. Uddin, M. Jahan","doi":"10.1080/20426445.2022.2039983","DOIUrl":"https://doi.org/10.1080/20426445.2022.2039983","url":null,"abstract":"ABSTRACT This paper characterizes Erythrina fusca Lour. in terms of anatomical, morphological and chemical properties to evaluate its efficacy as a pulping raw material. It is characterized with 47.0% α-cellulose and 28.8% lignin content with a fibre length of 1.11 mm. The vessels (pores) are distinct and form porous semi-rings, with a row of larger pores at the beginning of the growth layer, which facilitate penetration of chemicals during the cooking phase of pulping. Kraft pulping of E. fusca was carried out by varying cooking temperature, time and alkali charge. At optimum condition of 14% active alkali for 2 h of cooking at 170°C, pulp yield was 40% with kappa number of 26.6. The papermaking properties were also evaluated and showed tensile index of 52.4 N m g−1 with tear index of6.8 mN m2 g−1 at oSR of 57. This species can be used as a raw material for writing and printing grade pulp.","PeriodicalId":14414,"journal":{"name":"International Wood Products Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49006332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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