Delignification treatment of birch veneer for manufacturing of highly curved laminated veneer lumber (LVL)

IF 2.4 3区 农林科学 Q1 FORESTRY
Fuqi Feng, Jiangling Bai, Jinda Peng, Lei He, Fangfang Liu, Yuanyuan Ma, Guowei Da, Chenzhuo Wei, Jiuli Lei, Juqing Cui
{"title":"Delignification treatment of birch veneer for manufacturing of highly curved laminated veneer lumber (LVL)","authors":"Fuqi Feng,&nbsp;Jiangling Bai,&nbsp;Jinda Peng,&nbsp;Lei He,&nbsp;Fangfang Liu,&nbsp;Yuanyuan Ma,&nbsp;Guowei Da,&nbsp;Chenzhuo Wei,&nbsp;Jiuli Lei,&nbsp;Juqing Cui","doi":"10.1007/s00107-024-02171-2","DOIUrl":null,"url":null,"abstract":"<div><p>Wood is an eco-friendly and renewable natural material. However, it cannot be easily shaped for curved products with mold-pressing technology while maintaining its intrinsic properties. In this study, different delignification treatments (acid, alkali, and combined acid–alkali) were applied to birch veneer for the manufacturing of highly curved laminated veneer lumber (LVL). The physical properties, including color, shrinkage, density, and mass loss, of treated birch veneers changed significantly after the delignification treatment. Characterization of lignin content and FTIR showed partial removal of lignin and hemicellulose. The crystallinity of treated birch veneer, calculated from XRD data, increased due to the reduction of the non-crystalline regions. SEM demonstrated that birch veneer and acid-treated veneer contain many hollow vessel structures and fibers, while alkali-treated and acid–alkali-treated veneers observed completely closed fibers. The magnified examination of alkali-treated birch veneer reveals a completed and smoothed crease, whereas acid–alkali-treated veneers exhibit rough creases with loose fibers. In contrast, untreated birch veneer and acid-treated veneers tend to fracture upon folding. Finally, highly curved LVL with minimal angles of 30° was prepared with alkali-treated veneers. Compressive performance increases from 8.7 MPa for curved LVL with angles of 120° to 19.8 MPa for curved LVL with angles of 30°. These findings could be used to manufacture shaped furniture, irregular building formwork, reconstituted decorative lumber and automobile interiors in the future.</p></div>","PeriodicalId":550,"journal":{"name":"European Journal of Wood and Wood Products","volume":"83 1","pages":""},"PeriodicalIF":2.4000,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00107-024-02171-2.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"European Journal of Wood and Wood Products","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s00107-024-02171-2","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"FORESTRY","Score":null,"Total":0}
引用次数: 0

Abstract

Wood is an eco-friendly and renewable natural material. However, it cannot be easily shaped for curved products with mold-pressing technology while maintaining its intrinsic properties. In this study, different delignification treatments (acid, alkali, and combined acid–alkali) were applied to birch veneer for the manufacturing of highly curved laminated veneer lumber (LVL). The physical properties, including color, shrinkage, density, and mass loss, of treated birch veneers changed significantly after the delignification treatment. Characterization of lignin content and FTIR showed partial removal of lignin and hemicellulose. The crystallinity of treated birch veneer, calculated from XRD data, increased due to the reduction of the non-crystalline regions. SEM demonstrated that birch veneer and acid-treated veneer contain many hollow vessel structures and fibers, while alkali-treated and acid–alkali-treated veneers observed completely closed fibers. The magnified examination of alkali-treated birch veneer reveals a completed and smoothed crease, whereas acid–alkali-treated veneers exhibit rough creases with loose fibers. In contrast, untreated birch veneer and acid-treated veneers tend to fracture upon folding. Finally, highly curved LVL with minimal angles of 30° was prepared with alkali-treated veneers. Compressive performance increases from 8.7 MPa for curved LVL with angles of 120° to 19.8 MPa for curved LVL with angles of 30°. These findings could be used to manufacture shaped furniture, irregular building formwork, reconstituted decorative lumber and automobile interiors in the future.

用于制造高弯曲层压单板(LVL)的桦木单板的脱木质素处理
木材是一种环保、可再生的天然材料。然而,在保持其固有特性的同时,它不能轻易地用模压技术对弯曲产品进行成型。在本研究中,采用不同的脱木质素处理(酸、碱和酸碱联合)对桦木单板进行脱木质素处理,以制造高弯曲的层压单板木材(LVL)。去木素处理后,桦木单板的物理性能,包括颜色、收缩率、密度和质量损失发生了显著变化。木质素含量和FTIR表征表明木质素和半纤维素被部分去除。根据XRD数据计算,处理后的桦木单板的结晶度由于非晶区减少而增加。扫描电镜显示,桦木单板和酸处理单板含有许多中空的血管结构和纤维,而碱处理和酸碱处理的单板观察到完全封闭的纤维。放大检查碱处理桦木单板显示一个完整的和平滑的折痕,而酸碱处理的单板表现出粗糙的折痕与松散的纤维。相反,未经处理的桦木单板和酸处理的单板在折叠时容易断裂。最后,用碱处理的贴面制备高度弯曲的LVL,最小角度为30°。弯曲LVL的抗压性能从120°角的8.7 MPa提高到30°角的19.8 MPa。这些发现可以用于制造异形家具、不规则建筑模板、重组装饰木材和未来的汽车内饰。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
European Journal of Wood and Wood Products
European Journal of Wood and Wood Products 工程技术-材料科学:纸与木材
CiteScore
5.40
自引率
3.80%
发文量
124
审稿时长
6.0 months
期刊介绍: European Journal of Wood and Wood Products reports on original research and new developments in the field of wood and wood products and their biological, chemical, physical as well as mechanical and technological properties, processes and uses. Subjects range from roundwood to wood based products, composite materials and structural applications, with related jointing techniques. Moreover, it deals with wood as a chemical raw material, source of energy as well as with inter-disciplinary aspects of environmental assessment and international markets. European Journal of Wood and Wood Products aims at promoting international scientific communication and transfer of new technologies from research into practice.
文献相关原料
公司名称
产品信息
阿拉丁
sodium chlorite (NaClO2)
阿拉丁
sodium chlorite
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信