摘要
以中山杉木材为原料,对其单板进行酚醛树脂浸渍增强处理,再与未处理单板按不同的层合结构复合制成单板层积材,并对其物理力学性能进行分析。结果表明:酚醛树脂通过孔隙结构进入木材内起到增强单板作用;在单板层积材结构中的表层和底层各复合1层浸渍增强单板,或在表层、底层及芯层各复合1层浸渍增强单板的组坯方法增强效果较好,单板层积材力学性能明显增强。经增强处理后,单板层积材的静曲强度和水平剪切强度都满足了结构用单板层积材的国家标准,部分组坯结构板材的弹性模量达到了国家标准结构用单板层积材的要求。
In this research,veneers of Taxodium hybrid were reinforced by phenol formaldehyde resin.And reinforced veneers and untreated veneers were composited with different lamination structure to manufacture laminated veneer lumber(LVL).And then the physical and mechanical properties were studied.Results indicated that phenol formaldehyde resin penetrated into the wood through pore structures and strengthen the veneer.The mechanical properties of laminated veneer lumber with the composite structure(the top and the bottom layers were laminated with PF reinforced veneer or the top,bottom,and core layers were laminated with PF reinforced veneer)were obviously improved.After the enhancement treatment,the modulus of rupture and the horizontal shear strength of the laminated veneer lumber met the national standard for structure,respectively.And the modulus of elasticity of some special structured LVL had been improved to meet the requirements of the national standard for structural laminated veneer lumber.
作者
袁朱润
潘彪
石江涛
李延军
陈继承
王新洲
Yuan Zhurun;Pan Biao;Shi Jiangtao;Li Yanjun;Chen Jicheng;Wang Xinzhou(College of Materials Science and Engineering,Nanjing Forestry University,Nanjing Jiangsu 210037,China)
出处
《西南林业大学学报（自然科学）》
CAS
北大核心
2020年第6期178-182,共5页
Journal of Southwest Forestry University：Natural Sciences
基金
江苏省自然科学基金青年项目(BK20180774)资助
浙江省湖州市科技项目(2019GN07)资助。
关键词
中山杉
单板层积材
物理力学性能
树脂
Taxodium hybrid
laminated veneer lumber
physical and mechanical performance
resin
