木材科学与技术2024，Vol.38Issue(3)：33-39,55,8.DOI:10.12326/j.2096-9694.2023178
三聚氰胺-尿素-甲醛树脂浸渍改性对杉木压缩吸能特性的影响
Effect of Melamine-Urea-Formaldehyde Resin Impregnation on Compressive Energy Absorption Properties of Chinese Fir Wood
摘要
Abstract
In this study,Chinese fir wood was impregnated with melamine-urea-formaldehyde(MUF)resin solution with an 8%ratio,and then the quasi-static large deformation compression tests were conducted to investigate its compressive failure modes,mechanical properties,and energy absorption performance.The results were as follows:The weight percent gain of the modified wood reached 33.22%,and its anti-swelling efficiency attained 64.44%,indicating improved dimensional stability.The modification had no significant effect on the wood compression failure modes.The longitudinal failure mainly involved fiber buckling and tearing,the radial failure mainly involved layer-by-layer crushing of earlywood and latewood,while the tangential compressed wood was mostly matchstick damage.The compressive modulus of elasticity and crushing strength in modified specimen increased.Their plane stresses risen greatly in the transverse compression but decreased slightly in the longitudinal compression,and their densification strains decreased.The difference in compressive mechanical properties between longitudinal and transverse directions was reduced.The energy absorption per unit volume in the radial and tangential directions of the modified wood increased by 30%and 17%respectively,owever,both the longitudinal compression energy absorption and the maximum energy absorption efficiency decreased significantly.Low mass fraction MUF resin modification can significantly improve the dimensional stability of Chinese fir wood and reduce its energy absorption differences between longitudinal and transverse compression.关键词
杉木/三聚氰胺-尿素-甲醛树脂/准静态大变形压缩/破坏模式/吸能特性Key words
Chinese fir wood/melamine-urea-formaldehyde resin(MUF)/quasi-static large deformation compression/failure modes/energy absorption properties分类
农业科技引用本文复制引用
徐诗雨,胡极航,孔静,杨志一,吕文华..三聚氰胺-尿素-甲醛树脂浸渍改性对杉木压缩吸能特性的影响[J].木材科学与技术,2024,38(3):33-39,55,8.基金项目
中央级公益性科研院所基本科研业务费专项资金"减震木材的压缩吸能特性及其影响因素研究"(CAFYBB2022MA001) （CAFYBB2022MA001）
国家自然科学基金项目"木材分级多孔构造的压缩响应及能量耗散机制研究"(32371805). （32371805）
