文献类型：期刊文献

中文题名：三聚氰胺-尿素-乙二醛树脂改性对橡胶木物理力学性能的影响

英文题名：Effect of Melamine-Urea-Glyoxal Resin on Physical and Mechanical Properties of Rubberwood

作者：平立娟[1] 孙柏玲[1] 邵亮亮[2] 柴宇博[1] 刘君良[1]

第一作者：平立娟

机构：[1]中国林业科学研究院木材工业研究所,北京100091;[2]北京林大林业科技股份有限公司,北京100083

年份：2021

卷号：35

期号：6

起止页码：38-43

中文期刊名：木材科学与技术

外文期刊名：Chinese Journal of Wood Science and Technology

收录：CSTPCD;;北大核心:【北大核心2020】；

基金：中国林业科学研究院基本科研业务费专项资金项目“橡胶木多效防护关键技术”(CAFYBB2017ZX003-04)。

语种：中文

中文关键词：三聚氰胺-尿素-乙二醛树脂;橡胶木改性;微观结构;物理力学性能;

外文关键词：melamine-urea-glyoxal resin;rubberwood modification;microstructure;physical and mechanical properties;

分类号：S781.7;TS62

摘要：采用三聚氰胺、尿素和乙二醛合成一种环保型三聚氰胺-尿素-乙二醛(MUG)树脂,并以6种质量分数(5%、15%、25%、35%、45%、55%)浸渍处理橡胶木,通过加热聚合,在木材内部形成固体疏水树脂。试验结果表明,随着树脂质量分数的增加,改性材的增重率和密度均增大,吸水率和浸出率减小,抗胀缩率先增大后减小。SEM-EDX分析表明,MUG树脂分布在改性材的细胞腔和细胞壁中。与未改性对照试材相比,25%MUG树脂改性材的抗弯强度和弹性模量分别增大了19.9%、14.3%,顺纹抗压强度增大了19.2%。经MUG树脂改性后,橡胶木的尺寸稳定性等物理性能和抗弯强度等力学性能均明显提高。
In the study,a green and environment-friendly melamine-urea-glyoxal(MUG)resin was synthesized by mixing melamine,urea,glyoxal,and additive for upgrading low-quality rubberwood.Wood/MUG samples were prepared with six different MUG resin concentrations(5%,15%,25%,35%,45%,and 55%)into the wood matrix,and then heated and polymerized to form a solid and hydrophobic resin in the wood.The physical and mechanical properties of the modified woods were evaluated.The results showed that as the resin concentration increasing,the weight percent gain and density of modified wood samples increased,water uptake and leachability decreased,and the anti-swelling efficiency increased at first and then decreased.SEM-EDX analysis showed that the MUG resin was widely distributed in the cell lumens and cell walls.Modulus of rupture(MOR)and modulus of elasticity of 25%MUG resin treated wood samples were increased by 19.9%and 14.3%,respectively,comparing with untreated control samples.Compression strength parallel to the grain of the treated wood samples was increased by 19.2%than that of control samples.In conclusion,MUG resin was successfully deposited on the cell walls of rubberwood,and the water uptake of treated wood samples was decreased,and the physical and mechanical properties of rubberwood were improved.