表板热处理温度对展平竹—杨木复合板物理力学性能的影响  

Effect of Heat Treatment Temperature of Surface Plate on Physical and Mechanical Properties of Flatten-Bamboo-Poplar Veneer Composite Board

作　　者：韩佳 黄纯 杨宇涵 梁琦淞 王雪花[1] HAN Jia;HUANG Chun;YANG Yu-han;LIANG Qi-song;WANG Xue-hua(Nanjing Forestry University,Nanjing 210037,Jiangsu,China)

机构地区：[1]南京林业大学,江苏南京210037

出　　处：《竹子学报》2023年第1期30-37,共8页Journal of Bamboo Research

基　　金：江苏省高等学校大学生创新创业训练计划项目(202110298165H);国家自然科学基金项目(31800471)。

摘　　要：【目的】充分发挥杨木与竹展平板各自的性能优势。【方法】以不同温度(120℃、140℃、160℃,0 MPa处理2 h)热处理的竹展平板为表板,杨木单板为芯板顺纹组坯制作展平竹—杨木复合板,通过测试其含水率、色差、光泽度、胶合强度、浸渍剥离率、抗弯强度、抗弯弹性模量等性能,分析表板热处理对复合板材物理力学性能的影响。【结果】物理性质方面,表板热处理使得复合板含水率大幅度降低;光泽度逐渐减小,色觉稳定性增大;总色差皆大于1.5,但材色变化不明显;胶合性质方面,表板热处理使得复合板胶合强度下降,140℃处理时达最低值;浸渍剥离试验表明,表板热处理使得复合板胶合耐久性先增强后减弱;力学性质方面,随表板热处理温度的升高,弹性模量、抗弯强度均有一定提高,140℃处理时达最大值。【结论】表板热处理丰富了展平竹—杨木复合板的视觉效果,改善了复合板的抗弯强度、弹性模量,但对复合板的胶合性能具有一定的不利影响,实际使用中应根据具体需求进行选择。【Objective】The purpose of this paper is to give full play to the performance advantages of poplar and bamboo exhibition plate.【Method】In this study,bamboo exhibition plate with different temperature heat treatment(120℃,140℃,160℃,0 MPa for 2 h)was used as surface plate and poplar veneer as core board to make flatten-bamboo-poplar veneer composite board which was made up by assemble patterns of parallel texture.The properties of flatten-bamboo-poplar veneer composite board such as equilibrium moisture content,color difference,gloss,bonding strength,dipping peeling rate,bending strength,modulus of elasticity and so on were tested,and the effects of different temperature treatment of the surface plate on the physical and mechanical properties of the composite board were analyzed.【Result】The results showed that,in terms of physical properties,with the increase of heat treatment temperature of the surface plate,the equilibrium moisture content of the composite board decreased significantly.The gloss of the composite board decreased gradually,and the color perception stability increased.The total color difference was greater than 1.5,but the color change was not obvious.In terms of gluing properties,the heat treatment of the surface plate reduced the bonding strength of the composite board,reaching the lowest value at 140℃.Immersion peeling test showed that the bonding durability of the composite board was first strengthened and then weakened with the increase of temperature.In terms of mechanical properties,the modulus of elasticity and bending strength increased with the increase of heat treatment temperature of the surface plate,and reached the maximum value at 140℃.【Conclusion】The heat treatment of surface plate enriches the visual effect of the flatten-bamboo-poplar veneer composite board,improves the bending strength and modulus of elasticity of the composite board,but has a certain adverse effect on the bonding performance of the composite board.In actual use,it should be selected accord

关 键 词：展平竹—杨木复合板 表板热处理 处理温度 物理力学性能 胶合强度 

分 类 号：TS653[轻工技术与工程]