热压压力及板材密度对竹木复合层积材顺纹抗压强度的影响  

Influence of Hot-pressing Press and Board Density on Compressive Strength of Bamboo-wood Composite Laminated Veneer Lumber

作　　者：张晓春[1] 朱芋锭[2] 姚迟强[1] 李延军[1] 张齐生[1] 

机构地区：[1]浙江农林大学工程学院,杭州临安311300 [2]南京林业大学,南京210037

出　　处：《竹子研究汇刊》2012年第3期23-27,共5页Journal of Bamboo Research

基　　金：浙江省科技厅优先主题重点农业项目(2010c12021);教育部科学技术研究重点项目(201090)

摘　　要：通过单因变量两因素重复试验,以毛竹竹篾和桦木单板为原料,使用酚醛树脂胶黏剂压制竹木复合层积材,分析热压压力及板材密度对竹木复合层积材顺纹抗压强度的影响,并利用扫描电子显微镜对竹木复合层积材的微观构造进行了观察。结果表明,在试验选定因素水平范围内,热压压力和板材密度对竹木复合层积材顺纹抗压强度影响显著,板材顺纹抗压强度随热压压力的升高先增大而后减小,且各水平间差异显著;不同密度对板材顺纹抗压强度的影响差异显著,板材的顺纹抗压强度随板材密度的增大而增大;在其他工艺参数相对不变的情况下,热压压力与板材密度的交互作用对板材顺纹抗压强度的影响并无显著的影响。扫描电镜照片显示,热压压力升至一定水平,板材内部结构受到一定程度的损伤。Two-factor experiments were carried out to study the effects of hot-pressing pressure and board density on compressive strength of bamboo-wood composite LVL.And the microscopic structure of the boards was observed by scanning electron microscopy.The tested boards were made from bamboo strips near bamboo green and birch veneers using phenol-formaldehyde adhesive.The results showed that the compressive strength parallel to the grain was first enhanced and then reduced significantly with the rise of hot-pressing pressure,and was significantly enhanced with the rise of board density.The interaction of hot-pressing pressure and board density had no significant effect on the compressive strength parallel to the grain.Scanning electron micrographs showed that the board internal structure was damaged in a certain degree when the hot-pressing pressure rose to a certain level.

关 键 词：热压压力 板材密度 竹木复合层积材 抗压强度 

分 类 号：TS653[轻工技术与工程]