改性异氰酸酯施胶量及密度对麦秸刨花板性能的影响  

Effect of Modified Isocyanate Resin Content and Density on Properties of Wheat Straw Particleboard

作　　者：易顺民[1] 郝健[1] 晏晖[1] 张慧婧[1] 张彦华[1] 

机构地区：[1]东北林业大学材料科学与工程学院,黑龙江哈尔滨150040

出　　处：《西南林业大学学报（自然科学）》2013年第4期94-97,106,共5页Journal of Southwest Forestry University：Natural Sciences

基　　金：国家青年自然科学基金项目(31200442)资助;国家级大学生科技创新基金项目(201210225037)资助;黑龙江省青年科学基金项目(QC2011C055)资助

摘　　要：用改性异氰酸酯胶黏剂制备麦秸刨花板,考察施胶量和密度对板材物理力学性能和热稳定性能的影响。通过扫描电子显微镜(SEM)观察和热重分析(TGA)探讨其胶接断面和热稳定性,研究其物理力学性能提高的原因。结果表明,随着施胶量增大,各项物理性能指标均有改善,热稳定性降低;随着麦秸刨花板密度增大,各项物理性能指标得到明显提高,热稳定性也逐渐提高;综合考虑麦秸刨花板性能和成本,当施胶量为4%,密度为0.8 g/cm3时,各项指标均最优,物理性能完全满足国家标准要求。Modified isocyanate adhesive was used to prepare wheat straw particleboard, the influence of resin content and density on the physical and mechanical properties and thermal stability was studied. The thermal stabil- ity and the feature of glued joint section of wheat straw particleboard were analyzed by scanning electron microscopy （SEM） and thermal gravimeter analysis （TGA） so as to explore the mechanism how the physical and mechanical properties were improved. The results showed that the physical performance indexes were improved whereas the thermal stability was reduced along with the increases of resin content. Along with the density increment of the wheat straw particleboard, the physical properties were significantly improved, and the thermal stability was gradu- ally increased. Comprehensively considering the properties of wheat particleboard and the manufacture cost, it was proposed to set 4% as the resin dosage and 0. 8 g/era3 as the density by which technology the major properties of the wheat straw particleboard were optimal, and the physical performance could fully meet the requirements of the national standard.

关 键 词：麦秸刨花板 改性异氰酸酯 施胶量 密度 性能 

分 类 号：S784[农业科学—林学]