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随着人们生活水平的提高,有些人家常为盖房或制作家具而存放一些木材。存放不当,会出现裂缝、变形、腐朽、虫蛀等,造成不应有的浪费和损失。所以,家庭存放木材要注意下面几个问题。凡是新浅的树木,或是新买回来的木材,都不要立即剥掉树皮,也不要放在日光下暴晒,否则,会因木材中的水份蒸发过快而出现裂缝。科学的方法是,先放在防雨、通风的棚子里,经过半年时间再剥掉树皮,这样,木材就不会出现大的裂缝了。如果急等着用,则需想办法烘干。用作梁、檩、椽的木材,在使用前应用柴油涂 相似文献
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木材吸湿机理及其应用 总被引:1,自引:0,他引:1
木材是一种多孔性、吸湿性和各向异性的天然高分子材料,水分影响着木材多方面的性质。文中从木材组分的角度综述了木材对水分的吸湿机理,介绍了木材对水分吸附的基本理论,解释了木材吸湿滞后现象的基本原因;在上述基础上评述了降低木材吸湿性的基本方法及其实现原因,还分析了机理应用方面存在的不足以及测试方法的不统一,并对未来研究趋势进行了展望。 相似文献
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木材碳学是近年来兴起的一门科学, 其主要研究内容包括木材碳素的储存量、木材储能、人工林木材固碳增汇与优质木材培育技术及木质产品固碳延伸等方面。文中简述了木材碳学研究中木材固碳量与含碳率、木材固碳量的影响因素、木材固碳量与木材热值的关系以及木质材料固碳量和固碳延伸等方面的研究现状, 并对今后的研究方向进行了展望。 相似文献
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介绍了近年来木材防护业在木材防护剂、木材防护处理工艺及木材改性等方面所取得的主要成就;剖析了面临着来自于环境的担心、消费者的需求以及与其它产品的市场竞争等问题;最后对今后发展木材防护技术提出了一些想法. 相似文献
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压缩变形特征是压缩木研究的重要内容。文中针对木材湿热软化径向压缩变形,从压缩变形的影响因素、压缩变形位置对其力学性能的影响和压缩变形固定3个方面综述国内外研究进展,包括树种、生长轮构造和压缩工艺对木材压缩变形的影响,压缩变形位置对力学性能的影响,以及热处理对压缩变形的影响,指出木材湿热软化径向压缩研究中关于压缩变形需要继续解决的主要问题以及发展方向,以期为湿热软化径向压缩木材的进一步研究和应用提供参考。 相似文献
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Bilgin Guller 《Annals of Forest Science》2007,64(4):467-475
The purpose of this study was to determine the effects of plantation thinning on various wood properties of Pinus brutia Ten. Tree samples were obtained from heavily and moderately thinned and unthinned 33–35 year-old plantations. Wood properties were examined in various wood zones including 16 annual rings after the first treatment. The results of this study showed that there was a significant relationship between thinning intensity and radial increment (1.30 m) for an individual tree. Thinning treatments increased annual ring width especially a few years after thinning. Heavy thinning treatments were especially effective in impacting mean ring width values at breast height. However, the percentage of late wood did not differ much between the samples. Based on the results of correlation analysis between ring width and late wood percentage there was no significant correlation identified. Mean wood density was not affected by the treatments. Also, no significant correlation was found between thinning and examined strength properties (MOR, MOE and compression strength parallel to grain). However, a relationship was found between wood density and all strength properties except for MOE. The current results suggest that thinning can produce improvements in ring width without any negative impacts on investigated wood properties. It is recommended that subsequent studies should be designed to understand genetic effects and maximize treatment effects. 相似文献
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采用杉木和泡桐为试材,对经过KY-FW阻燃剂处理的木材与未经处理的木材进行对比研究,分析KY-FW阻燃剂对木材力学性能的影响.结果表明,木材经KY-FW阻燃剂处理后,除冲击韧性降低外,其它主要力学性能指标(如抗弯强度、顺纹抗压强度及硬度)都有所提高.KY-FW阻燃木材的力学性能达到了一级水基型阻燃剂标准规定的相应指标. 相似文献
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改善木塑复合材料界面相容性的途径 总被引:35,自引:0,他引:35
本文介绍了国内外在改善木塑复合材料的界面复合性能方面所采用的最新研究方法和取得的研究成果。几乎所有的研究都表明:在木塑复合过程中木材与热塑性高分子聚合物之间界面的粘合性能和作为填充物的木材在热塑性高分子聚合物基材中的分散性是影响木塑复合材料的物理、力学性能的主要因素。同时对如何改进木塑复合材料界面相容性的研究方法进行了系统的介绍。 相似文献
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Development of high-performance strand boards: engineering design and experimental investigations 总被引:1,自引:0,他引:1
Reinhard Stürzenbecher Karin Hofstetter Thomas Bogensperger Gerhard Schickhofer Josef Eberhardsteiner 《Wood Science and Technology》2010,44(1):13-29
Strand-based engineered wood products such as oriented strand boards enjoy great popularity in structural engineering and
are widely used for a variety of applications. To strengthen their competitiveness and to enlarge their range of utilization
particularly in the load-bearing sector, the mechanical properties of these products need to be improved. This motivated the
research efforts to use large-area, slender veneer strands for the production of strand boards with increased stiffness and
strength. Target-oriented development of these products requires comprehending the effects of the relevant (micro-)characteristics,
such as wood quality, strand geometry, and strand orientation and compaction during the production process, as well as layer
assembly and density profile, on the mechanical properties of the finished strand boards. Comprehensive test series, in which
these effects on tension, bending and shear properties of the boards have been studied individually, are presented in this
paper. The obtained results provided insight into the microstructural load-carrying mechanisms and, thus, yielded valuable
knowledge for product optimization and further improvement of custom-designed strand-based engineered wood products. 相似文献