文献类型：期刊文献

中文题名：辐射松重组木密度对其孔隙率和性能的影响

英文题名：Effect of density on porosity and physical-mechanical properties of highperformance scrimbers

作者：魏金光[1] 韦亚南[1] 鲍敏振[1] 张亚慧[1] 余养伦[1] 李长贵[2] 于文吉[1]

第一作者：魏金光

机构：[1]中国林业科学研究院木材工业研究所国家林业局木材科学与技术重点实验室;[2]山东省林业科学研究院

年份：2018

卷号：35

期号：3

起止页码：519-523

中文期刊名：浙江农林大学学报

外文期刊名：Journal of Zhejiang A & F University

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD2017_2018】；

基金：山东省泰山产业领军人才工程高效生态农业创新类项目(LJNY201602)

语种：中文

中文关键词：木材科学与技术;重组木;密度;孔隙率;物理力学性能;辐射松

外文关键词：wood science and technology;scrimber;density;porosity;physical-mechanical properties;Pinusracliata

分类号：S781.6

摘要：为高值化利用人工林速生材辐射松Pinus radiata,采用高性能重组木制造技术,制备了不同密度的辐射松重组木,并探讨了密度对其孔隙率、耐水性以及力学强度的影响规律。结果表明:辐射松素材的孔隙率约为68.00%;重组木的孔隙率随密度增大呈线性下降,低至2.11%。随密度增大,重组木的耐水性和力学强度均呈升高趋势;当密度从0.80 g·cm^(-3)增加到1.39 g·cm^(-3),吸水厚度膨胀率和吸水率分别下降了21.55%和76.88%,弹性模量和水平剪切强度分别提高了116.47%和86.29%。
For value-added utilization with fast-growing wood of Pinus radiata as well as promotion of added value of the products, outdoor serimbers with varying densities were prepared with P. radiata as the raw material via the manufacturing technology of high-performance reconstituted wood. Then, effect of density on porosity, water resistance, and mechanical strength of the obtained serimbers was determined. Results showed that the porosity of air-dry logs was 68.00%, Also, serimber porosity decreased as density increased and the minimum was 2.11%, Both water resistance and mechanical strength were trengthened with an increase in density. When the density increased from 0.80 to 1,39 g·cm^-3, thickness swelling rate （TSR） decreased 21.55% and water ab- sorption rate （WAR） decreased 76.88%; whereas, modulus of rupture （MOR） increased 116.47% and horizon-tal shear strength （HSS） increased 86.29%. It suggested that the density of P. radiata scrimbers had a big impact on porosity and physical-mechanical properties.