[1]郑超,肖建平*. 劈裂率对定向结构麦秸板物理力学性能的影响[J].西北林学院学报,2014,29(05):191-194.[doi:doi:10.3969/j.issn.1001-7461.2014.05.36]
　ZHENG Chao,XIAO Jian-ping*. Effects of Splitting Rate on the Physicomechanical Properties of Oriented Structural Straw Board[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2014,29(05):191-194.[doi:doi:10.3969/j.issn.1001-7461.2014.05.36]
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 劈裂率对定向结构麦秸板物理力学性能的影响()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第29卷
期数:
2014年05期
页码:
191-194
栏目:
出版日期:
2014-09-30

文章信息/Info

Title:
 Effects of Splitting Rate on the Physicomechanical Properties of Oriented Structural Straw Board
文章编号:
1001-7461(2014)05-0191-04
作者:
 郑超; 肖建平*
 （西北农林科技大学 机械与电子工程学院，陕西 杨陵 712100）
Author(s):
 ZHENG Chao; XIAO Jian-ping*
 (College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China)
关键词:
 ; 麦秸; 劈裂; 定向结构麦秸板; 物理力学性能
Keywords:
 ; wheat straw;  splitting;  oriented structural straw board;  physicomechanical property
分类号:
S781.3
DOI:
doi:10.3969/j.issn.1001-7461.2014.05.36
文献标志码:
A
摘要:
 通过比较4种不同劈裂率（100%、90%、70%、50%）的原料压制定向结构麦秸板，探究劈裂率对板材主要物理力学性能的影响。结果表明：随着劈裂率的降低，平行向的抗弯强度与抗弯弹性模量呈增大趋势，当劈裂率为50%，平行向的抗弯强度为59.38 MPa，比劈裂率100%时（51.75 MPa）提高了15%；平行向的抗弯弹性模量为6.65 GPa，比劈裂率100%时（5.40 GPa）提高了23%。垂直方向的抗弯强度与抗弯强度模量差异不显著。劈裂率100%、90%、70%间内结合强度差异不显著，劈裂率为50%时，内结合强度显著下降，50%劈裂率时的内结合强度为0.31 MPa，比劈裂率100%时（0.36 MPa）下降了14%。随着劈裂率的降低，2 h吸水厚度膨胀率和24 h吸水厚度膨胀率呈增大趋势，24 h吸水率差异不显著。劈裂率50%时的2 h吸水厚度膨胀率为5.46%，约为劈裂率100%时（1.80%）的3倍，24 h吸水厚度膨胀率为17.97%，为劈裂率100%（10.83%）的1.7倍。
Abstract:
 Oriented structural straw boards were prepared by using wheat straws with four (100%, 90%, 70%, and 50%) different splitting rates (SR) to examine the SR on physicomechanical properties of the board. The results demonstrated that with the decrease of SR, parallel-aligned bending strength (PBS) and bending modulus (PBM) tended to increase. For example, when SR was 50%, PBS was 59.38 Mpa, 15% higher than that of 100% SR, the PBM was 6.65 Mpa, 23% higher than that of 100% SR. The bending strength and bending modulus in vertical direction were not significantly different among different splitting rates. The differences in internal bonding strength (IBS) among the splitting rates of 100%, 90%, and 70% were not significant. However, with 50% SR, IBS significantly decreased. For example, IBS was 0.31 Mpa with 50% SR, 14% lower than that of 100% SR. Two-hour and 24 h thickness swelling rates (TSR) increased along with the decrease of SR, and the differences in 24 h TSR among different SRs were not significant. For example, with 50% SR, 2 h TSR was 5.46%, 3 times higher than that of 100% SR, and 24 h TSR was 17.97%, 1.7 times higher than that of 100% SR.

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备注/Memo

备注/Memo:
 收稿日期：2013-11-29修回日期：2013-12-22
基金项目：西北农林科技大学基本科研业务费科技创新专项重点项目（QN2011071）。
作者简介：郑超，男，硕士研究生，研究方向：木材加工新技术。E-mail:646869286@qq.com
*通信作者：肖建平，男，讲师，研究方向：木材切削原理及木工机械。E-mail:243488105@qq.com
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