[1]李明月,陈东升,王雪玉,等. 节子的性质及其对木材材性的影响[J].西北林学院学报,2020,35(4):197-204.[doi:10.3969/j.issn.1001-7461.2020.04.31]
 LI Ming-yue,CHEN Dong-sheng,WANG Xue-yu,et al. Nature of the Knot and Its Impact on Wood Properties[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2020,35(4):197-204.[doi:10.3969/j.issn.1001-7461.2020.04.31]
点击复制

 节子的性质及其对木材材性的影响()
分享到:

《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第35卷
期数:
2020年第4期
页码:
197-204
栏目:
出版日期:
2020-09-29

文章信息/Info

Title:
 Nature of the Knot and Its Impact on Wood Properties
文章编号:
1001-7461(2020)04-0197-08
作者:
 李明月1陈东升2王雪玉1任海青1*
 (1.中国林业科学研究院 木材工业研究所,北京 100091;2.中国林业科学研究院 林业研究所,北京 100091)
Author(s):
 LI Ming-yue1CHEN Dong-sheng2WANG Xue-yu1REN Hai-qing1*
 (1.Research Institute of Wood Industry,CAF,Beijing 100091,China;2.Institute of Forestry,CAF,Beijing 100091,China)
关键词:
 节子构造木材材性节子检测
Keywords:
 knots structure wood properties knots detection methods
分类号:
S781.5
DOI:
10.3969/j.issn.1001-7461.2020.04.31
文献标志码:
A
摘要:
 树节是指树干内部的枝条基部或枯死枝条形成的结疤,在用材中称为节子。在树木生长过程中节子独特的理化性能对树木的生长有良好的作用。但是在木材加工利用过程中节子的存在严重影响木材性能和加工利用。本研究对节子的构造、物理力学性质、化学性质和检测方法等5个方面研究现状进行了总结。节子的存在对于树木的生长过程中枝条与树干之间最佳连接方式,无论在应力作用还是外部细菌等因素的影响下,节子在树木生长过程中所体现的物理性能和化学性能都有着良好的作用。但是在木材的利用中,节子对于木材力学性能和加工性能的影响巨大,不仅对于刀具损伤较大,在一定程度上降低木材的抗拉、抗压、抗弯性能,同时对于木结构连接部位的力学性能也有一定影响。目前国内外对于板材节子检测的研究较充分,但是对于原木的节子检测研究较少。在有节材力学性能预测方向,得到了较为精准的预测模型。并且通过节子特征、林木密度、树龄、树干特征等对节子进行预测,帮助在树木生长过程中对木材进行改良。现阶段对节子的研究主要集中在力学性能和检测等方向,对于节子部位的超微观构造和构造智能性利用等方面相对薄弱,对于节子如何影响木材力学性能的机理并未深入。
Abstract:
 Branch knot,which is called knot when it is in timber,refers the base of the branch within the trunk or the left branch base after the branch is removed from the trunk.In tree growth,the unique physical and chemical properties of knot have a good effect on the growth of trees.However,in wood processing and utilization,the existence of knot seriously affects the wood properties and processing and utilization of wood.In this paper,the research status of knot was summarized from five aspects:knot structure,physical and mechanical properties,chemical properties,and detection methods.The existence of knot plays very beneficial roles in the best connection between tree trunk and branches and in tree growth,no matter under the influence of stress or external bacteria and other factors.However,in the use of timber,knot presents huge negative impacts on wood mechanical properties and processing properties.It causes great damage to the wood processing tools,reduces the tensile,compressive,bending properties of wood to a certain extent.In addition,it also imposes destructive effects on mechanical properties of the wood structure connection parts.At present,there are many researches on the detection of plank knot at home and abroad,but few on the detection of log knot.In the aspect of predicting mechanical properties of the woods with knots,some more accurate models were obtained.The knots can be predicted by their characteristics,tree density,tree age and trunk characteristics,so as to improve the wood quality during tree growth.The current knot research interests mainly focused on wood mechanical properties and knot detection.Few are on knot supermicroscopic structure and utilization of structural intelligence,as well as the mechanism that how knot affects wood mechanical properties.

相似文献/References:

[1]李亚藏,梁彦兰,王庆成. 铅对山梨和山荆子光合作用和叶绿素荧光特性的影响[J].西北林学院学报,2012,27(05):21.
 LI Ya-cang,LIANG Yan-lan,WANG Qing-cheng. Influence of Pb on Photosynthesis and Chlorophyll Fluorescence Characteristics in Pyrus ussuriensis and Malus baccata [J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2012,27(4):21.
[2]张小咏,李佳,杨艳昭,等. 基于SWAT模型的长江源区径流模拟[J].西北林学院学报,2012,27(05):38.
 ZHANG Xiao-yong,LI Jia,YANG Yan-zhao,et al. Runoff Simulation of the Catchment of the Headwaters of the Yangtze River Based on SWAT Model[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2012,27(4):38.
[3]杨红旗,陈广辉,王金林. PVAc改性酚醛树脂制备铝木复合材料研究[J].西北林学院学报,2013,28(01):170.[doi:10.3969/j.issn.1001-7461.2013.01.34]
 YANG Hong-qi,CHEN Guang-hui,WANG Jin-lin. PF Adhesive Modified by PVAc for Manufacturing Technology of Decorative Fiberboard with Aluminum Foils[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2013,28(4):170.[doi:10.3969/j.issn.1001-7461.2013.01.34]
[4]江涛,李秀荣,谢延军,等. 微波预处理对巨尾桉木材渗透性的影响[J].西北林学院学报,2013,28(01):174.[doi:10.3969/j.issn.1001-7461.2013.01.35]
 JIANG Tao,LI Xiu-rong,XIE Yan-jun,et al. Effects of Microwave Pretreatment on the Permeability of Eucalyptus grandis×Eucalyptus urophylla[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2013,28(4):174.[doi:10.3969/j.issn.1001-7461.2013.01.35]
[5]牛晓霆,王逢瑚,曹新民. 明清家具匠师原木下料的工艺原则及措施[J].西北林学院学报,2013,28(01):178.[doi:10.3969/j.issn.1001-7461.2013.01.36]
 NIU Xiao-ting,WANG Feng-hu,CAO Xin-min. Techniques and Principles of Log Cuttings of Furniture Makers in Ming and Qing Dynasties[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2013,28(4):178.[doi:10.3969/j.issn.1001-7461.2013.01.36]
[6]吕金阳,覃卓凯,舒辉,等. 银杉木材构造美学价值[J].西北林学院学报,2013,28(01):183.[doi:10.3969/j.issn.1001-7461.2013.01.37]
 LV Jin-yang,QIN Zhuo-kai,SHU Hui,et al. Esthetical Values in Wood Structure of Cathaya argyrophylla[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2013,28(4):183.[doi:10.3969/j.issn.1001-7461.2013.01.37]
[7]杨艳红,张海敏,孙景荣. 基于传统文化视角的现代家具设计探析[J].西北林学院学报,2013,28(01):188.[doi:10.3969/j.issn.1001-7461.2013.01.38]
 YANG Yan-hong,ZHANG Hai-min,SUN Jing-rong. Study of Modern Furniture Design Based on Traditional Culture[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2013,28(4):188.[doi:10.3969/j.issn.1001-7461.2013.01.38]
[8]黄圣游,叶喜. 新中式家具“中式”传统的界定[J].西北林学院学报,2013,28(01):192.[doi:10.3969/j.issn.1001-7461.2013.01.39]
 HUANG Sheng-You,YE Xi. Definition of Traditional Element in New Chinese Style Furniture[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2013,28(4):192.[doi:10.3969/j.issn.1001-7461.2013.01.39]
[9]韩维生,赵明磊,王宏斌. 基于阈限理论的设计尺度体系[J].西北林学院学报,2013,28(01):197.[doi:10.3969/j.issn.1001-7461.2013.01.40]
 HAN Wei-sheng,ZHAO Ming-lei,WANG Hong-bin. Design Scale System Based on Threshold Theory[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2013,28(4):197.[doi:10.3969/j.issn.1001-7461.2013.01.40]
[10]宋杰,侯建军,申黎明. 按摩椅按摩头包覆层对按摩舒适性的影响[J].西北林学院学报,2013,28(01):202.[doi:10.3969/j.issn.1001-7461.2013.01.41]
 SONG Jie,HOU Jian-jun,SHEN Li-ming. Influence of Massager Coat Layer of Massage Chairs on the Degree of Comfort[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2013,28(4):202.[doi:10.3969/j.issn.1001-7461.2013.01.41]

备注/Memo

备注/Memo:
 收稿日期:2019-09-26修回日期:2019-11-18
基金项目:中央级公益性科研院所基本科研业务费专项。
作者简介:李明月。研究方向:木材力学与木结构。E-mail:990372396@qq.com
*通信作者:任海青,博士,研究员,博士生导师。研究方向:木材力学与木结构。E-mail:renhq@caf.ac.cn
更新日期/Last Update: