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요약정보
竹节对集成材胶合性能的影响 / Influence of node on the bonding properties of glued laminated bamboo
Resource Type
Academic Journal
Authors
李振瑞
;
初石民
;
秦理哲
;
林兰英
;
LI Zhenrui
;
CHU Shimin
;
QIN Lizhe
;
LIN Lanying
Source
林业工程学报 / Journal of Forestry Engineering
. 7(6):80-85
Subject
竹节
集成材
胶合性能
理化性质
解剖构造
Language
Chinese
ISSN
2096-1359
Online Access
Scopus
Find it @ DONGA
초록
竹节的分布规律使其在竹集成材生产过程中成为不可忽视的重要部位,对产品的胶合性能会产生一定的影响.为探讨竹节对竹集成材产品胶合性能的影响机制,选用毛竹(Phyllostachys)为试验对象、竹节组坯方式为变量因子,对比3种竹节组坯方式("竹节-竹节""竹节-节间"和"节间-节间")胶合试样的剪切强度和木破率,主要从竹节的理化性质(密度、热水抽提物含量、pH)和解剖构造两方面分析其对胶合性能的影响.结果表明,竹节的存在能够显著提高竹集成材的胶合性能.从理化性质角度分析,竹节中热水抽提物含量低于节间,表面极性较弱,竹节与节间的pH基本一致,对胶黏剂固化时间的影响差异不明显,因此其化学特性不是竹节胶合性能优于节间的主要原因.竹节密度大于节间,是竹节胶合性能较优的主要原因之一.从解剖构造角度分析,除裸露在胶合表面的基本组织薄壁细胞和纤维细胞外,胶黏剂还可以通过竹节特有的横向维管束渗透进入竹材内部组织中,竹节较优的渗透性能是其胶合性能优于节间的重要原因.
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