[1]苑一丹,朱玲燕,宋孝周*. 栓皮栎软木细胞结构与主要特性[J].西北林学院学报,2017,32(3):216-220.[doi:10.3969/j.issn.1001-7461.2017.03.40]
　YUAN Yi-dan,ZHU Ling-yan,SONG Xiao-zhou*. Cellular Structure and Principal Characteristics of the Cork from Quercus variabilis[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2017,32(3):216-220.[doi:10.3969/j.issn.1001-7461.2017.03.40]
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 栓皮栎软木细胞结构与主要特性()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第32卷
期数:
2017年第3期
页码:
216-220
栏目:
出版日期:
2017-05-31

文章信息/Info

Title:
 Cellular Structure and Principal Characteristics of the Cork from Quercus variabilis
文章编号:
1001-7461(2017)03-0216-05
作者:
 苑一丹; 朱玲燕; 宋孝周*
 （西北农林科技大学 林学院，陕西 杨陵 712100）
Author(s):
YUAN Yi-dan; ZHU Ling-yan; SONG Xiao-zhou*
 (College of Forestry,Northwest A&F University,Yangling,Shaanxi 712100,China)
关键词:
 ; 栓皮栎; 软木; 细胞结构; 物理性能; 化学组成
Keywords:
 ; Quercus variabilis;  cork;  cellular structure;  physical property;  chemical composition
分类号:
S792.18
DOI:
10.3969/j.issn.1001-7461.2017.03.40
文献标志码:
A
摘要:
 以秦巴山区栓皮栎软木为原料，对其细胞结构、基本物理特性及化学组成进行研究，以期为栓皮栎软木的预处理及高附加值的应用提供基础数据。通过场发射扫描电镜观察软木的微观结构，利用图像分析软件（Image-Pro Plus 6.0）测量软木细胞的特征参数；按照国家和行业相关标准测量栓皮栎软木的主要物理性能指标和化学组成。结果表明，栓皮栎初生和再生软木细胞是沿树径向排列紧密的薄壁细胞，无细胞间隙，细胞壁均存在明显褶皱，在横切面上，初生和再生栓皮栎的早软木细胞壁平均厚度分别为1.10 μm和1.02 μm，晚软木的细胞壁平均厚度分别为1.52 μm和1.99 μm；在试验范围内，初生和再生软木的厚度测量值范围分别为6.00～18.92 mm和8.55～23.07 m，皮层厚度测量值范围分别为0.31～2.21 mm和0.42～1.59 mm，密度分别为0.197～0.355 g·cm-3和0.198～0.344 g·cm-3。解除压力15 min后，初生和再生栓皮栎软木的径向压缩回弹率均值分别为83.16%和85.86%，解除压力24 h后的径向压缩回弹率均值分别为88.42%和90.82%；初生和再生栓皮栎软木的主要化学成分有抽提物、软木脂、酸不溶木质素、综纤维素和灰分，其质量分数分别为12.79%和11.52%、36.34%和40.41%、20.12%和18.40%、18.29%和21.75%、2.44%和1.08%，软木脂是栓皮栎软木细胞壁的主要成分。再生软木的主要物理特性总体上优于初生软木，两者化学组成含量的差异是其物理性能差异的主要原因之一。
Abstract:
 In order to provide basic data for the pretreatment and high value-added applications of the cork from Quercus variabilis,the cork cell structure,physical properties and chemical composition were studied.The microscopic structures were observed with the field emission scanning electron microscopy and the characteristic parameters of cork cells were analyzed with the software of Image-Pro Plus 6.0.The main physical property parameters and chemical composition were measured based on relevant national and industrial standards and literatures.The results showed that the virgin and reproduction cork cells were a homogeneous tissue of thin-walled cells.The cells,as an irregular polyhedral packed in columns parallel to the radial direction of the tree,were structurally arranged without intercellular voids.The corrugation was obvious on the virgin and reproduction cork cell walls.On average,in the transverse section,the cell wall thickness of earlycork of virgin and reproduction cork was 1.10 μm and 1.02 μm,and the cell wall thickness of latecork was 1.52 μm and 1.99 μm,respectively.Within the scope of the test,the thickness ranges of virgin and reproduction cork were 6.00-18.92 mm and 8.55-23.07 mm,respectively.The thickness ranges of annual ring of the virgin and reproduction cork were 0.31-2.21 mm and 0.42-1.59 mm.The density ranges were 0.197-0.355 g·cm-3 and 0.198-0.344 g·cm-3.On average,the radial compression resilience ration of virgin and reproduction cork after pressure relief 15 min were 83.16% and 85.86%,and after pressure relief 24 h were 88.42% and 90.82%,respectively.The chemical composition of virgin and reproduction cork were 12.79% and 11.52% extractives,36.34% and 40.41% suberin,20.12% and 18.40% acid-insoluble lignin,18.29% and 21.75% holocellulose,2.44% and 1.08% ash.The suberin was the main component of the Q.variabilis cork.In general,the main physical properties of reproduction cork were better than that of virgin cork.The difference in content of chemical composition was one of the main reasons of virgin and reproduction cork with different physical performance.

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备注/Memo

备注/Memo:
 收稿日期：2016-12-04修回日期：2017-01-17
基金项目：国家自然科学基金（31470583）。
作者简介：苑一丹，女，在读硕士，研究方向：栓皮栎软木物理特性。E-mail:258744185@qq.com
*通信作者：宋孝周，男，教授，研究方向：木材科学。E-mail:xzhsong@163.com
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