东北林业大学学报
東北林業大學學報
동북임업대학학보
JOURNAL OF NORTHEAST FORESTRY UNIVERSITY
2013年
10期
86-90
,共5页
愈伤木%正常木%化学组成%物理力学性质%构造
愈傷木%正常木%化學組成%物理力學性質%構造
유상목%정상목%화학조성%물리역학성질%구조
Callus wood%Normal wood%Chemical composition%Physico-mechanical property%Structure
以黄山松、悬铃木的愈伤木及其附近的正常木为研究对象,采用X射线法测定了结晶度,同时比较分析了其主要化学成分(纤维素和木质素质量分数)、物理力学性质(基本密度、顺纹抗压强度)及部分解剖性质的差异,研究了顺纹抗压强度与主要化学成分、基本密度和结晶度之间的相关性。结果表明:黄山松和悬铃木愈伤木的结晶度、纤维素和木质素质量分数、基本密度、顺纹抗压强度均比正常木的大,差异显著,而且纤维/管胞细胞壁厚、直径大、纤维短,总体表明愈伤木的材性指标比正常木高;黄山松和悬铃木愈伤木与正常木的部分指标相差不是十分明显,但愈伤木在整个结构中起增强作用,表明这一增强机制是由愈伤木的构造贡献的。
以黃山鬆、懸鈴木的愈傷木及其附近的正常木為研究對象,採用X射線法測定瞭結晶度,同時比較分析瞭其主要化學成分(纖維素和木質素質量分數)、物理力學性質(基本密度、順紋抗壓彊度)及部分解剖性質的差異,研究瞭順紋抗壓彊度與主要化學成分、基本密度和結晶度之間的相關性。結果錶明:黃山鬆和懸鈴木愈傷木的結晶度、纖維素和木質素質量分數、基本密度、順紋抗壓彊度均比正常木的大,差異顯著,而且纖維/管胞細胞壁厚、直徑大、纖維短,總體錶明愈傷木的材性指標比正常木高;黃山鬆和懸鈴木愈傷木與正常木的部分指標相差不是十分明顯,但愈傷木在整箇結構中起增彊作用,錶明這一增彊機製是由愈傷木的構造貢獻的。
이황산송、현령목적유상목급기부근적정상목위연구대상,채용X사선법측정료결정도,동시비교분석료기주요화학성분(섬유소화목질소질량분수)、물리역학성질(기본밀도、순문항압강도)급부분해부성질적차이,연구료순문항압강도여주요화학성분、기본밀도화결정도지간적상관성。결과표명:황산송화현령목유상목적결정도、섬유소화목질소질량분수、기본밀도、순문항압강도균비정상목적대,차이현저,이차섬유/관포세포벽후、직경대、섬유단,총체표명유상목적재성지표비정상목고;황산송화현령목유상목여정상목적부분지표상차불시십분명현,단유상목재정개결구중기증강작용,표명저일증강궤제시유유상목적구조공헌적。
With the callus wood and the surrounding normal wood of Pinus taiwanensis and Platanus acerifolia, we tested the cel-lulose crystallinity of the callus woods and the surrounding normal woodsby X-ray diffraction spectrum and studied the difference of the main chemical compositions ( cellulose and lignin content ) , physico-mechanical properties ( basic density and axial compression strength) and the anatomy properties.We also analyzed the correlations between the axial compres-sion strength and the main chemical compositions, basic density and cellulose crystallinity.The cellulose crystallinity, cel-lulose and lignin content, basic density and axial compression strength of the callus woods are higher than those of the sur-rounding normal woods with significant difference and the fibre/tracheid cell wall of callus woods is thicker.The larger di-ameter and the shorter length indicate that the wood property index of callus wood is higher than normal wood.The differ-ence between the indexes of the callus woods and the surrounding normal woods is not so significant , but the callus wood plays potential role in the whole structure.Therefore, the reinforcement mechanism is contributed by the callus wood struc-ture.