毛竹材微纤丝角变异规律研究

Research on variation of microfibril angle in Phyllostachys pubescens

利用了X射线衍射技术对不同高度、不同竹龄、在垂周方向不同位置的毛竹材微纤丝角变化规律进行了研究。结果表明,在竹壁径向上,由外而内,微纤丝角大致呈先增大后减小的变化趋势,至靠近竹黄处微纤丝呈现最小值,且最大值与最小值间差异为4.17°。从基部往上,微纤丝角有略微增大,最大差异只有0.15°。毛竹材的微纤丝角从0.5年至6年呈先增大后减小的变化趋势,5个竹龄的毛竹材微纤丝角之间的差异最大值仅0.52°。最后通过方差分析表明,高度、竹龄以及垂周方向上的位置对毛竹材微纤丝角的影响显著。

Variations of microfibril angle of Phyllostachys pubescens with different heights,ages,radial posi-tions were studied by X-ray diffraction technique.The results showed that microfibril angle increased first,and decreased from outside to inside in radial direction of the walls,finally it reached to the minimum at the inside of the walls.The difference between the maximum and minimum values of microfibril angle was less than 4.17 °.Moreover,the microfibril angel increased slightly from base to top of the stalks.The difference was less than 0.15°.In addition,the microfibril angle increased first,then decreased from 0.5-year to 6-year,whose difference was less than 0.52°.At last,significant different effects of the microfibril angle with different ages,heights and radial positions of Phyllostachys pubescens were showed by analysis of variation.