不同部位龙竹材的润湿性和渗透性研究

Study on Wettability and Permeability of Different Parts of Dendrocalamus giganteus

【目的】拓展可利用竹材资源。【方法】通过测定龙竹(Dendrocalamus giganteus)竹材接触角和体积渗透量,借助AFM和光学显微镜对龙竹不同横向部位(竹青、竹肉和竹黄)及不同纵向部位(根、中、梢)的表面润湿性和整体渗透性进行了研究,为龙竹的合理利用提供理论依据。【结果】去除竹青竹黄后的试件整体渗透性提高约10%,表面润湿性提高约30%;不同纵向部位整体渗透性和表面润湿性都呈现出根部>梢部>中部的趋势,平均根部高出中部约23%,高出梢部约12%。【结论】龙竹适合作为原材料制备工程竹材运用于生物质建材。

【Objective】In order to expand the available bamboo resources.【Method】The surface wettability and overall permeability of different horizontal parts(bamboo green,bamboo flesh and bamboo yellow)and different longitudinal parts(root,middle and tip)of Dendrocalamus giganteus were studied by measuring the contact angle and volume permeability of D.giganteus timber with the aid of AFM and optical microscopy,providing a theoretical basis for the rational use of D.giganteus.【Result】The results showed that the overall permeability of the specimens after the removal of bamboo green and bamboo yellow increased by about 10%and the surface wettability increased by about 30%;the overall permeability and surface wettability of different longitudinal parts showed a trend of root>tip>middle,with the root being on an average of about 23%higher than the middle and 12%higher than the tip respectively.【Conclusion】The above data leads to the conclusion that D.giganteus,as a raw material,is suitable for the preparation of bamboo engineering materials for biomass construction.