毛竹纤维饱和点随竹龄的变化规律

Variation of the fiber saturation point of bamboo with age

竹材的纤维饱和点对于竹材的加工利用具有重要指导意义。以毛竹为研究对象,采用力学法和水分吸着等温线法对毛竹纤维饱和点及其随竹龄的变化规律进行了系统研究。结果表明,两种方法所得的纤维饱和点不同,顺纹抗压强度法0.5龄为36.12%;1.5～4.5龄为(24.49±0.78)%,水分吸着等温线法0.5龄为24.51%;1.5～4.5龄为(18.38±0.42)%;两种方法测得纤维饱和点的绝对数值虽然存在一定差异,但随竹龄的变化规律相同,即从0.5龄到1.5龄降幅明显,大于1.5龄后趋于稳定。

Fiber saturation point（FSP）is of great importance for the processing and utilization of bamboo wood. The FSP of Mao bamboo and its variation with age were studied by mechanical methods and isothermal adsorption respectively. The result indicates that FSP of Mao bamboo obtained with the above two methods shows some differences in absolute value; the FSP of bamboo measured with compression strength parallel to grain is 36.12 % for 0.5 year bamboo and （24.49±0.78）%for 1.5 to 4.5 years bamboo; the FSP of bamboo measured with isothermal sorption method is 24.51% for o. 5 year bamboo and （18. 38±0.42）% for 1.5 to 4.5 years bamboo; though the results caused by both two methods have some differences in absolute counts but show the same variation tendency with the change of bamboo age, namely FSP decreases quickly from 0. 5 to 1.5 years and then remains stable from 1.5 to 4.5 years.