桉木浆纤维多孔结构的分形分析

采用低温氮吸附法测量了桉木浆纤维的内部孔隙结构。结果表明，桉木浆纤维表面密布孔洞，孔隙分布以中孔为主，有一定量的大孔，微孔数量有限。原子力显微镜（AFM）观察也证实这一点。在低温氮吸附实验的基础上，把分形理论用于分析桉木浆纤维的孔结构，发现桉木浆纤维具有分形特征，其分形维数为2.82，分维数接近3，说明植物纤维表面较为粗糙，是密布孔洞。桉木浆纤维分形维数与其保水值等宏观性质有密切的关系。

Fractal analysis of the pore structure of eucalyptus pulp fiber

The pore structure of eucalyptus pulp fibers was investigated by means of atomic force microscopy (AFM) and low-temperature nitrogen adsorption. Then, based on the fractal theory, the pore structure was further analyzed. AFM observation indicates that the eucalyptus pulp fibers are of a pore structure with self-similarity, which can be analyzed based on the fractal theory. Low-temperature nitrogen adsorption measurement shows that the fibers are of pore surface, and that the pores are mainly in a mesopore range, with an average size of 4.9nm, a BET specific surface area of 4.83m~2/g and a total pore volume of 0.0058cm~3/g. Moreover, fractal analysis and calculation indicate that the pore structure of the fibers is of obvious fractal property in a dimension of 2.82, which means that the fibers are of rough and pore surface. It is also found that the fractal dimension of eucalyptus pulp fibers closely relates to the macroscopic properties such as water retention value.