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提出了一种方便、科学有效的利用气体吸附法测定二氧化硅干凝胶等多孔材料分形维数 (表面分形维数和孔分布分形维数 )的方法 ,不需要进行一系列的吸附 脱附实验 ,只需要利用单一气体的一次吸附 脱附实验得出的样品孔分布、比表面数据 ,与不同的标尺进行关联 ,即可同时获得表面分形维数和孔分布分形维数 .通过误差分析和校正 ,保证了结果的可靠性 .用上述方法测定了二氧化硅干凝胶的分形维数 ,以FHH法和SAXS法对所得结果进行了比较和验证 ,并对吸附 脱附过程所得结果的差异进行了初步分析
A convenient and scientific method for the determination of the fractal dimension (surface fractal dimension and pore distribution fractal dimension) of porous materials such as silica xerogel by gas adsorption is proposed. The method does not require a series of adsorption and desorption In the experiment, the fractal dimension and surface fractal dimension of the fractal dimension and the pore size distribution can be obtained simultaneously by using the sample pore distribution, specific surface data, and different scales, which are obtained by a single adsorption-desorption experiment. By error analysis and Calibration and ensure the reliability of the results.The fractal dimension of silica xerogel was determined by the above method, the results were compared and verified by FHH method and SAXS method, and the differences between the results obtained by adsorption desorption process Conducted a preliminary analysis