Ono Yusuke, Mayama Hiroyuki, Furó István, Sagidullin Alexander I, Matsushima Keiichiro, Ura Haruo, Uchiyama Tomoyuki, Tsujii Kaoru
Nanotechnology Research Center, Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021, Japan.
J Colloid Interface Sci. 2009 Aug 1;336(1):215-25. doi: 10.1016/j.jcis.2009.03.087. Epub 2009 Apr 9.
We have succeeded in creating Menger sponge-like fractal body, i.e., porous-silica samples with Menger sponge-like fractal geometries, by a novel template method utilizing template particles of alkylketene dimer (AKD) and a sol-gel synthesis of tetramethyl orthosilicate (TMOS). We report here the first experimental results on characterization and structural investigations of the fractal porous-silica samples prepared with various conditions such as calcination temperature and packing condition of the template particles. In order to characterize the fractal porous-silica samples, pore volume distribution, porosity and specific surface area were measured over an extremely wide scale from 1 nm to 100 microm by means of mercury porosimetry, (1)H NMR cryoporometry, nitrogen gas adsorption experiments together with direct evaluations of cross-sectional fractal dimension D(cs), and size limits of D(cs). We have found that the pore volume distribution and specific surface area of the fractal porous-silica samples can be discussed in terms of different fractal porous structures at different scale regions.
我们通过一种利用烷基烯酮二聚体（AKD）模板颗粒和原硅酸四甲酯（TMOS）溶胶-凝胶合成的新型模板方法，成功制备出了具有门格尔海绵状分形结构的物体，即具有门格尔海绵状分形几何结构的多孔二氧化硅样品。在此，我们报告了在不同条件下（如煅烧温度和模板颗粒的堆积条件）制备的分形多孔二氧化硅样品的表征和结构研究的首批实验结果。为了表征分形多孔二氧化硅样品，通过压汞法、（1）H NMR低温孔度法、氮气吸附实验以及对横截面分形维数D（cs）和D（cs）尺寸极限的直接评估，在从1纳米到100微米的极宽尺度范围内测量了孔体积分布、孔隙率和比表面积。我们发现，分形多孔二氧化硅样品的孔体积分布和比表面积可以根据不同尺度区域的不同分形多孔结构来进行讨论。
