Inverse gas chromatography (IGC) as a tool for an energetic characterisation of porous materials
Inverse gas chromatography (IGC) as a tool for an energetic characterisation of porous materials
复制标题
DOI：
10.1016/j.micromeso.2014.08.053
复制
发表时间：
2015-06
影响因子：
5.2
通讯作者：
M. Rückriem;D. Enke;T. Hahn
中科院分区：
文献类型：
--
作者：
M. Rückriem;D. Enke;T. Hahn
采用反相气相色谱法研究了含不同官能团（羟基、三甲基硅基和氨丙基）的可控孔玻璃、硅胶和有序介孔氧化硅SBA-15的表面性质。以多孔硅酸盐为模型体系，采用IGC技术研究了表面化学与表面能之间的关系。采用货车Deemter方程确定最佳载气流速。分散部分的表面能，吸附的特定自由能，受体-供体性质和吸附热的测定从IGC实验的多孔材料的能量特性。结果表明，不同的表面官能团对正构烷烃的分散相互作用以及与极性分子的特定相互作用有影响。
The surface properties of controlled pore glass, silica gel and ordered mesoporous silica SBA-15 having different functional groups (hydroxyl, trimethylsilyl and aminopropyl) were investigated by inverse gas chromatography. The porous silicates were used as model system to study correlations between surface chemistry and surface energy by means of the IGC technique. The van Deemter equation was used for the determination of optimum carrier gas flow rate. The dispersive part of surface energy, the specific free energy of adsorption, acceptor–donor properties and heat of adsorption were determined from IGC experiments for an energetic characterisation of the porous materials. It is shown that different surface functional groups have an influence onto dispersive interactions withn-alkanes as well as onto the specific interactions with polar molecules.