Physics Department, Technical University of Cluj-Napoca, 400114 Cluj-Napoca, Romania.
Magn Reson Chem. 2011 Jun;49(6):314-9. doi: 10.1002/mrc.2749. Epub 2011 Mar 31.
In the present study, we investigate the relationship between the relaxation rate and the filling factor in partially saturated porous media. The filling fluids are polar (water, acetone) and nonpolar (cyclohexane, hexane). The porous sample is a silica glass (Vitrapor#5) with the nominal mean pore size of d = 1 µm ( ± 0.6 µm). All nuclear magnetic resonance relaxation experiments are performed at 20 °C using a NMR instrument operable at 20 MHz proton resonance frequency. The experimental results are compared with a two-phase exchange model providing us information on the strength of surface relaxation and fluid distribution inside pores. These results will affect the NMR estimations about fluid content of porous media.
在本研究中，我们研究了部分饱和多孔介质中弛豫率与填充因子之间的关系。填充液体为极性（水、丙酮）和非极性（环己烷、己烷）。多孔样品是标称平均孔径为 d = 1 µm（±0.6 µm）的二氧化硅玻璃（Vitrapor#5）。所有核磁共振弛豫实验均在 20 °C 下使用工作频率为 20 MHz 的质子共振 NMR 仪器进行。实验结果与两相交换模型进行了比较，该模型为我们提供了有关表面弛豫强度和内部流体分布的信息。这些结果将影响关于多孔介质中流体含量的 NMR 估计。
