A model for the interpretation of nuclear magnetic resonance spin-lattice dispersion measurements on mortar, plaster paste, synthetic clay and oil-bearing shale
A model for the interpretation of nuclear magnetic resonance spin-lattice dispersion measurements on mortar, plaster paste, synthetic clay and oil-bearing shale
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DOI：
10.1016/j.micromeso.2017.09.002
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发表时间：
2018-10-01
影响因子：
5.2
通讯作者：
McDonald, P. J.
中科院分区：
文献类型：
--
作者：
Faux, D. A.;McDonald, P. J.
提出了一种将纳米孔内流体的分子尺度动力学与核磁共振弛豫速率联系起来的模型。该模型用于重新分析来自含油页岩的分离的水和油分散体的快速场循环自旋晶格弛豫速率测量[科尔布等人，，118，199（2014）]。该模型假设孔隙流体可以用三个时间常数来表征：表面和体扩散相关时间和表面解吸时间常数。结果表明，产生有意义的和一致的孔内动力学时间常数，深入了解扩散机制和孔形态。页岩被发现是油润湿和水分散被发现是由于水的Mn 2+离子与散装水自旋的相互作用。粘土，砂浆和石膏膏分散体的测量也成功地重新分析和结果的摘要。结果表明，该模型的广泛适用性，推进NMR分散实验作为一个强大的工具，用于测量纳米多孔流体的性质。皇冠版权所有（C）2017由Elsevier Inc. All rights reserved.
A model linking the molecular-scale dynamics of fluids confined to nano-pores to nuclear magnetic resonance (NMR) relaxation rates is proposed. The model is used to re-analyse fast field-cycling spin lattice relaxation rate measurements for the separate water and oil dispersions from an oil-bearing shale [Korb et al., Phys. Chem. C, 118, 199 (2014)]. The model assumes that pore fluid can be characterized by three time constants: the surface and bulk diffusion correlation times and a surface desorption time constant. Results are shown to yield meaningful and consistent intra-pore dynamical time constants, insight into diffusion mechanisms and pore morphology. The shale is found to be oil-wetting and the water dispersion is found to be due to the interaction of aqueous Mn2+ ions with bulk water spins. Clay, mortar and plaster paste dispersions measurements have also been successfully re-analysed and a summary of the results is presented. The results demonstrate the wide applicability of the model which advances NMR dispersion experimentation as a powerful tool for measuring nano-porous fluid properties. Crown Copyright (C) 2017 Published by Elsevier Inc. All rights reserved.